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| 19-2208; Rev 0; 10/01 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers General Description The MAX4355 is a 16 16 highly integrated video crosspoint switch matrix with input and output buffers. This device operates from dual 3V to 5V supplies or from a single +5V supply. Digital logic is supplied from an independent single +2.7V to +5.5V supply. All inputs and outputs are buffered, with all outputs able to drive standard 75 reverse-terminated video loads. The switch matrix configuration and output buffer gain are programmed through an SPITM/QSPITM-compatible, 3-wire serial interface and initialized with a single update signal. The unique serial interface operates in two modes facilitating both fast updates and initialization. On power-up, all outputs are initialized in the disabled state to avoid output conflicts in large-array configurations. Superior flexibility, high integration, and space-saving packaging make this nonblocking switch matrix ideal for routing video signals in security and video-ondemand systems. The MAX4355 is available in a 100-pin TQFP package and specified over an extended -40C to +85C temperature range. Features o 16 16 Nonblocking Matrix with Buffered Inputs and Outputs o Operates from 3V, 5V, or +5V Supplies o Individually Programmable Output Buffer Gain (AV = +1V/V or +2V/V) o High-Impedance Output Disable for Wired-OR Connections o 0.1dB Gain Flatness to 14MHz o -62dB Crosstalk, -110dB Isolation at 6MHz o 0.02%/0.12 Differential Gain/Differential Phase Error o Low 195mW Power Consumption (0.76mW per Point) MAX4355 Ordering Information PART MAX4355ECQ TEMP. RANGE -40C to +85C PIN-PACKAGE 100 TQFP Applications Security Systems Video Routing Video-on-Demand Systems Pin Configuration appears at end of data sheet. Functional Diagram Typical Operating Circuit MAX4355 IN0 AV* ENABLE/DISABLE OUT0 CAMERAS IN0 IN1 OUT1 MAX4355 MONITOR OUT0 MONITOR IN1 16 x 16 SWITCH MATRIX AV* OUT1 IN2 AV* OUT2 IN15 RESET POWER-ON RESET THERMAL SHUTDOWN AV* OUT15 DISABLE ALL OUTPUTS 256 16 16 VCC VEE AGND VDD DGND DOUT DECODE LOGIC IN15 OUT15 MONITOR DIN SCLK UPDATE CE SERIAL INTERFACE LATCHES MATRIX REGISTER 96 BITS UPDATE REGISTER 16 BITS AOUT A0-A3 MODE *AV = +1V/V OR +2V/V SPI and QSPI are trademarks of Motorola, Inc. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 ABSOLUTE MAXIMUM RATINGS Analog Supply Voltage (VCC - VEE) .....................................+11V Digital Supply Voltage (VDD - DGND) ...................................+6V Analog Supplies to Analog Ground (VCC - AGND) and (AGND - VEE) ......................................+6V Analog Ground to Digital Ground .........................-0.3V to +0.3V IN_ Voltage Range .......................... (VCC + 0.3V) to (VEE - 0.3V) OUT_ Short-Circuit Duration to AGND, VCC, or VEE ......Indefinite SCLK, CE, UPDATE, MODE, A_, DIN, DOUT, RESET, AOUT.........................(VDD + 0.3V) to (DGND - 0.3V) Current into Any Analog Input Pin (IN_) ...........................50mA Current into Any Analog Output Pin (OUT_).....................75mA Continuous Power Dissipation (TA = +70C) 100-Pin TQFP (derate 22.2mW/C above +70C).....1777mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) ................................ +300C Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 5V (VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Operating Supply Voltage Range Logic-Supply Voltage Range SYMBOL VCC VEE VDD to DGND (VEE + 2.5V) < VIN_ < (VCC - 2.5V), AV = +1V/V, RL = 150 CONDITIONS Guaranteed by PSRR test MIN 4.5 2.7 TYP MAX 10.5 5.5 UNITS V V 0.97 0.995 1 (VEE + 2.5V) < VIN_ < (VCC - 2.5V), AV = +1V/V, RL = 10k 0.99 0.999 1 Gain (Note 1) AV (VEE + 3.75V) < VIN_ < (VCC - 3.75V), AV = +2V/V, RL = 150 1.92 1.996 2.08 V/V (VEE + 3.75V) < VIN_ < (VCC - 3.75V), AV = +2V/V, RL = 10k 1.94 2.008 2.06 (VEE + 1V) < VIN_ < (VCC - 1.2V), AV = +1V/V, RL = 10k Gain Matching (Channel to Channel) RL = 10k RL = 150 0.95 0.994 1 0.5 0.5 1.5 2 % 2 _______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers DC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 5V (continued) (VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Temperature Coefficient of Gain SYMBOL TCAV RL = 10k AV = +1V/V RL = 150 Input Voltage Range VIN_ RL = 10k AV = +2V/V RL = 150 RL = 10k Output Voltage Range VOUT RL = 150 Input Bias Current Input Resistance Output Offset Voltage Output Short-Circuit Current Enabled Output Impedance Output Leakage Current, Disable Mode DC Power-Supply Rejection Ratio IB RIN_ VOFFSET ISC ZOUT IOD PSRR (VEE + 1V) < VIN_ < (VCC - 1.2V) AV = +1V/V AV = +2V/V Sinking or sourcing, RL = 1 (VEE + 1V) < VIN_ < (VCC - 1.2V) (VEE + 1V) < VOUT_ < (VCC - 1.2V) 4.5V < (VCC - VEE) < 10.5V Outputs enabled, TA = +25C Outputs enabled Outputs disabled Quiescent Supply Current IEE RL = Outputs enabled, TA = +25C Outputs enabled Outputs disabled IDD 50 4 55 95 60 VEE +1 VEE + 2.5 VEE + 3 VEE + 3.75 VEE + 1 VEE + 2.5 4 10 5 10 40 0.2 0.004 70 100 150 175 75 150 175 75 8 mA 1 20 40 CONDITIONS MIN TYP 10 VCC 1.2 VCC 2.5 V VCC 3.1 VCC 3.75 VCC 1.2 VCC 2.5 11 V V A M mV mA A dB MAX UNITS ppm/C MAX4355 ICC RL = _______________________________________________________________________________________ 3 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 DC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 3V (VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Operating Supply Voltage Range Logic-Supply Voltage Range SYMBOL VCC VEE VDD to DGND (VEE + 1V) < VIN_ < (VCC - 1.2V), AV = +1V/V, RL = 150 (VEE + 1V) < VIN_ < (VCC - 1.2V), AV = +1V/V, RL = 10k Gain (Note 1) AV (VEE + 2V) < VIN_ < (VCC - 2.1V), AV = +2V/V, RL = 150 (VEE + 2V) < VIN_ < (VCC - 2.1V), AV = +2V/V, RL = 10k Gain Matching (Channel to Channel) Temperature Coefficient of Gain TCAV RL = 10k AV = +1V/V RL = 150 Input Voltage Range VIN_ RL = 10k AV = +2V/V RL = 150 RL = 10k Output Voltage Range VOUT RL = 150 Input Bias Current Input Resistance Output Offset Voltage IB RIN VOFFSET (VEE + 1V) < VIN_ < (VCC - 1.2V) AV = +1V/V AV = +2V/V VEE + 1 VEE + 1 VEE + 2 VEE + 2 VEE + 1 VEE + 1 4 10 5 10 20 40 RL = 10k RL = 150 1.92 1.985 2.08 CONDITIONS Guaranteed by PSRR test MIN 4.5 2.7 0.94 0.983 TYP MAX 10.5 5.5 1 UNITS V V 0.96 0.993 1 V/V 1.94 2.000 0.5 0.5 10 2.06 1.5 2 % ppm/C VCC 1.2 VCC 1.2 V VCC 2.1 VCC 2.1 VCC 1.2 V VCC 1.2 11 A M mV 4 _______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers DC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 3V (continued) (VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Output Short-Circuit Current Enabled Output Impedance Output Leakage Current, Disable Mode DC Power-Supply Rejection Ratio SYMBOL ISC ZOUT IOD PSRR ICC Quiescent Supply Current IEE IDD CONDITIONS Sinking or sourcing, RL = 1 (VEE + 1V) < VIN_ < (VCC - 1.2V) (VEE + 1V) < VOUT_ < (VCC - 1.2V) 4.5V < (VCC - VEE) < 10.5V RL = RL = Outputs enabled Outputs disabled Outputs enabled Outputs disabled 60 MIN TYP 40 0.2 0.004 75 80 40 75 35 4 mA 1 MAX UNITS mA A dB MAX4355 DC ELECTRICAL CHARACTERISTICS--SINGLE SUPPLY +5V (VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = +1.75V, AV = +1V/V, RL = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Operating Supply Voltage Range Logic-Supply Voltage Range SYMBOL VCC VDD to DGND (VEE + 1V) < VIN < (VCC - 2.5V), AV = +1V/V, RL = 150 (VEE + 1V) < VIN < (VCC - 1.2V), AV = +1V/V, RL = 10k RL = 10k RL = 150 TCAV RL = 10k Input Voltage Range VIN AV = +1V/V RL = 150 VEE +1 VEE +1 CONDITIONS Guaranteed by PSRR test MIN 4.5 2.7 0.94 0.94 0.995 0.995 0.5 0.5 10 VCC - 1.2 VCC - 2.5 V TYP MAX 5.5 5.5 1 V/V 1 3 3 % ppm/ C UNITS V V Gain (Note 1) AV Gain Matching (Channel to Channel) Temperature Coefficient of Gain _______________________________________________________________________________________ 5 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 DC ELECTRICAL CHARACTERISTICS--SINGLE SUPPLY +5V (continued) (VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = +1.75V, AV = +1V/V, RL = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SYMBOL CONDITIONS AV = +1V/V, RL = 10k Output Voltage Range VOUT AV = +1V/V, RL = 150 Input Bias Current Input Resistance Output Offset Voltage Output Short-Circuit Current Enabled Output Impedance Output Leakage Current, Disable Mode DC Power-Supply Rejection Ratio IB RIN VOFFSET ISC ZOUT IOD PSRR ICC Quiescent Supply Current IEE IDD VEE + 1V < VIN_ < VCC - 1.2V AV = +1V/V Sinking or sourcing, RL = 1 (VEE + 1V) < VIN_ < (VCC - 1.2V) (VEE + 1V) < VOUT_ < (VCC - 1.2V) 4.5V < (VCC - VEE) < 5.5V RL = RL = TA = +25C to +85C TA = -40C to +85C 50 35 80 35 75 30 4 mA MIN VEE +1 VEE +1 4 10 10 35 0.2 0.004 65 1 40 TYP MAX VCC - 1.2 VCC - 2.5 11 UNITS V A M mV mA A dB Outputs enabled, TA = +25C Outputs disabled Outputs enabled, TA = +25C Outputs disabled 6 _______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 LOGIC-LEVEL CHARACTERISTICS (V CC - V EE) = +4.5V to +10.5V, V DD = +2.7V to +5.5V, AGND = DGND = 0, V IN _ = 0, R L = 150 to AGND, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2) PARAMETER Input Voltage High Level Input Voltage Low Level Input Current High Level Input Current Low Level Output Voltage High Level Output Voltage Low Level Output Current High Level Output Current Low Level SYMBOL VIH VIL IIH IIL VOH VOL IOH IOL VDD = +5.0V VDD = +3V VDD = +5.0V VDD = +3V VI > 2V VI < 1V Excluding RESET RESET Excluding RESET RESET -1 -30 -1 -300 4.7 2.7 0.01 -20 0.01 -235 4.9 2.9 0.1 0.1 1 1 1 1 4 8 4 8 0.3 0.3 1 CONDITIONS MIN 3 2 0.8 0.6 1 TYP MAX UNITS V V A A V V mA mA ISOURCE = 1mA, VDD = +5V ISOURCE = 1mA, VDD = +3V ISINK = 1mA, VDD = +5V ISINK = 1mA, VDD = +3V VDD = +5V, VO = +4.9V VDD = +3V, VO = +2.7V VDD = +5V, VO = +0.1V VDD = +3V, VO = +0.3V AC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 5V (VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth Medium-Signal -3dB Bandwidth Large-Signal -3dB Bandwidth Small-Signal 0.1dB Bandwidth Medium-Signal 0.1dB Bandwidth Large-Signal 0.1dB Bandwidth Slew Rate SYMBOL BWSS BWMS BWLS BW0.1dB-SS BW0.1dB-MS BW0.1dB-LS SR CONDITIONS VOUT = 20mVp-p VOUT_ = 200mVp-p VOUT_ = 2Vp-p VOUT = 20mVp-p VOUT_ = 200mVp-p VOUT_ = 2Vp-p AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V MIN TYP 110 78 80 75 40 50 14 11 14 11 14 11 150 150 MAX UNITS MHz MHz MHz MHz MHz MHz V/s VOUT_ = 2V step, AV = +1V/V VOUT_ = 2V step, AV = +2V/V _______________________________________________________________________________________ 7 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 AC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 5V (continued) (VCC = +5V, VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) PARAMETER Settling Time Switching Transient (Glitch) (Note 3) AC Power-Supply Rejection Ratio Differential Gain Error (Note 4) Differential Phase Error (Note 4) Crosstalk, All Hostile Off-Isolation, Input to Output Input Noise Voltage Density Input Capacitance Disabled Output Capacitance Capacitive Load at 3dB Output Peaking Output Impedance ZOUT f = 6MHz Output enabled Output disabled en CIN Amplifier in disable mode SYMBOL tS 0.1% CONDITIONS VOUT_ = 0 to 2V step AV = +1V/V AV = +2V/V f = 100kHz f = 1MHz RL = 1k RL = 150 RL = 1k RL = 150 f = 6MHz f = 6MHz BW = 6MHz AV = +1V/V AV = +2V/V MIN TYP 60 60 50 45 70 68 0.002 0.02 0.02 0.12 -62 -110 73 5 3 30 3 4k MAX UNITS ns mV dB % degrees dB dB VRMS pF pF pF AC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 3V (VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_= 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth Medium-Signal -3dB Bandwidth Large-Signal -3dB Bandwidth Small-Signal 0.1dB Bandwidth Medium-Signal 0.1dB Bandwidth Large-Signal 0.1dB Bandwidth SYMBOL BWSS BWMS BWLS BW0.1dB-SS BW0.1dB-MS BW0.1dB-LS CONDITIONS AV = +1V/V VOUT_ = 20mVp-p AV = +2V/V VOUT_ = 200mVp-p VOUT_ = 2Vp-p VOUT_ = 20mVp-p VOUT_ = 200mVp-p VOUT_ = 2Vp-p AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V MIN TYP 110 70 110 70 32 38 12 12 12 12 12 12 MAX UNITS MHz MHz MHz MHz MHz MHz 8 _______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 AC ELECTRICAL CHARACTERISTICS--DUAL SUPPLIES 3V (continued) (VCC = +3V, VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) PARAMETER Slew Rate Settling Time Switching Transient (Glitch) (Note 3) AC Power-Supply Rejection Ratio Differential Gain Error (Note 4) Differential Phase Error (Note 4) Crosstalk, All Hostile Off-Isolation, Input to Output Input Noise Voltage Density Input Capacitance Disabled Output Capacitance Capacitive Load at 3dB Output Peaking Output Impedance ZOUT SYMBOL SR tS 0.1% CONDITIONS VOUT_ = 2V step, AV = +1V/V VOUT_ = 2V step, AV = +2V/V VO = 0 to 2V step AV = +1V/V AV = +2V/V f = 100kHz f = 1MHz RL = 1k RL = 150 RL = 1k RL = 150 f = 6MHz f = 6MHz AV = +1V/V AV = +2V/V MIN TYP 125 125 60 60 20 20 72 71 0.02 0.15 0.05 0.2 -63 -112 73 5 3 30 MAX UNITS V/s ns mV dB % degrees dB dB VRMS pF pF pF en CIN_ BW = 6MHz Amplifier in disable mode f = 6MHz Output enabled Output disabled 3 4k _______________________________________________________________________________________ 9 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 AC ELECTRICAL CHARACTERISTICS--SINGLE SUPPLY +5V (VCC = +5V, VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 1.75V, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth Medium-Signal -3dB Bandwidth Large-Signal -3dB Bandwidth Small-Signal 0.1dB Bandwidth Medium-Signal 0.1dB Bandwidth Large-Signal 0.1dB Bandwidth Slew Rate Settling Time Switching Transient (Glitch) AC Power-Supply Rejection Ratio Differential Gain Error (Note 4) Differential Phase Error (Note 4) Crosstalk, All Hostile Off-Isolation, Input to Output Input Noise Voltage Density Input Capacitance Disabled Output Capacitance Capacitive Load at 3dB Output Peaking Output Impedance ZOUT f = 6MHz Output enabled Output disabled f = 100kHz f = 1MHz RL = 1k RL = 150 RL = 1k RL = 150 f = 6MHz f = 6MHz en CIN_ Amplifier in disable mode BW = 6MHz SYMBOL BWSS BWMS BWLS BW0.1dB-SS BW0.1dB-MS BW0.1dB-LS SR tS 0.1% CONDITIONS VOUT_ = 20mVp-p VOUT_ = 200mVp-p VOUT_ = 1.5Vp-p VOUT_ = 20mVp-p VOUT_ = 200mVp-p VOUT_ = 1.5Vp-p VOUT_ = 2V step, AV = +1V/V VOUT_ = 0 to 2V step MIN TYP 100 100 40 10 12 14 100 60 25 70 69 0.1 0.2 0.05 0.2 -63 -110 73 5 3 30 3 4k MAX UNITS MHz MHz MHz MHz MHz MHz V/s ns mV dB % degrees dB dB VRMS pF pF pF 10 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 SWITCHING CHARACTERISTICS ((VCC - VEE) = +4.5V to +10.5V, VDD = +2.7V to +5.5V, DGND = AGND = 0, VIN_ = 0 for dual supplies, VIN_ = +1.75V for single supply, RL = 150 to AGND, CL = 100pF, AV = +1V/V, and TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER Delay: UPDATE to Video Out Delay: UPDATE to AOUT Delay: SCLK to DOUT Valid Delay: Output Disable Delay: Output Enable Setup: CE to SCLK Setup: DIN to SCLK Hold Time: SCLK to DIN Minimum High Time: SCLK Minimum Low Time: SCLK Minimum Low Time: UPDATE Setup Time: UPDATE to SCLK Hold Time: SCLK to UPDATE Setup Time: MODE to SCLK Hold Time: MODE to SCLK Minimum Low Time: RESET Delay: RESET SYMBOL tPdUdVo tPdUdAo tPdDo tPdHOe tPdLOe tSuCe tSuDi tHdDi tMnHCk tMnLCk tMnLUd tSuHUd tHdHUd tSuMd tHdMd tMnLRst tPdRst 10k pulldown to AGND, 0.5V step Rising edge of UPDATE to falling edge of SCLK Falling edge of SCLK to falling edge of UPDATE Minimum time from clock edge to MODE with valid data clocking Minimum time from clock edge to MODE with valid data clocking 100 100 100 100 100 100 100 100 100 300 600 CONDITIONS VIN = 0.5V step MODE = 0, time to AOUT = low after UPDATE = low Logic state change in DOUT on active SCLK edge VOUT = 0.5V, 1k pulldown to AGND Output disabled, 1k pulldown to AGND, VIN = 0.5V MIN TYP 200 30 30 300 200 MAX 450 200 200 800 800 100 UNITS ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns Note 1: Associated output voltage may be determined by multiplying the input voltage by the specified gain (AV) and adding output offset voltage. Note 2: Logic-level characteristics apply to the following pins: DIN, DOUT, SCLK, CE, UPDATE, RESET, A3-A0, MODE, and AOUT. Note 3: Switching transient settling time is guaranteed by the settling time (tS) specification. Switching transient is a result of updating the switch matrix. Note 4: Input test signal: 3.58MHz sine wave of amplitude 40IRE superimposed on a linear ramp (0 to 100IRE). IRE is a unit of video-signal amplitude developed by the International Radio Engineers: 140IRE = 1.0V. Note 5: All devices are 100% production tested at TA = +25C. Specifications over temperature limits are guaranteed by design. ______________________________________________________________________________________ 11 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Symbol Definitions SYMBOL Ao Ce Ck Di Do Md Oe Rst Ud Vo H Hd L Mn Mx Pd Su Tr W TYPE Signal Signal Signal Signal Signal Signal Signal Signal Signal Signal Property Property Property Property Property Property Property Property Property DESCRIPTION Address Valid Flag (AOUT) Clock Enable (CE) Clock (SCLK) Serial Data In (DIN) Serial Data Output (DOUT) MODE Output Enable Reset Input (RESET) UPDATE Video Out (OUT) High- or Low-to-High Transition Hold Low- or High-to-Low Transition Minimum Maximum Propagation Delay Setup Transition Width Naming Conventions * All parameters with time units are given a "t" designation, with appropriate subscript modifiers. * Propagation delays for clocked signals are from the active edge of clock. * Propagation delay for level-sensitive signals is from input to output at the 50% point of a transition. * Setup and hold times are measured from the 50% point of signal transition to the 50% point of the clocking signal transition. * Setup time refers to any signal that must be stable before the active clock edge, even if the signal is not latched or clocked itself. * Hold time refers to any signal that must be stable during and after active clock edge, even if the signal is not latched or clocked. * Propagation delays to unobservable internal signals are modified to setup and hold designations applied to observable I/O signals. 12 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 DATA AND CONTROL TIMING Ce: CE tSuCe Ck: SCLK tMnHCk tMnLCk Di: DIN Do: DOUT tPdDo Ud: UPDATE tMnLUd tHdUd tWTrVo Vo: OUT_ Ao: AOUT tPdUdAo tPdHOeVo Oe: OUTPUT ENABLE tPdLOeVo tPdRstVo tMnlRst Hi-Z tPdUdVo Hi-Z tSuUd tSuDi tHdDi tHdCe NAME tHdDi tMnHCk tMnLCk tMnLUd tSuHUd Not Valid tHdHUd Not Valid tPdDiDo tMnMd tMxTr tMnLRst tPdRstVo TIMING PARAMETER DEFINITIONS DESCRIPTION Hold Time: Clock to Data In Min High Time: Clk Min Low Time: Clk Min Low Time: Update Setup Time: UPDATE to Clk with UPDATE High Setup Time: UPDATE to Clk with UPDATE Low Hold Time: Clk to UPDATE with UPDATE high Hold Time: Clk to UPDATE with UPDATE Low Asynchronous Delay: Data In to Data Out Min Low Time: MODE Max Rise Time: Clk, Update Min Low Time: Reset Delay: Reset to Video Output TIMING PARAMETER DEFINITIONS DESCRIPTION Delay: Update to Video Out Delay: UPDATE to Aout Delay: Clk to Data Out Delay: Output Enable to Video Output (High: Disable) Delay: Output Enable to Video Output (Low: Enable) Setup: Clock Enable to Clock Setup Time: Data In to Clock NAME tPdUdVo tPdUdAo tPdDo tPdHOeVo tPdLOeVo tSuCe tSuDi Rst: RESET Figure 1. Timing Diagram ______________________________________________________________________________________ 13 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Dual Supplies 5V (VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) LARGE-SIGNAL FREQUENCY RESPONSE MAX4355 toc01 MEDIUM-SIGNAL FREQUENCY RESPONSE MAX4355 toc02 SMALL-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +2V/V AV = +1V/V RL = 150 MAX4355 toc03 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 1 10 FREQUENCY (MHz) 100 AV = +1V/V AV = +2V/V RL = 150 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +2V/V AV = +1V/V RL = 150 3 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 LARGE-SIGNAL FREQUENCY RESPONSE MAX4355 toc04 MEDIUM-SIGNAL FREQUENCY RESPONSE MAX4355 toc05 SMALL-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +2V/V RL = 1k AV = +1V/V MAX4355 toc06 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 1 10 FREQUENCY (MHz) 100 AV = +2V/V AV = +1V/V RL = 1k 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +1V/V AV = +2V/V RL = 1k 3 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY MAX4355 toc07 LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY MAX4355 toc08 LARGE-SIGNAL FREQUENCY RESPONSE (AV = +1V/V) 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 CL = 30pF CL = 15pF RL = 150 CL = 45pF MAX4355 toc09 0.3 0.2 0.1 NORMALIZED GAIN (dB) 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 0.1 1 10 FREQUENCY (MHz) 100 AV = +2V/V AV = +1V/V RL = 150 0.3 0.2 0.1 NORMALIZED GAIN (dB) 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 AV = +2V/V AV = +1V/V RL = 1k 3 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 14 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Typical Operating Characteristics--Dual Supplies 5V (continued) (VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) LARGE-SIGNAL FREQUENCY RESPONSE (AV = +2V/V) MAX4355 toc10 MAX4355 MEDIUM-SIGNAL FREQUENCY RESPONSE (AV = +1V/V) MAX4355 toc11 MEDIUM-SIGNAL FREQUENCY RESPONSE (AV = +2V/V) 6 5 NORMALIZED GAIN (dB) 4 3 2 1 0 -1 -2 CL = 15pF 0.1 1 10 FREQUENCY (MHz) 100 1000 CL = 30pF CL = 45pF MAX4355 toc12 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 1 10 FREQUENCY (MHz) 100 CL = 30pF CL = 15pF RL = 150 CL = 45pF 15 CL = 45pF 7 10 NORMALIZED GAIN (dB) 5 CL = 30pF 0 CL = 15pF -5 -10 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 -3 CROSSTALK vs. FREQUENCY MAX4355 toc13 CROSSTALK vs. FREQUENCY MAX4355 toc14 DISTORTION vs. FREQUENCY -10 -20 DISTORTION (dBc) -30 -40 -50 -60 -70 -80 -90 3RD HARMONIC 2ND HARMONIC AV = +1V/V MAX4355 toc15 -40 AV = +1V/V -50 CROSSTALK (dB) -60 -70 -80 -90 -100 0.1 1 10 FREQUENCY (MHz) 100 -40 AV = +2V/V -50 CROSSTALK (dB) -60 -70 -80 -90 -100 0 -100 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 100 FREQUENCY (MHz) 1000 DISTORTION vs. FREQUENCY -10 -20 DISTORTION (dBc) -30 -40 -50 -60 -70 -80 -90 -100 0.1 1 10 100 FREQUENCY (MHz) -0.1 0.1 3RD HARMONIC 2ND HARMONIC AV = +2V/V MAX4355 toc16 ENABLED OUTPUT IMPEDANCE vs. FREQUENCY MAX4355 toc17 DISABLED OUTPUT IMPEDANCE vs. FREQUENCY MAX4355 toc18 0 1000 1M 100k OUTPUT IMPEDANCE () 10k 1k 100 10 1 OUTPUT IMPEDANCE () 100 10 1 1 10 FREQUENCY (MHz) 100 1000 100k 1M 10M FREQUENCY (Hz) 100M 1G ______________________________________________________________________________________ 15 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Dual Supplies 5V (continued) (VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) OFF-ISOLATION vs. FREQUENCY MAX4355 toc19 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX4355 toc20 INPUT VOLTAGE NOISE vs. FREQUENCY MAX4355 toc21 -40 -50 OFF-ISOLATION (dB) -60 -50 1000 PSRR (dB) -70 -80 -90 -100 -110 -120 100k 1M 10M FREQUENCY (Hz) 100M 1G -60 VOLTAGE NOISE (nV/Hz) -55 100 -65 -70 -75 10k 100k 1M FREQUENCY (Hz) 10M 100M 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) LARGE-SIGNAL PULSE RESPONSE (AV = +1V/V) MAX4355 toc22 LARGE-SIGNAL PULSE RESPONSE (AV = +2V/V) MEDIUM-SIGNAL PULSE RESPONSE (AV = +1V/V) MAX4355 toc23 MAX4355 toc24 INPUT 1V/div INPUT 0.5V/div INPUT 100mV/div OUTPUT 0.5V/div OUTPUT 0.5V/div OUTPUT 50mV/div 25ns/div 25ns/div 25ns/div MEDIUM-SIGNAL PULSE RESPONSE (AV = +2V/V) MAX4355 toc25 SWITCHING TIME (AV = +1V/V) MAX4355 toc26 SWITCHING TIME (AV = +2V/V) MAX4355 toc27 INPUT 50mV/div VUPDATE 5V/div VUPDATE 5V/div OUTPUT 50mV/div VOUT 500mV/div VOUT 1V/div 25ns/div 20ns/div 20ns/div 16 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Typical Operating Characteristics--Dual Supplies 5V (continued) (VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) SWITCHING TRANSIENT (GLITCH) (AV = +1V/V) SWITCHING TRANSIENT (GLITCH) (AV = +2V/V) MAX4355 OFFSET VOLTAGE DISTRIBUTION MAX4355 toc30 MAX4355 toc28 MAX4355 toc29 300 250 200 150 100 50 0 VUPDATE 5V/div VUPDATE 5V/div VOUT 25mV/div VOUT 25mV/div 20ns/div 20ns/div -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 OFFSET VOLTAGE (mV) DIFFERENTIAL GAIN AND PHASE (RL = 150) MAX4355 toc31 DIFFERENTIAL GAIN AND PHASE (RL = 1k) DIFFERENTIAL GAIN (%) 0.004 0.002 0 -0.002 -0.004 MAX4355 toc32 LARGE-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +1V/V) MAX4355 toc33 DIFFERENTIAL GAIN (%) 0.08 0.06 0.04 0.02 0 -0.02 INPUT 1V/div 0 10 20 30 40 50 60 70 80 90 100 0.15 0.10 0.05 0 -0.05 0 10 20 30 40 50 60 70 80 90 100 IRE 0.03 0.02 0.01 0 -0.01 0 10 20 30 40 50 60 70 80 90 100 DIFFERENTIAL PHASE () DIFFERENTIAL PHASE () OUTPUT 0.5/Vdiv 0 10 20 30 40 50 60 70 80 90 100 IRE 25ns/div LARGE-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +2V/V) MAX4355 toc34 MEDIUM-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +1V/V) MAX4355 toc35 MEDIUM-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +2V/V) MAX4355 toc36 INPUT 0.5V/div INPUT 100mV/div INPUT 50mV/div OUTPUT 0.5V/div OUTPUT 50mV/div OUTPUT 50mV/div 25ns/div 25ns/div 25ns/div ______________________________________________________________________________________ 17 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Dual Supplies 5V (continued) (VCC = +5V and VEE = -5V, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) GAIN vs. TEMPERATURE MAX4355 toc37 RESET DELAY vs. RESET CAPACITANCE 1 100m MAX4355 toc38 0.20 0.15 NORMALIZED GAIN (dB) 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 75 AV = +1V/V AV = +2V/V 10 RESET DELAY (s) 100 10m 1m 100 10 1 100n 10n 1p 10p 100p 1n 10n 100n 1 10 100 CRESET (F) TEMPERATURE (C) SUPPLY CURRENT vs. TEMPERATURE MAX4355 toc39 70 60 SUPPLY CURRENT (mA) 50 40 IEE 30 20 10 0 -50 -25 0 25 50 75 IDD ICC 100 TEMPERATURE (C) 18 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Typical Operating Characteristics--Dual Supplies 3V (VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) LARGE-SIGNAL FREQUENCY RESPONSE MAX4355 toc40 MAX4355 MEDIUM-SIGNAL FREQUENCY RESPONSE MAX4355 toc41 SMALL-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +2V/V AV = +1V/V RL = 150 MAX4355 toc42 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 1 10 FREQUENCY (MHz) 100 AV = +1V/V AV = +2V/V RL = 150 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +2V/V AV = +1V/V RL = 150 3 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 LARGE-SIGNAL FREQUENCY RESPONSE MAX4355 toc43 MEDIUM-SIGNAL FREQUENCY RESPONSE MAX4355 toc44 SMALL-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 AV = +2V/V AV = +1V/V RL = 1k MAX4355 toc45 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 RL = 1k 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 RL = 1k 3 AV = +2V/V AV = +1V/V AV = +1V/V AV = +2V/V 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 LARGE-SIGNAL GAIN FLATNESS MAX4355 toc46 LARGE-SIGNAL GAIN FLATNESS 0.2 0.1 NORMALIZED GAIN (dB) 0 -0.1 -0.2 -0.3 -0.4 -0.5 RL = 1k MAX4355 toc47 LARGE-SIGNAL FREQUENCY RESPONSE (AV = +1V/V) 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 CL = 30pF CL = 15pF CL = 45pF MAX4355 toc48 0.3 0.2 0.1 NORMALIZED GAIN (dB) 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 0.1 RL = 150 0.3 3 AV = +1V/V AV = +2V/V AV = +1V/V AV = +2V/V 1 10 FREQUENCY (MHz) 100 1000 -0.6 -0.7 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 ______________________________________________________________________________________ 19 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Dual Supplies 3V (continued) (VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) LARGE-SIGNAL FREQUENCY RESPONSE (AV = +2V/V) MAX4355 toc49 MEDIUM-SIGNAL FREQUENCY RESPONSE (AV = +1V/V) MAX4355 toc50 MEDIUM-SIGNAL FREQUENCY RESPONSE (AV = +2V/V) 5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 CL = 15pF CL = 30pF CL = 45pF MAX4355 toc51 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 1 10 FREQUENCY (MHz) 100 CL = 30pF CL = 15pF CL = 45pF 8 6 NORMALIZED GAIN (dB) 4 2 0 -2 -4 -6 -8 CL = 15pF CL = 30pF CL = 45pF 6 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 CROSSTALK VS. FREQUENCY MAX4355 toc52 CROSSTALK VS. FREQUENCY MAX4355 toc53 DISTORTION VS. FREQUENCY -10 -20 DISTORTION (dBc) -30 -40 -50 -60 -70 -80 -90 -100 3RD HARMONIC 2ND HARMONIC AV = +1V/V MAX4355 toc54 -40 -45 -50 CROSSTALK (dB) -55 -60 -65 -70 -75 -80 -85 -90 1k AV = +1V/V -30 -35 -40 CROSSTALK (dB) -45 -50 -55 -60 -65 -70 -75 -80 0 AV = +2V/V 1M 10M FREQUENCY (Hz) 100M 1G 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 100 FREQUENCY (MHz) DISTORTION VS. FREQUENCY MAX4355 toc55 ENABLED OUTPUT IMPEDANCE VS. FREQUENCY MAX4355 toc56 DISABLED OUTPUT IMPEDANCE VS. FREQUENCY MAX4355 toc57 0 -10 -20 CROSSTALK (dBc) -30 -40 -50 -60 -70 -80 -90 -100 0.1 1M 10M 3RD HARMONIC 2ND HARMONIC AV = +2V/V 1000 1M 100k OUTPUT IMPEDANCE () 10k 1k 100 10 1 OUTPUT IMPEDANCE () 100M 100 10 1 0.1 0.1 1 10 FREQUENCY (MHz) 100 1000 FREQUENCY (Hz) 0.1 1 10 FREQUENCY (MHz) 100 1000 20 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Typical Operating Characteristics--Dual Supplies 3V (continued) (VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) POWER-SUPPLY REJECTION RATIO VS. FREQUENCY MAX4355 toc59 MAX4355 OFF-ISOLATION VS. FREQUENCY -50 OFF-ISOLATION (dB) -60 PSRR (dB) -70 -80 -90 -100 -110 -120 100k 1M 10M FREQUENCY (Hz) 100M 1G -75 10k -70 MAX4355 toc58 INPUT VOLTAGE NOISE vs. FREQUENCY MAX4355 toc60 -40 -55 1000 -60 VOLTAGE NOISE (nV/Hz) 100k 1M FREQUENCY (Hz) 10M 100M -65 100 10 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz) LARGE-SIGNAL PULSE RESPONSE (AV = +1V/V) MAX4355 toc61 LARGE-SIGNAL PULSE RESPONSE (AV = +2V/V) MAX4355 toc62 MEDIUM-SIGNAL PULSE RESPONSE (AV = +1V/V) MAX4355 toc63 INPUT 1V/div INPUT 0.5V/div INPUT 100mV/div OUTPUT 0.5V/div OUTPUT 0.5V/div OUTPUT 50mV/div 25ns/div 25ns/div 25ns/div MEDIUM-SIGNAL PULSE RESPONSE (AV = +2V/V) SWITCHING TIME (AV = +1V/V) MAX4355 toc64 MAX4355 toc65 SWITCHING TIME (AV = +2V/V) MAX4355 toc66 INPUT 50mV/div VUPDATE 3V/div VUPDATE 3V/div OUTPUT 50mV/div VOUT 500mV/div VOUT 1V/div 25ns/div 20ns/div 20ns/div ______________________________________________________________________________________ 21 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Dual Supplies 3V (continued) (VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) SWITCHING TRANSIENT (GLITCH) (AV = +1V/V) MAX4355 toc67 SWITCHING TRANSIENT (GLITCH) (AV = +2V/V) MAX4355 toc68 OFFSET VOLTAGE DISTRIBUTION MAX4355 toc69 300 250 VUPDATE 3V/div VUPDATE 3V/div 200 150 VOUT 25mV/div VOUT 25mV/div 100 50 0 20ns/div 20ns/div -15 -13 -11 -9 -7 -5 -3 -1 1 3 5 OFFSET VOLTAGE (mV) DIFFERENTIAL GAIN AND PHASE (RL = 150) MAX4355 toc70 DIFFERENTIAL GAIN AND PHASE (RL = 1k) 0.010 0.005 0 -0.010 -0.015 -0.020 0.08 DIFFERENTIAL GAIN (%) MAX4355 toc71 LARGE-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +1V/V) MAX4355 toc72 0.20 0.15 0.10 0.05 0 -0.05 DIFFERENTIAL GAIN (%) INPUT 1V/div 0.25 0.20 0.15 0.10 0.05 0 -0.05 10 20 30 40 50 60 70 80 90 100 IRE DIFFERENTIAL PHASE () DIFFERENTIAL PHASE () 0.06 0.04 0.02 0 -0.02 10 20 30 40 50 60 70 80 90 100 IRE OUTPUT 500mV/div 25ns/div LARGE-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +2V/V) MAX4355 toc73 MEDIUM-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +1V/V) MAX4355 toc74 MEDIUM-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF, AV = +2V/V) MAX4355 toc75 INPUT 0.5V/div INPUT 100mV/div INPUT 50mV/div OUTPUT 0.5V/div OUTPUT 50mV/div OUTPUT 50mV/div 25ns/div 25ns/div 25ns/div 22 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Typical Operating Characteristics--Dual Supplies 3V (continued) (VCC = +3V and VEE = -3V, VDD = +3V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, and TA = +25C, unless otherwise noted.) GAIN VS. TEMPERATURE MAX4355 toc76 MAX4355 RESET DELAY vs. RESET CAPACITANCE 1 100m RESET DELAY (s) 10m 1m 100 10 1 100n 10n MAX4355 toc77 0.20 0.15 NORMALIZED GAIN (dB) 0.10 0.05 0 -0.05 -0.10 AV = +1V/V -0.15 -0.20 -50 -25 0 25 50 75 AV = +2V/V 10 100 1p 10p 100p 1n 10n 100n 1 10 100 CRESET (F) TEMPERATURE (C) ______________________________________________________________________________________ 23 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Single Supply +5V (VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) LARGE-SIGNAL FREQUENCY RESPONSE MAX4355 toc78 MEDIUM-SIGNAL FREQUENCY RESPONSE MAX4355 toc79 SMALL-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 RL = 150 MAX4355 toc80 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 0.1 RL = 150 3 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 RL = 150 3 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 LARGE-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 100k 1M 10M FREQUENCY (Hz) 100M 1G RL = 1k MAX4355 toc81 MEDIUM-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 100k 1M 10M FREQUENCY (Hz) 100M 1G RL = 1k MAX4355 toc82 SMALL-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 100k 1M 10M FREQUENCY (Hz) 100M 1G RL = 1k MAX4355 toc83 3 3 3 LARGE-SIGNAL GAIN FLATNESS MAX4355 toc84 LARGE-SIGNAL GAIN FLATNESS 0.2 0.1 NORMALIZED GAIN (dB) 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 RL = 1k MAX4355 toc85 LARGE-SIGNAL FREQUENCY RESPONSE 2 1 NORMALIZED GAIN (dB) 0 -1 -2 -3 -4 -5 -6 -7 CL = 15pF CL = 30pF CL = 45pF MAX4355 toc86 0.3 0.2 0.1 NORMALIZED GAIN (dB) 0 -0.1 -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 0.1 RL = 150 0.3 3 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 0.1 1 10 FREQUENCY (MHz) 100 1000 24 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Typical Operating Characteristics--Single Supply +5V (continued) (VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) MEDIUM-SIGNAL FREQUENCY RESPONSE MAX4355 toc87 MAX4355 CROSSTALK vs. FREQUENCY MAX4355 toc88 DISTORTION vs. FREQUENCY -10 -20 DISTORTION () -30 -40 -50 -60 -70 -80 -90 -100 3RD HARMONIC 2ND HARMONIC MAX4355 toc89 7 5 NORMALIZED GAIN (dB) 3 CL = 45pF CL = 30pF -50 -55 -60 CROSSTALK (dB) -65 -70 -75 -80 -85 -90 0 1 -1 -3 -5 -7 100k 1M 10M FREQUENCY (Hz) 100M 1G CL = 15pF -95 -100 100k 1M 10M 100M 1G FREQUENCY (MHz) 0.1 1 10 100 FREQUENCY (MHz) ENABLED OUTPUT IMPEDANCE vs. FREQUENCY MAX4355 toc90 DISABLED OUTPUT IMPEDANCE vs. FREQUENCY MAX4355 toc91 OFF-ISOLATION vs. FREQUENCY -50 OFF-ISOLATION (dB) -60 -70 -80 -90 -100 MAX4355 toc92 1k 1M 100k OUTPUT IMPEDANCE () 10k 1k 100 10 -40 OUTPUT IMPEDANCE () 100 10 1 -110 0.1 0.1 1 10 FREQUENCY (MHz) 100 1000 1 100k 1M 10M FREQUENCY (Hz) 100M 1G -120 100k 1M 10M FREQUENCY (Hz) 100M 1G POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX4355 toc93 INPUT VOLTAGE NOISE vs. FREQUENCY MAX4355 toc94 LARGE-SIGNAL PULSE RESPONSE MAX4355 toc95 -50 1000 PSRR (dB) -60 VOLTAGE NOISE (nV/Hz) -55 INPUT 1V/div 100 OUTPUT 0.5V/div -65 -70 -75 10k 100k 1M FREQUENCY (Hz) 10M 100M 1 10 100 1k 10k 100k 1M 10M 25ns/div FREQUENCY (Hz) ______________________________________________________________________________________ 25 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Single Supply +5V (continued) (VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) MEDIUM-SIGNAL PULSE RESPONSE MAX4355 toc96 SWITCHING TIME MAX4355 toc97 INPUT 100mV/div VUPDATE 5V/div OUTPUT 50mV/div VOUT 500mV/div 25ns/div 20ns/div SWITCHING TRANSIENT (GLITCH) MAX4355 toc98 OFFSET VOLTAGE HISTOGRAM MAX4355 toc99 250 200 VUPDATE 5V/div 150 100 VOUT 25mV/div 50 0 20ns/div -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 OFFSET VOLTAGE (mV) DIFFERENTIAL GAIN AND PHASE (RL = 150) MAX4355 toc100 DIFFERENTIAL GAIN AND PHASE (RL = 1k) DIFFERENTIAL GAIN (%) 0.20 0.10 0 -0.10 -0.20 0 10 20 30 40 50 60 70 80 90 100 0.06 0.04 0.02 0 -0.02 0 10 20 30 40 50 60 70 80 90 100 IRE MAX4355 toc101 DIFFERENTIAL GAIN (%) DIFFERENTIAL PHASE () 0.30 0.20 0.10 0 -0.10 0 10 20 30 40 50 60 70 80 90 100 0.3 0.2 0.1 0 -0.1 0 10 20 30 40 50 60 70 80 90 100 IRE 26 ______________________________________________________________________________________ DIFFERENTIAL PHASE () 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Typical Operating Characteristics--Single Supply +5V (continued) (VCC = +5V and VEE = 0, VDD = +5V, AGND = DGND = 0, VIN_ = 0, RL = 150 to AGND, AV = +1V/V, and TA = +25C, unless otherwise noted.) LARGE-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF) MEDIUM-SIGNAL PULSE RESPONSE WITH CAPACITIVE LOAD (CL = 30pF) MAX4355 toc103 MAX4355 toc102 INPUT 1V/div INPUT 100mV/div OUTPUT 0.5V/div OUTPUT 50mV/div 25ns/div 25ns/div GAIN vs. TEMPERATURE MAX4355 toc104 RESET DELAY vs. RESET CAPACITANCE 1 100m RESET DELAY (s) 10m 1m 100 10 1 100n 10n MAX4355 toc105 0.20 0.15 NORMALIZED GAIN (dB) 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 75 10 100 1p 10p 100p 1n 10n 100n 1 10 100 CRESET (F) TEMPERATURE (C) ______________________________________________________________________________________ 27 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Pin Description PIN 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 2, 4, 6, 8, 10, 12, 14, 16, 45, 46, 82, 83, 84, 91, 93, 95, 97 18, 20, 22, 24 25, 47, 51, 55, 59, 63, 67, 71, 75, 81 26, 27, 38-44, 76, 77, 85-89, 99, 100 NAME FUNCTION IN4-IN15 Buffered Analog Inputs AGND Analog Ground A3-A0 V CC Address Programming Inputs. Connect to DGND or V DD to select the address for Individual Output Address Mode (see Table 3). Positive Analog Supply. Bypass each pin with a 0.1F capacitor to AGND. Connect a single 10F capacitor from one V CC pin to AGND. No Connection. Not internally connected. Connect to AGND. N.C. 28 DOUT Serial Data Output. In Complete Matrix Mode, data is clocked through the 96-bit Matrix Control shift register. In Individual Output Address Mode, data at DIN passes directly to DOUT. Digital Ground Address Recognition Output. AOUT drives low after successful chip address recognition. Serial Clock Input Clock Enable Input. Drive low to enable the serial data interface. Serial Interface Mode Select Input. Drive high for Complete Matrix Mode (Mode 1) or drive low for Individual Output Address Mode (Mode 0). Asynchronous Reset Input/Output. Drive RESET low to initiate hardware reset. All matrix settings are set to power up defaults and all analog outputs are disabled. Additional power-on-reset delay may be set by connecting a small capacitor from RESET to DGND. Update Input. Drive UPDATE low to transfer data from mode registers to the switch matrix. Serial Data Input. Data is clocked in on the falling edge of SCLK. Digital Logic Supply. Bypass VDD with a 0.1F capacitor to DGND. Buffered Analog Outputs. Gain is individually programmable for A V = +1V/V or A V = +2V/V through the serial interface. Outputs may be individually disabled (high impedance). On power-up, or assertion of RESET, all outputs are disabled. Negative Analog Supply. Bypass each pin with a 0.1F capacitor to AGND. Connect a single 10F capacitor from one V EE pin to AGND. Buffered Analog Inputs 29 30 31 32 33 DGND AOUT SCLK CE MODE 34 RESET 35 36 37 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 78, 80 49, 53, 57, 61, 65, 69, 73, 79, 98 90, 92, 94, 96 UPDATE DIN V DD OUT15-OUT0 V EE IN0-IN3 28 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Functional Diagram MAX4355 MAX4355 IN0 AV* ENABLE/DISABLE OUT0 IN1 16 x 16 SWITCH MATRIX AV* OUT1 IN2 AV* OUT2 IN15 RESET POWER-ON RESET THERMAL SHUTDOWN AV* OUT15 DISABLE ALL OUTPUTS DIN SCLK UPDATE CE 256 16 16 VCC VEE AGND VDD DGND DOUT DECODE LOGIC SERIAL INTERFACE LATCHES MATRIX REGISTER 96 BITS UPDATE REGISTER 16 BITS AOUT A0-A3 MODE *AV = +1V/V OR +2V/V Detailed Description The MAX4355 is a highly integrated 16 16 nonblocking video crosspoint switch matrix. All inputs and outputs are buffered, with all outputs able to drive standard 75 reverse-terminated video loads. A 3-wire interface programs the switch matrix and initializes with a single update signal. The unique serial interface operates in one of two modes: Complete Matrix Mode (Mode 1) or Individual Output Address Mode (Mode 0). In the Functional Diagram, the signal path of the MAX4355 is from the inputs (IN0-IN15), through the switching matrix, buffered by the output amplifiers, and presented at the output terminals (OUT0-OUT15). The other functional blocks are the serial interface and control logic. Each of the functional blocks is described in detail below. mized to maximize the bandwidth for each gain selection. Each output can be individually enabled and disabled through bit 5 of the serial control word. When disabled, the output is high impedance, presenting typically a 4k load, and 3pF output capacitance, allowing multiple outputs to be connected together in building large arrays. On power-up (or asynchronous RESET), all outputs are initialized in the disabled state to avoid output conflicts in large-array configurations. The programming and operation of the MAX4355 is output referred. Outputs are configured individually to connect to any one of the 16 analog inputs, programmed to the desired gain (AV = +1V/V or +2V/V), or disabled in a high-impedance state. Analog Inputs The MAX4355 offers 16 analog input channels. Each input is buffered before the crosspoint switch matrix, allowing one input to cross-connect to up to 16 outputs. The input buffers are voltage feedback amplifiers with high-input impedance and low-input bias current. This allows the use of very simple input clamp circuits. Analog Outputs The MAX4355 outputs are high-speed voltage feedback amplifiers capable of driving 150 (75 back-terminated) loads. The gain, A V = +1V/V or +2V/V, is selectable through programming bit 4 of the serial control word. Amplifier compensation is automatically opti- ______________________________________________________________________________________ 29 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Table 1. Operation Truth Table CE 1 UPDATE X SCLK X DIN X DOUT X MODE X AOUT X RESET 1 OPERATION/COMMENTS No change in logic. Data at DIN is clocked on the negative edge of the SCLK into the 96-bit Complete Matrix Mode register. DOUT supplies original data in 96 SCLK pulses later. Data in the serial 96-bit Complete Matrix Mode register is transferred into parallel latches that control the switching matrix. Data at DIN is routed to the Individual Output Address Mode shift register. DIN is also connected directly to DOUT so that all devices on the serial bus may be addressed in parallel. The 4-bit chip address A3 to A0 is compared to D13 to D10. If equal, the remaining 10 bits in the Individual Output Address Mode register are decoded, allowing reprogramming for a single output. AOUT signals a successful individual matrix update. Asynchronous reset. All outputs are disabled. Other logic remains unchanged. 0 1 Di Di-96 1 1 1 0 0 X X X 1 1 1 0 1 Di Di 0 1 1 0 0 X Di Di 0 0 1 X X X X X X X 0 Switch Matrix The MAX4355 has 256 individual T-switches making a 16 x 16 switch matrix. The switching matrix is 100% nonblocking, which means that any input may be routed to any output. The switch matrix programming is output referred. Each output may be connected to any one of the 16 analog inputs. Any one input can be routed to all 16 outputs with no signal degradation. The falling edge of UPDATE latches the data and programs the matrix. When using Individual Output Address Mode, the address recognition output AOUT drives low when control word bits D13 to D10 match the address programming inputs (A3-A0) and UPDATE is low. Table 1 is the operation truth table. Programming the Matrix The MAX4355 offers two programming modes: Individual Output Address Mode and Complete Matrix Mode. These two distinct programming modes are selected by toggling a single MODE pin high or low. Both modes operate with the same physical board layout. This flexibility allows initial programming of the IC by daisy-chaining and sending one long data word while still being able to address immediately and update individual outputs in the matrix. Individual Output Address Mode (MODE = 0) Drive MODE to logic low to select mode 0. Individual outputs are programmed through the serial interface Digital Interface The digital interface consists of the following pins: DIN, DOUT, SCLK, AOUT, UPDATE, CE, A3-A0, MODE, and RESET. DIN is the serial data input; DOUT is the serial data output. SCLK is the serial data clock that clocks data into the Data Input registers (Figure 2). Data at DIN is loaded at each falling edge of SCLK. DOUT is the data shifted out of the 96-bit Complete Matrix Mode (Mode = 1). DIN passes directly to DOUT when in Individual Output Address Mode (Mode = 0). 30 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Table 2. 16-Bit Serial Control Word Bit Assignments (Mode 0: Individual Output Address Mode) BIT 0 (LSB) 1 2 3 NAME Input Address 0 Input Address 1 Input Address 2 Input Address 3 MSB of input channel select address Gain Select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V Enable bit for output, 0 = disable, 1 = enable LSB of output buffer address 0 0 0 0 0 0 0 0 1 1 1 1 MSB of output buffer address LSB of selected chip address 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 FUNCTION LSB of input channel select address Table 3. Chip Address Programming for 16-Bit Control Word (Mode 0: Individual Output Address Mode) IC ADDRESS BIT A3 (MSB) A0 (LSB) ADDRESS CHIP ADDRESS (HEX) 0h 1h 2h 3h 4h 5h 6h 7h 8h 9h Ah Bh Ch Dh Eh Fh CHIP ADDRESS (DECIMAL) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A2 A1 4 Gain Set 5 6 7 8 9 10 11 12 13 14 15 (MSB) Output Enable Output Address B0 Output Address B1 Output Address B2 Output Address B3 IC Address A0 IC Address A1 IC Address A2 IC Address A3 X X MSB of selected chip address Don't care Don't care first 6-bit control word (MSBs) programs output 15, and the last 6-bit control word (LSBs) programs output 0 (Table 7 and Figures 4 and 5). Data clocked into the 96-bit Complete Matrix Mode register is latched on the falling edge of UPDATE, and the outputs are immediately updated. Initialization String The Complete Matrix Mode (Mode = 1) is convenient to use to program the matrix at power-up. In a large matrix consisting of many MAX4355 devices, all the devices can be programmed by sending a single bit stream equal to n x 96 bits, where n is the number of MAX4355 devices on the bus. The first 96-bit data word programs the last MAX4355 in line (see Matrix Programming section). with a single 16-bit control word. The control word consists of two don't care MSBs, the chip address bits, output address bits, an output enable/disable bit, an output gain-set bit, and input address bits (Tables 2 through 6, and Figure 2). In mode 0, data at DIN passes directly to DOUT through the data routing gate (Figure 3). In this configuration, the 16-bit control word is simultaneously sent to all chips in an array of up to 16 addresses. Complete Matrix Mode (MODE = 1) Drive MODE to logic high to select mode 1. A single 96-bit control word consisting of sixteen 6-bit control words programs all outputs. The 96-bit control word's RESET The MAX4355 features an asynchronous bidirectional RESET with an internal 20k pullup resistor to VDD. When RESET is pulled low, either by internal circuitry, or driven externally, the analog output buffers are latched into a high-impedance state. After RESET is 31 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 16-BIT INDIVIDUAL OUTPUT ADDRESS MODE: FIRST 2 BITS ARE DON'T CARE BITS, LAST 14 BITS CLOCKED INTO DIN WHEN MODE = 0 CREATE ADDRESS WORD; IC ADDRESS A3-A0 IS COMPARED TO DIN13-DIN10 WHEN UPDATE IS LOW; IF EQUAL, ADDRESSED OUTPUT IS UPDATED. UPDATE MODE tSuMd tHdMd SCLK DIN INPUT ADDRESS 3 (MSB) = 1 INPUT ADDRESS 0 (LSB) = 0 INPUT ADDRESS 2 = 1 INPUT ADDRESS 1 = 0 IC ADDRESS A3 IC ADDRESS A2 IC ADDRESS A1 IC ADDRESS A0 OUTPUT ADDRESS B3 OUTPUT ADDRESS B2 OUTPUT ADDRESS B1 OUTPUT ADDRESS B0 DON'T CARE X DON'T CARE X OUTPUT ENABLED GAIN SET = +1V/V IC ADDRESS = 5 OUTPUT ADDRESS = 3 OUTPUT (i) ENABLED, AV = +1V/V, CONNECTED TO INPUT 12 EXAMPLE OF 16-BIT SERIAL CONTROL WORD FOR OUTPUT CONTROL IN INDIVIDUAL OUTPUT ADDRESS MODE Figure 2. Mode 0: Individual Output Address Mode Timing and Programming Example Table 4. Chip Address A3-A0 Pin Programming PIN ADDRESS CHIP CHIP ADDRESS ADDRESS (HEX) (DECIMAL) 0h 1h 2h 3h 4h 5h 6h 7h 8h 9h Ah Bh Ch Dh Eh Fh 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table 5. Output Selection Programming OUTPUT ADDRESS BIT B3 (MSB) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 B2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 B0 (LSB) 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 SELECTED OUTPUT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 A3 DGND DGND DGND DGND DGND DGND DGND DGND VDD VDD VDD VDD VDD VDD VDD VDD A2 DGND DGND DGND DGND VDD VDD VDD VDD DGND DGND DGND DGND VDD VDD VDD VDD A1 DGND DGND VDD VDD DGND DGND VDD VDD DGND DGND VDD VDD DGND DGND VDD VDD A0 DGND VDD DGND VDD DGND VDD DGND VDD DGND VDD DGND VDD DGND VDD DGND VDD 32 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 SCLK CE MODE 4 16-BIT INDIVIDUAL OUTPUT ADDRESS MODE REGISTER SCLK CE MODE 10 A MODE S DATA ROUTING GATE A0-A3 CHIP ADDRESS 4 DOUT DIN 10 96-BIT COMPLETE MATRIX MODE REGISTER 96 MODE OUTPUT ADDRESS DECODE 7 MODE B 1 UPDATE EN 7 AOUT 96 96-BIT PARALLEL LATCH 96 SWITCH DECODE 256 SWITCH MATRIX 16 OUTPUT ENABLE Figure 3. Serial Interface Block Diagram Table 6. Input Selection Programming INPUT ADDRESS BIT B3 (MSB) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 B0 (LSB) 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 SELECTED INPUT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Table 7. 6-Bit Serial Control Word Bit Assignments (Mode 1: Complete Matrix Mode) BIT 5 (MSB) 4 3 2 1 0 (LSB) NAME Output Enable Gain Set Input Address 3 Input Address 2 Input Address 1 Input Address 0 LSB of input channel select address FUNCTION Enable bit for output, 0 = disable, 1 = enable Gain Select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V MSB of input channel select address B2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 ______________________________________________________________________________________ 33 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 tMnLCk SCLK tSuDi DIN tHdDi tMnHCk tSuHUd UPDATE tPdDo tMnLUd DOUT SCLK EXAMPLE OF 6-BIT SERIAL CONTROL WORD FOR OUTPUT CONTROL NEXT CONTROL WORD DIN GAIN SET = +1V/V INPUT ADDRESS 2 = 1 INPUT ADDRESS 3 (MSB) = 1 INPUT ADDRESS 1 = 1 16 x 16 CROSSPOINT = 6-BIT CONTROL WORD OUTPUT (i) ENABLED, AV = +1V/V, CONNECTED TO INPUT 14 Figure 4. 6-Bit Control Word and Programming Example (Mode 1: Complete Matrix Mode Programming) UPDATE 1 0 MODE 1 6-BIT CONTROL WORD 0 DIN OUT2 OUT1 MOST-SIGNIFICANT OUTPUT BUFFER CONTROL BITS ARE SHIFTED IN FIRST, I.E., OUT15, THEN OUT14, ETC. LAST 6 BITS SHIFTED IN PRIOR TO UPDATE NEGATIVE EDGE PROGRAM OUT0. Figure 5. Mode 1: Complete Matrix Mode Programming 34 ______________________________________________________________________________________ INPUT ADDRESS 0 (LSB) = 0 OUTPUT ENABLED OUT0 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers released, the output buffers remain disabled. The outputs may be enabled by sending a new 96-bit data word or a 16-bit individual output address word. A reset is initiated from any of three sources. RESET can be driven low by external circuitry to initiate a reset, or RESET can be pulled low by internal circuitry during power-up (power-on reset) or thermal shutdown. Since driving RESET low only clears the output buffer enable bit in the matrix control latches, RESET can be used to disable all outputs simultaneously. If no new data has been loaded into the 96-bit complete matrix mode register, a single UPDATE restores the previous matrix control settings. ance output state. This disable state of the output buffers is designed for a maximum impedance vs. frequency while maintaining a low-output capacitance. These characteristics minimize the adverse loading effects from the disabled outputs. Larger arrays are constructed by extending this connection technique to more devices. MAX4355 Driving a Capacitive Load Figure 6 shows an implementation requiring many outputs to be wired together. This creates a situation where each output buffer sees not only the normal load impedance, but also the disabled impedance of all the other outputs. This impedance has a resistive and a capacitive component. The resistive components reduce the total effective load for the driving output. Total capacitance is the sum of the capacitance of all the disabled outputs and is a function of the size of the matrix. Also, as the size of the matrix increases, the length of the PC board traces increases, adding more capacitance. The output buffers have been designed to drive more than 30pF of capacitance while still maintaining a good AC response. Depending on the size of the array, the capacitance seen by the output can exceed this amount. There are several ways to improve the situation. The first is to use more building-block crosspoint devices to reduce the number of outputs that need to be wired together (Figure 7). In Figure 7, the additional devices are placed in a second bank to multiplex the signals. This reduces the number of wired-OR connections. Another solution is to put a small resistor in series with the output before the capacitive load to limit excessive ringing and oscillations. Figure 8 shows the graph of the Optimal Isolation Resistor vs. Capacitive Load. A lowpass filter is created from the series resistor and parasitic capacitance to ground. A single R-C does not affect the performance at video frequencies, but in a very large system there may be many R-Cs cascaded in series. The cumulative effect is a slight rolling off of the high frequencies causing a "softening" of the picture. There are two solutions to achieve higher performance. One way is to design the PC board traces associated with the outputs such that they exhibit some inductance. By routing the traces in a repeating "S" configuration, the traces that are nearest each other exhibit a mutual inductance increasing the total inductance. This series inductance causes the amplitude response to increase or peak at higher frequencies, offsetting the rolloff from the parasitic capacitance. Another solution is to add a small-value inductor to the output. Power-On Reset The power-on reset ensures all output buffers are in a disabled state when power is initially applied. A VDD voltage comparator generates the power-on reset. When the voltage at VDD is less than 2.5V, the poweron-reset comparator pulls RESET low through internal circuitry. As the digital supply voltage ramps up crossing 2.5V, the MAX4355 holds RESET low for 40ns (typ). Connecting a small capacitor from RESET to DGND extends the power-on-reset delay. See RESET Delay vs. RESET Capacitance in the Typical Operating Characteristics. Thermal Shutdown The MAX4355 features thermal shutdown protection with temperature hysteresis. When the die temperature exceeds +150C, the MAX4355 pulls RESET low, disabling the output buffers. When the die cools by 20C, the RESET pulldown is deasserted, and output buffers remain disabled until the device is programmed again. Applications Information Building Large Video-Switching Systems The MAX4355 can be easily used to create larger switching matrices. The number of ICs required to implement the matrix is a function of the number of input channels, the number of outputs required, and whether the array needs to be nonblocking. The most straightforward technique for implementing nonblocking matrices is to arrange the building blocks in a grid. The inputs connect to each vertical bank of devices in parallel with the other banks. The outputs of each building block in a vertical column connect together in a wired-OR configuration. Figure 6 shows a 128-input, 32-output, nonblocking array using the MAX4355 16 x 16 crosspoint devices. The wired-OR connection of the outputs shown in the diagram is possible because the outputs of the IC devices can be placed in a disabled or high-imped- ______________________________________________________________________________________ 35 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT 16 IN 16 MAX4355 OUT IN (0-15) IN (64-79) IN (16-31) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT IN (80-95) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT IN (32-47) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT IN (96-111) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT IN (48-63) 16 IN 16 MAX4355 OUT 16 16 IN MAX4355 OUT IN (112-127) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT OUTPUTS (0-15) OUTPUTS (16-32) Figure 6. 128 x 32 Nonblocking Matrix Using 16 x 16 Crosspoint Devices Crosstalk Signal and Board Routing Issues Improper signal routing causes performance problems such as crosstalk. The MAX4355 has a typical crosstalk rejection of -62dB at 6MHz. A bad PC board layout degrades the crosstalk rejection by 20dB or more. To achieve the best crosstalk performance: 1) Place ground isolation between long critical signal PC board trace runs. These traces act as a shield to potential interfering signals. Crosstalk can be degraded by parallel traces as well as directly above and below on adjoining PC board layers. 2) Maintain controlled-impedance traces. Design as many of the PC board traces as possible to be 75 transmission lines. This lowers the impedance of the traces, reducing a potential source of crosstalk. More power is dissipated due to the output buffer driving a lower impedance. 3) Minimize ground-current interaction by using a good ground plane strategy. In addition to crosstalk, another key issue of concern is isolation. Isolation is the rejection of undesirable feedthrough from input to output with the output disabled. The MAX4355 achieves a -110dB isolation at 6MHz by selecting the pinout configuration such that the inputs and outputs are on opposite sides of the package. Coupling through the power supply is a function of the quality and location of the supply bypassing. Use appropriate low-impedance components and locate them as close as possible to the IC. Avoid routing the inputs near the outputs. 36 IN (0-15) 16 16 IN MAX4355 OUT IN (16-31) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT IN (32-47) 16 16 IN MAX4355 OUT 16 16 IN MAX4355 OUT OUTPUTS (0-15) IN (48-63) 16 16 IN MAX4355 OUT Figure 7. 64 x 16 Nonblocking Matrix with Reduced Capacitive Loading Power-Supply Bypassing The MAX4355 operates from a single +5V or dual 3V to 5V supplies. For single-supply operation, connect all VEE pins to ground and bypass all power-supply pins with a 0.1F capacitor to ground. For dual-supply systems, bypass all supply pins to ground with 0.1F capacitors. Power in Large Systems The MAX4355 has been designed to operate with split supplies down to 3V or a single supply of +5V. Operating at the minimum supply voltages reduces the ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers power dissipation by as much 40% to 50%. At +5V, the MAX4355 consumes 195mW (0.76mW/point). MAX4355 OPTIMAL ISOLATION RESISTANCE vs. CAPACITIVE LOAD 30 25 20 15 10 5 0 0 100 200 300 400 500 CAPACITIVE LOAD (pF) Driving a PC Board Interconnect or a Cable (AV = +1V/V or +2V/V) The MAX4355 output buffers can be programmed to either AV = +1V/V or +2V/V. The +1V/V configuration is typically used when driving a short-length (less than 3cm), high-impedance "local" PC board trace. To drive a cable or a 75 transmission line trace, program the gain of the output buffer to +2V/V and place a 75 resistor in series with the output. The series termination resistor and the 75 load impedance act as a voltagedivider that divides the video signal in half. Set the gain to +2V/V to transmit a standard 1V video signal down a cable. The series 75 resistor is called the back-match, reverse termination, or series termination. This 75 resistor reduces reflections, and provides isolation, increasing the output-capacitive-driving capability. ISOLATION RESISTANCE () Figure 8. Optimal Isolation Resistor vs. Capacitive Load Matrix Programming The MAX4355's unique digital interface simplifies programming multiple MAX4355 devices in an array. Multiple devices are connected with DOUT of the first device connecting to DIN of the second device, and so on (Figure 9). Two distinct programming modes, individual output address mode (MODE = 0) and complete matrix mode (MODE = 1), are selected by toggling a single MODE control pin high or low. Both modes operate with the same physical board layout. This allows initial programming of the IC by daisy-chaining and sending one long data word while still being able to address immediately and update individual locations in the matrix. Individual Output Address Mode (Mode 0) In Individual Output Address Mode, the devices are connected in a serial bus configuration, with the data routing gate (Figure 3) connecting DIN to DOUT, making each device a virtual node on the serial bus. A single 16-bit control word is sent to all devices simultaneously. Only the device with the corresponding chip address responds to the programming word, and updates its output. In this mode, the chip address is set through hardware pin strapping of A3-A0. The host then communicates with the device by sending a 16-bit word consisting of 2 don't care MSB bits, 4 chip address bits, and 10 bits of data to make the word exactly 2 bytes in length. The 10 data bits are broken down into 4 bits to select the output to be programmed; 1 bit to set the output enable; 1 bit to set gain; and 4 bits to select the input to be connected to that output. In this method, the matrix is programmed one output at a time. Complete Matrix Mode (Mode 1) In Complete Matrix Mode, the devices are connected in a daisy-chain fashion where n x 96 bits are sent to program the entire matrix, and where n = the number of MAX4355 devices connected in series. This long data word is structured such that the first bit is the LSB of the last device in the chain and the last data bit is the MSB of the first device in the chain. The total length of the data word is equal to the number of crosspoint devices to be programmed in series times 96 bits per crosspoint device. This programming method is most often used at startup to initially configure the switching matrix. +5V Single-Supply Operation with AV = +1V/V and +2V/V The MAX4355 guarantees operation with single +5V supply and gain of +1V/V for standard video input signals (1Vp-p). To implement a complete video matrix switching system capable of gain = +2V/V while operating with +5V single supply, combine the MAX4355 crosspoint switch with Maxim's low-cost, high-performance video amplifiers optimized for single +5V supply operation (Figure 10). The MAX4450 single and MAX4451 dual op amps are unity-gain-stable devices that combine high-speed performance with Rail-toRail(R) outputs. The common-mode input voltage range extends beyond the negative power-supply rail (ground in single-supply applications). The MAX4450 is available in the ultra-small 5-pin SC70 package, while the MAX4451 is available in a space-saving 8-pin SOT23. The MAX4383 is a quad op amp available in a 14-pin Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. 37 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 CHIP ADDRESS = 0 CHIP ADDRESS = 1 CHIP ADDRESS = 2 DIN HOST CONTROLLER DOUT DIN DOUT DIN DOUT NEXT DEVICE MAX4355 A3 SCLK CE MODE UPDATE A2 A1 A0 MAX4355 A3 SCLK CE MODE UPDATE A2 A1 A0 VDD MAX4355 A3 SCLK CE MODE UPDATE A2 A1 A0 VDD VIRTUAL SERIAL BUS (MODE 0: INDIVIDUAL OUTPUT ADDRESS MODE) Figure 9. Matrix Mode Programming +5V VCC OUT0 IN0 IN1 OUT15 IN15 OUT1 1Vp-p +5V 2Vp-p U2 75 220F 75 MONITOR 0 Z0 = 75 500 500 MAX4355 U2 = MAX4450 OR 1/4 MAX4383 GND VEE Figure 10. Typical Single +5V Supply Application TSSOP package. The MAX4380/MAX4381/MAX4382 and MAX4384 offer individual high-impedance output disable making these amplifiers suitable for wired-OR connections. Chip Information TRANSISTOR COUNT: 24,467 PROCESS: BiCMOS 38 ______________________________________________________________________________________ 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers Pin Configuration TOP VIEW AGND AGND AGND AGND AGND AGND AGND OUT0 OUT1 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. VCC VEE VEE IN3 IN2 IN1 IN0 MAX4355 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 IN4 AGND IN5 AGND IN6 AGND IN7 AGND IN8 AGND IN9 AGND IN10 AGND IN11 AGND IN12 A3 IN13 A2 IN14 A1 IN15 A0 VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 75 74 73 72 71 70 69 68 67 66 65 VCC OUT2 VEE OUT3 VCC OUT4 VEE OUT5 VCC OUT6 VEE OUT7 VCC OUT8 VEE OUT9 VCC OUT10 VEE OUT11 VCC OUT12 VEE OUT13 VCC MAX4355 64 63 62 61 60 59 58 57 56 55 54 53 52 51 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 VEE 26 27 28 29 30 OUT15 UPDATE TQFP ______________________________________________________________________________________ OUT14 DOUT DGND AOUT SCLK CE MODE RESET DIN AGND AGND N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. VDD VCC 50 39 16 x 16 Nonblocking Video Crosspoint Switch with I/O Buffers MAX4355 Package Information 100L,TQFP.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 40 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
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