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IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
FEATURES:
* * * * * * * * * * *
IDT74FCT166245T/AT
0.5 MICRON CMOS Technology High-speed, low-power CMOS replacement for ABT functions Typical tSK(o) (Output Skew) < 250ps Low input and output leakage 1A (max.) ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) Light drive A port: 8mA High drive B port: +64mA, -32mA Minimal system switching noise Typical VOLP (Output Ground Bounce) < 0.25V at VCC = 5V, TA = 25C (A port switching) Power off disable outputs permit "live insertion" Available in SSOP and TSSOP packages
DESCRIPTION:
The FCT166245T 16-bit transceiver is built using advanced dual metal CMOS technology. These high-speed, low-power transceivers are ideal for synchronous communication between two buses (A and B). The Direction and Output Enable controls operate these devices as either two independent 8-bit transceivers or one 16-bit transceiver. The direction control pin (xDIR) controls the direction of data flow. The output enable pin (xOE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin. The FCT166245T is suited for very low noise, point-to-point driving where there is a single receiver, or a light lumped load (<100pF). The buffers are designed to limit the output current to levels which will avoid noise and ringing on the signal lines without using external series terminating resistors. These parts have a 8mA driver on the "A" Port and a +64/-32mA driver on the "B" Port, making them ideal for interfacing noisy system busses to noise sensitive interfaces.
FUNCTIONAL BLOCK DIAGRAM
1 2
DIR
1O 1A 1 1A 2 1A 3 1A 4 1A 5 1A 6 1A 7 1A 8
DIR
2O 2A 1 2A 2 2A 3 2A 4 2A 5 2A 6 2A 7 2A 8
E
1B 1 1B 2 1B 3 1B 4 1B 5 1B 6 1B 7 1B 8
E
2B 1 2B 2 2B 3 2B 4 2B 5 2B 6 2B 7 2B 8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
2001 Integrated Device Technology, Inc.
MAY 2001
DSC-5458/1
IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
1DIR 1B1 1B2
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Terminal Voltage with Respect to GND Storage Temperature DC Output Current Max -0.5 to +7 -0.5 to VCC+0.5 -65 to +150 -60 to +120 Unit V V C mA
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
VTERM(2)
1OE 1A1 1A2
VTERM(3) Terminal Voltage with Respect to GND TSTG IOUT
GND
1B3 1B4
GND
1A3 1A4
VCC
1B5 1B6
VCC
1A5 1A6
NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. All device terminals except FCT162XXX and FCT166XXXT(A port) Output and I/O terminals. 3. Output and I/O terminals for FCT162XXX and FCT166XXXT(A port).
GND
1B7 1B8 2B1 2B2
GND
1A7 1A8 2A1 2A2
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN COUT Parameter(1) Input Capacitance Output Capacitance Conditions VIN = 0V VOUT = 0V Typ. 3.5 3.5 Max. 6 8 Unit pF pF
NOTE: 1. This parameter is measured at characterization but not tested.
GND
2B3 2B4
GND
2A3 2A4
PIN DESCRIPTION
Pin Names xOE xDIR xAx xBx Description 3-State Output Enable Inputs (Active LOW) Direction Control Input Side A Inputs or 3-State Outputs(1) Side A Inputs or 3-State Outputs(2)
VCC
2B5 2B6
VCC
2A5 2A6
GND
2B7 2B8 2DIR
GND
2A7 2A8 2OE
NOTES: 1. This is the 8mA port. 2. This is the +64/-32mA port.
FUNCTION TABLE(1)
Inputs xOE L L H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance
SSOP/ TSSOP TOP VIEW
DIR L H X
Outputs Bus B Data to Bus A Bus A Data to Bus B Z
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IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 10%
Symbol VIH VIL IIH IIL IOZH IOZL VIK IOS VH ICCL ICCH ICCZ Parameter Input HIGH Level Input LOW Level Input HIGH Current (Input pins)(5) Input HIGH Current (I/O pins)(5) Input LOW Current (Input pins)(5) Input LOW Current (I/O pins)(5) High Impedance Output Current (3-State Output pins)(5) Clamp Diode Voltage Short Circuit Current Input Hysteresis Quiescent Power Supply Current VCC = Max. VIN = GND or VCC VCC = Min., IIN = -18mA VCC = Max., VO = GND(3) -- VCC = Max. VO = 2.7V VO = 0.5V VI = GND Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VI = VCC Min. 2 -- -- -- -- -- -- -- -- -80 -- -- Typ.(2) -- -- -- -- -- -- -- -- -0.7 -140 100 5 Max. -- 0.8 1 1 1 1 1 1 -1.2 -250 -- 500 V mA mV A A Unit V V A
OUTPUT DRIVE CHARACTERISTICS (A-PORT)
Symbol IODL IODL VOH VOH Parameter Output LOW Current Output HIGH Current Output HIGH Voltage Output LOW Voltage Test Conditions(1) VCC = 5V, VIN = VIH or VIL, VO = 1.5V(3) VCC = 5V, VIN = VIH or VIL, VO = 1.5V(3) VCC = Min. IOH = -8mA VIN = VIH or VIL VCC = Min. IOL = 8mA VIN = VIH or VIL Min. 16 -16 2.4 -- Typ.(2) 48 -48 3.3 0.3 Max. 96 -96 -- 0.55 Unit mA mA V V
OUTPUT DRIVE CHARACTERISTICS (B-PORT)
Symbol IO VOH Parameter Output Drive Current Output HIGH Voltage VCC = Max., VO = VCC = Min. VIN = VIH or VIL VCC = Min. VIN = VIH or VIL VCC = 0V, VIN or VO 4.5V Test Conditions(1) 2.5V(3) IOH = -3mA IOH = -15mA IOH = -32mA(4) IOL = 64mA Min. -50 2.5 2.4 2 -- -- Typ.(2) -- 3.5 3.5 3 0.2 -- Max. -180 -- -- -- 0.55 1 Unit mA V V A
VOH IOFF
Output LOW Voltage Input/Output Power Off Leakage
NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. Duration of the condition can not exceed one second. 5. The test limit for this parameter is 5A at TA = -55C.
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IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Test Conditions(1) VCC = Max. VIN = 3.4V(3) VCC = Max., Outputs Open xOE = xDIR = GND One Input Toggling 50% Duty Cycle VCC = Max., Outputs Open fi = 10MHz 50% Duty Cycle xOE = xDIR = GND One Bit Toggling VCC = Max., Outputs Open fi = 2.5MHz 50% Duty Cycle xOE = xDIR = GND Sixteen Bits Toggling Min. -- -- Typ.(2) 0.5 60 Max. 1.5 100 Unit mA A/ MHz
VIN = VCC VIN = GND
IC
Total Power Supply Current(6)
VIN = VCC VIN = GND VIN = 3.4V VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND
--
0.6
1.5
mA
--
0.9
2.3
--
2.4
4.5(5)
--
6.4
16.5(5)
NOTES: 1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested. 6. IC = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCPNCP/2 + fiNi) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fi = Input Frequency Ni = Number of Inputs at fi
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IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT166245T Symbol tPLH tPHL tPLH tPHL tPZH tPZL tPZH tPZL tPHZ tPLZ tPHZ tPLZ tPZH tPZL tPZH tPZL tPHZ tPLZ tPHZ tPLZ tSK(o) Parameter Propagation Delay A to B Propagation Delay B to A Output Enable Time xOE to B Output Enable Time xOE to A Output Disable Time xOE to B Output Disable Time xOE to A Output Enable Time DIR to B(3) Output Enable Time DIR to A(3) Output Disable Time DIR to B(3) Output Disable Time DIR to A(3) Output Skew(4) Condition(1) CL = 50pF RL = 500 Min.(2) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 -- Max. 4.6 7 6.2 9.5 5 7.5 6.2 9.5 5 7.5 0.5 FCT166245AT Min.(2) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 -- Max. 4.1 4.6 5.8 6.2 4.8 5 5.8 6.2 4.8 5 0.5 Unit ns ns ns ns ns ns ns ns ns ns ns
NOTES: 1. See test circuits and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not tested. 4. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
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IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V CC 7.0V 500 V IN Pulse Generator D.U.T. 50pF RT 500 CL V OUT
SWITCH POSITION
Test Open Drain Disable Low Enable Low All Other Tests Switch Closed Open
DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
Test Circuits for All Outputs
DATA INPUT tSU TIM ING INPUT ASYNCHRONOUS CONTROL PRES ET CLEA R ETC. SYNCHRONOUS CONTROL PRES ET CLEA R CLOCK ENABLE ETC. tREM
tH
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
LOW -HIGH-LOW PULSE tW HIGH-LOW -HIGH PULSE
1.5V
1.5V
tSU
tH
Pulse Width
Set-up, Hold, and Release Times
ENABLE SAM E PHASE INPUT TRANSITION tPLH OUTPUT tPLH OPPOSITE P HASE INPUT TRANSITION tPHL tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V DISABLE 3V CONTROL INPUT tPZL OUTPUT NORM ALLY LOW SW ITCH CLOSED tPZH OUTPUT NORM ALLY HIGH SW ITCH OPEN 3.5V 1.5V 0.3V tPHZ 0.3V 1.5V 0V 0V VOH tPLZ 1.5V 0V 3.5V VOL
Propagation Delay
Enable and Disable Times
NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2.5ns; tR 2.5ns.
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IDT74FCT166245T/AT FAST CMOS 16-BIT BIDIRECTIONAL TRANSCEIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX FCT XXX Drive XXXX Device Type XX Package
Temp. Range
PV PA
Shrink Small Outline Package Thin Shrink Small Outline Package
245T 245AT
16-Bit Bidirectional Transceiver
166
Double-Density, 5 Volt, Light Drive
74
-40C to +85C
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for Tech Support: logichelp@idt.com (408) 654-6459
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