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ISL54208
Data Sheet December 18, 2006 FN6410.0
Low Voltage, Dual SPDT, USB/CVBS/ Audio Switches, with Negative Signal Capability
The Intersil ISL54208 dual SPDT (Single Pole/Double Throw) switches combine low distortion audio/video and accurate USB 2.0 high speed (480Mbps) data signal switching in the same low voltage device. When operated with a 2.7V to 3.6V single supply these analog switches allow audio/video signal swings below-ground, allowing the use of a common USB and audio/video connector in digital cameras, camcorders and other portable battery powered Personal Media Player devices. The ISL54208 logic control pins are 1.8V logic compatible which allows control via a standard controller. With a VDD voltage in the range of 2.7V to 3.6V the IN pin voltage can exceed the VDD rail allowing for the USB 5V VBUS voltage from a computer to directly drive the IN pin to switch between the audio/video and USB signal sources in the portable device. The part has an enable control pin to open all the switches and put the part in a low power state. The ISL54208 is available in a small 10 Ld 2.1mmx1.6mm ultra-thin TQFN package and a 10 Ld 3mmx3mm TDFN package. It operates over a temperature range of -40 to +85C.
Features
* High Speed (480Mbps) Signaling Capability per USB 2.0 * Low Distortion Negative Signal Capability * Control Pin to Open all Switches and Enter Low Power State * Low Distortion Mono Audio Signal - THD+N at 20mW into 32 Load . . . . . . . . . . . . . <0.1% * Low Distortion Color Video Signal - Differential Gain . . . . . . . . . . . . . . . . . . . . . . . . . . 0.28% - Differential Phase. . . . . . . . . . . . . . . . . . . . . . . . . . 0.04 * Cross-talk NCx Channels (4MHz) . . . . . . . . . . . . . . -78dB * Single Supply Operation (VDD) . . . . . . . . . . . . 1.8V to 5.5V * -3dB Bandwidth USB NOx Switches . . . . . . . . . . . 630MHz * Available in TQFN and TDFN Packages * Pb-Free Plus Anneal (RoHS Compliant) * Compliant with USB 2.0 Short Circuit Requirements Without Additional External Components
Applications
* Digital Camera and Camcorders * Video MP3 and other Personal Media Players
Related Literature
* Technical Brief TB363 "Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)" * Application Note AN557 "Recommended Test Procedures for Analog Switches"
* Cellular/Mobile Phones * PDA's * Audio/Video/USB Switching
Application Block Diagram
VDD IN USB AND AUDIO/VIDEO JACK VBUS
ISL54208
CTRL LOGIC CIRCUITRY
CONTROLLER
4M NO1
COM1
DD+ NO2 50k NC1 NC2
USB HIGH-SPEED TRANSCEIVER
COM2
NTSC or PAL VIDEO
50k
AUDIO
GND
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL54208 Pinouts
(Note 1) ISL54208 (10 LD TQFN) TOP VIEW
CTRL
ISL54208 (10 LD TDFN) TOP VIEW
10
4M 9 8 7 6 50k 50k NO1 NO2
VDD IN COM 1
1 2 3 4 5 50k LOGIC CONTROL
4M
10 9 8 7 6
CTRL NO1 NO2
VDD IN COM 1
1 2 3 4
LOGIC CONTROL
NC1 NC2
COM 2 GND
NC1 NC2
COM 2
50k
5 GND
NOTE: 1. ISL54208 Switches shown for IN = Logic "0" and CTRL = Logic "1".
Truth Table
ISL54208 IN 0 0 1 CTRL 0 1 X NC1, NC2 OFF ON OFF NO1, NO2 OFF OFF ON
Pin Descriptions
ISL54208 PIN NO. 1 2 3 4 5 6 7 8 9 10 NAME VDD IN COM1 COM2 GND NC2 NC1 NO2 NO1 CTRL Power Supply Digital Control Input Voice/Video and USB Common Pin Voice/Video and USB Common Pin Ground Connection Audio or Video Input Audio or Video Input USB Differential Input USB Differential Input Digital Control Input (Audio/Vidio Enable) FUNCTION
IN: Logic "0" when 0.5V, Logic "1" when 1.4V with 2.7V to 3.6V supply. CTRL: Logic "0" when 0.5V or Floating, Logic "1" when 1.4V with 2.7V to 3.6V supply.
Ordering Information
PART NUMBER (Note) ISL54208IRUZ-T ISL54208IRZ-T ISL54208IRZ PART MARKING FR 4208 4208 TEMP. RANGE (C) -40 to +85 -40 to +85 -40 to +85 PACKAGE (Pb-Free) 10 Ld 2.1x1.6mm TQFN Tape and Reel 10 Ld 3mmx3mm TDFN Tape and Reel 10 Ld 3mmx3mm TDFN PKG. DWG. # L10.2.1x1.6A L10.3x3A L10.3x3A
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate or NiPdAu termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
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Absolute Maximum Ratings
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0V Input Voltages NCx, NOx(Note 2) . . . . . . . . . . . . . . . . . . . . -2V to ((VDD) + 0.3V) IN (Note 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V CTRL (Note 2) . . . . . . . . . . . . . . . . . . . . . . -0.3 to ((VDD) + 0.3V) Output Voltages COMx (Note 2) . . . . . . . . . . . . . . . . . . . . . . -2V to ((VDD) + 0.3V) Continuous Current (NCx, COMx) . . . . . . . . . . . . . . . . . . . 150mA Peak Current (NCx, COMx) (Pulsed 1ms, 10% Duty Cycle, Max). . . . . . . . . . . . . . . . 300mA Continuous Current (NOx) . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Peak Current (NOx) (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . . . . . . . . 100mA ESD Rating: HBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >7kV MM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >400V CDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1.4kV
Thermal Information
Thermal Resistance (Typical, Note 3) JA (C/W) 10 Ld TQFN Package . . . . . . . . . . . . . . . . . . . . . . . 130 10 Ld 3x3 TDFN Package. . . . . . . . . . . . . . . . . . . . . 110 Maximum Junction Temperature (Plastic Package) . . . . . . . +150C Maximum Storage Temperature Range. . . . . . . . . . . . -65C to +150C
Operating Conditions
Temperature Range ISL54208IRUZ and ISL54208IRZ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40C to +85C
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTES: 2. Signals on NOx, NCx, COMx, CTRL, IN exceeding VDD or GND by specified amount are clamped. Limit current to maximum current ratings. 3. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,
VCTRLL = 0.5V, (Notes 4, 6), unless otherwise specified. PARAMETER ANALOG SWITCH CHARACTERISTICS Audio/Video Switches (NC1, NC2) Analog Signal Range, VANALOG ON Resistance, RON VDD = 3.0V, IN = 0.5V, CTRL = 1.4V VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 100mA, VNCx = -0.85V to 0.85V, (See Figure 3) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 100mA, VNCx = Voltage at max RON over signal range of -0.85V to 0.85V, (Note 8) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 100mA, VNCx = -0.85V to 0.85V, (Note 7) VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOM- or VCOM+ = -0.85V, 0.85V, VNCx = -0.85V, 0.85V, VNOx = floating, Measure current through the discharge pull-down resistor and calculate resistance value. Full 25 Full 25 Full 25 Full 25 -1.5 2.65 0.02 0.03 50 1.5 4 5.5 0.13 0.16 0.05 0.07 V k TEST CONDITIONS TEMP (C) (NOTE 5) MIN TYP (NOTE 5) MAX UNITS
RON Matching Between Channels, RON RON Flatness, RFLAT(ON)
Discharge Pull-Down Resistance, RNC1, RNC2
USB Switches (NO1, NO2) Analog Signal Range, VANALOG ON Resistance, RON VDD = 3.6V, IN = 1.4V, CTRL = 1.4V VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VNOx = 0V to 400mV (See Figure 4) VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VNOx = Voltage at max RON, (Note 8) VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VNOx = 0V to 400mV, (Note 7) Full 25 Full 25 Full 25 Full 0 4.6 0.06 0.4 VDD 5 6.5 0.5 0.55 0.6 1.0 V
RON Matching Between Channels, RON RON Flatness, RFLAT(ON)
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Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,
VCTRLL = 0.5V, (Notes 4, 6), unless otherwise specified. (Continued) PARAMETER OFF Leakage Current, INOx(OFF) TEST CONDITIONS VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOMx = 0.5V, 0V, VNOx = 0V, 0.5V, VNCx = float VDD = 3.3V, IN = 3.3V, CTRL = 0V or 3.3V, VNOx = 2.0V, VCOMx , VNCx = float TEMP (C) 25 Full 25 Full (NOTE 5) MIN -10 -70 -10 -75 TYP 2 (NOTE 5) MAX UNITS 10 70 10 75 nA nA nA nA
ON Leakage Current, INOx
DYNAMIC CHARACTERISTICS Turn-ON Time, tON Turn-OFF Time, tOFF Break-Before-Make Time Delay, tD Skew, tSKEW VDD = 2.7V, RL = 50, CL = 10pF, (See Figure 1) VDD = 2.7V, RL = 50, CL = 10pF, (See Figure 1) VDD = 2.7V, RL = 50, CL = 10pF, (See Figure 2) VDD = 3.3V, IN = 3.3V, CTRL = 3.3V, RL = 45, CL = 10pF, tR = tF = 750ps at 480Mbps, (Duty Cycle = 50%) (See Figure 7) VDD = 3.3V, IN = 3.3V, CTRL = 3.3V, RL = 45, CL = 10pF, tR = tF = 750ps at 480Mbps VDD = 3.3V, IN = 3.3V, CTRL = 3.3V, RL = 45, CL = 10pF, (See Figure 7) VDD = 3.3V, IN = 0V, CTRL = 3.3V, RL = 75, f = 4MHz, VNCx = 300mVP-P, (See Figure 6) VSIGNAL = 300mVp-p, VOFFSET = 0V to 0.7V, f = 3.58MHz, RL = 75 VSIGNAL = 300mVp-p, VOFFSET = 0V to 0.7V, f = 3.58MHz, RL = 75 f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VNCx = 0.707VRMS (2VP-P), RL = 32 Signal = 8dBm, RL = 75, CL = 5pF, (See Figure 14) 25 25 25 25 67 48 18 50 ns ns ns ps
Total Jitter, tJ Propagation Delay, tPD Crosstalk (Channel-to-Channel), NC2 to COM1, NC1 to COM2 Differential Gain Differential Phase Total Harmonic Distortion NCx (Audio/Video) Switch -3dB Bandwidth
25 25 25 25 25 25 25 25 25 25 25
-
210 250 -78 0.28 0.04 0.06 338 630 6 9 10
-
ps ps dB % deg % MHz MHz pF pF pF
NOx (USB) Switch -3dB Bandwidth Signal = 0dBm, 0.2VDC offset, RL = 50, CL = 5pF NOx OFF Capacitance, CNOx(OFF) f = 1MHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VNOx = VCOMx = 0V, (See Figure 5) NCx OFF Capacitance, CNCx(OFF) f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 3.0V, VNCx = VCOMx = 0V, (See Figure 5) COMx ON Capacitance, CCOMx(ON) f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 3.0V, VNOx = VCOMx = 0V, (See Figure 5) POWER SUPPLY CHARACTERISTICS Power Supply Range, VDD Positive Supply Current, IDD VDD = 3.6V, IN = 0V or 3.6V, CTRL = 3.6V
Full 25 Full
1.8 6 1 -
5.5 8 10 7 140
V A A nA nA
Positive Supply Current, IDD (Low Power State)
VDD = 3.6V, IN = 0V, CTRL = 0V or float
25 Full
DIGITAL INPUT CHARACTERISTICS Voltage Low, VINL, VCTRLL Voltage High, VINH , VCTRLH Input Current, IINL, ICTRLL Input Current, IINH VDD = 2.7V to 3.6V VDD = 2.7V to 3.6V VDD = 3.6V, IN = 0V, CTRL = 0V VDD = 3.6V, IN = 3.6V, CTRL = 0V Full Full Full Full 1.4 -50 -50 20 20 0.5 50 50 V V nA nA
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Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V, VINL = 0.5V, VCTRLH = 1.4V,
VCTRLL = 0.5V, (Notes 4, 6), unless otherwise specified. (Continued) PARAMETER Input Current, ICTRLH CTRL Pull-Down Resistor, RCTRL NOTES: 4. VLOGIC = Input voltage to perform proper function. 5. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 6. Parameters with limits are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation. 7. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range. 8. RON matching between channels is calculated by subtracting the channel with the highest max RON value from the channel with lowest max RON value, between NC1 and NC2 or between NO1 and NO2. TEST CONDITIONS VDD = 3.6V, IN = 0V, CTRL = 3.6V VDD = 3.6V, IN = 0V, CTRL = 3.6V TEMP (C) Full Full (NOTE 5) MIN -2 TYP 1.1 4 (NOTE 5) MAX UNITS 2 A M
Test Circuits and Waveforms
VDD LOGIC INPUT 50% 0V tOFF SWITCH INPUT VINPUT 90% SWITCH OUTPUT 0V tON VOUT 90% VIN SWITCH INPUT tr <20ns tf <20ns VINPUT VDD C
CTRL NO or NC COMx IN GND RL 50 CL 10pF VOUT
Logic input waveform is inverted for switches that have the opposite logic sense.
Repeat test for all switches. CL includes fixture and stray capacitance. RL -----------------------------V OUT = V (INPUT) R + R L ( ON ) FIGURE 1B. TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS FIGURE 1. SWITCHING TIMES
VDD
C
VDD LOGIC INPUT 0V VINPUT
CTRL NOx COMx NCx RL 50 GND VOUT CL 10pF
VOUT SWITCH OUTPUT 0V tD
90% VIN
IN
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches. CL includes fixture and stray capacitance. FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
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ISL54208 Test Circuits and Waveforms (Continued)
VDD C VDD C
RON = V1/100mA
NCx
CTRL
RON = V1/40mA
NOx
CTRL
VNCx V1 100mA
COMx
VNOx IN OV V1 40mA
COMx
IN
VDD
GND
GND
Repeat test for all switches. FIGURE 3. AUDIO/VIDEO RON TEST CIRCUIT
Repeat test for all switches. FIGURE 4. USB RON TEST CIRCUIT
VDD C VDD C CTRL CTRL
NCx or NOx
SIGNAL GENERATOR
NCx
COMx
75
IN IN IMPEDANCE ANALYZER
COMx
0V 0V or VDD ANALYZER
COMx
NCx
GND RL
GND
NC
Repeat test for all switches. FIGURE 5. CAPACITANCE TEST CIRCUIT
Signal direction through switch is reversed, worst case values are recorded. Repeat test for all switches. FIGURE 6. NCx CROSSTALK TEST CIRCUIT
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ISL54208 Test Circuits and Waveforms (Continued)
VDD tri 90% DIN+ DIN90% 50% 10% tfi tro 90% 10% OUT+ OUT90% tf0 50% tskew_o 50% 10% GND DIN143 10% 50% tskew_i DIN+ 143W 15.8 COM2 NO2 CL VDD 15.8 CTRL IN COM1 NO1 CL OUT+ 45 OUT45 C
|tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals. |tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals. |tskew_0| Change in Skew through the Switch for Output Signals. |tskew_i| Change in Skew through the Switch for Input Signals.
FIGURE 7A. MEASUREMENT POINTS FIGURE 7. SKEW TEST
FIGURE 7B. TEST CIRCUIT
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ISL54208 Application Block Diagrams
VDD IN USB AND AUDIO/VIDEO JACK VBUS
CONTROLLER
CTRL
ISL54208
LOGIC CIRCUITRY USB HIGH-SPEED TRANSCEIVER
4M NO1
COM1
DD+ NO2 50k NC1 NC2
COM2
NTSC or PAL VIDEO
50k
AUDIO
GND
LOGIC CONTROL VIA MICRO-PROCESSOR
VDD VBUS USB AND AUDIO/VIDEO JACK IN
ISL54208
CTRL LOGIC CIRCUITRY
CONTROLLER
22k 4M
COM1
4M NO1 NO2 50k NC1 NC2 50k
DD+
USB HIGH-SPEED TRANSCEIVER
COM2
NTSC or PAL VIDEO
AUDIO
GND
LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB
Detailed Description
The ISL54208 device is a dual single pole/double throw (SPDT) analog switch device that can operate from a single dc power supply in the range of 1.8V to 5.5V. It was designed to function as a dual 2 to 1 multiplexer to select between USB differential data signals and mono audio/composite video baseband signals (CVBS). It comes in tiny TQFN and TDFN packages for use in cameras, camcorders, video MP3 players, PDAs, cell phones, and other personal media players. The part consists of two 3 audio/video switches and two 5 USB switches. The audio/video switches can accept signals that swing below ground. They were designed to pass ground reference audio or dc restored with synch composite video signals with minimal distortion. The USB switches were designed to pass high-speed USB differential data signals with minimal edge and phase distortion.
The ISL54208 was specifically designed for digital cameras, camcorders, MP3 players, cell phones and other personal media player applications that need to combine the audio/video jacks and the USB data connector into a single shared connector, thereby saving space and component cost. Typical application block diagrams of this functionality is shown above. The ISL54208 logic control pins are 1.8V logic compatible and can be driven by a standard controller. It has a single logic control pin (IN) that selects between the audio/video switches and the USB switches. The ISL54208 also contains a logic control pin (CTRL) that when driven Low while IN is Low, opens all switches and puts the part into a low power state, drawing typically 1nA of IDD current. A detailed description of the two types of switches is provided in the sections below. The USB transmission and
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audio/video playback are intended to be mutually exclusive operations.
NC1 and NC2 Audio/Video Switches
The two NC (normally closed) audio/video switches (NC1, NC2) are 3 switches that can pass signals that swing below ground by as much as 1.5V. They were designed to pass ground reference audio signals and dc restored composite base-band signals (CVBS) including negative synchronizing pulse with minimal insertion loss and very low distortion and degradation. The -3dB bandwidth into 75 is 338MHz (Figure 17). Crosstalk between NC1 and NC2 @ 4MHz is -78dB (Figure 16) which allows composite video to be routed through one switch and mono-audio through the other switch with little interference. The recommended maximum signal range is from -1.5V to 1.5V. You can apply positive signals greater than 1.5V but the rON resistance of the switch increases rapidly above 1.5V. The signal should not be allowed to exceed the VDD rail or swing more negative than -1.5V. Over a signal range of 1V (0.707Vrms) with VDD >2.7V, these switches have an extremely low rON resistance variation. They can pass a ground referenced audio signal with very low distortion (<0.06% THD+N) when delivering 15.6mW into a 32 headphone speaker load. See Figures 10, 11, 12, and 13 THD+N performance curves. Figures 8 and 9 shows the vector scope plots of a standard NTSC color bar signal at both the input (Figure 8) and output (Figure 9) of the ISL54208. The plots show that except for a little attentuation, due to switch RON and test fixture cabling, there is virtually no degradation of the video waveform through the switch.
FIGURE 9. VECTOR-SCOPE PLOT AFTER SWITCH
Figure 18 shows the differential gain (DG) and differential phase (DP) plots at the output of the switch using an actual NTSC composite video signal and a VM700A Video Measurement Test Set. DG = 0.28% and DP = 0.04deg. The NC switches are uni-directional switches. The audio/video sources should be connected at the NC side of the switch (pins 7 and 8) and the speaker load and video receiver should be connected at the COM side of the switch (pins 3 and 4). The NC switches are active (turned ON) whenever the IN voltage is to 0.5V and the CTRL voltage to 1.4V. Note: Whenever the NC switches are ON the USB transceiver drivers need to be in the high impedance state or static high or low state.
NO1 and NO2 USB Switches
The two NO (normally open) USB switches (NO1, NO2) are 5 bidirectional switches that were designed to pass highspeed USB differential signals in the range of 0V to 400mV. These switches have low capacitance and high bandwidth to pass USB high-speed signals (480Mbps) with minimum edge and phase distortion to meet high-speed USB 2.0 highspeed signal quality specifications. See Figure 14 for Highspeed Eye Pattern taken with switch in the signal path. The maximum signal range for the USB switches is from -1.5V to VDD. The signal voltage at NO1 and NO2 should not be allow to exceed the VDD voltage rail or go below ground by more than -1.5V. The NO switches are active (turned ON) whenever the IN voltage is to 1.4V.
FIGURE 8. VECTOR-SCOPE PLOT BEFORE SWITCH
Note: Whenever the NO switches are ON the audio and video drivers need to be at ac or dc ground or floating to keep from interfering with the data transmission.
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ISL54208
ISL54208 Operation
The discussion that follows will discuss using the ISL54208 in the typical application shown in the block diagrams on page 8. VDD SUPPLY The dc power supply connected at VDD (pin 1) provides the required bias voltage for proper switch operation. The part can operate with a supply voltage in the range of 1.8V to 5.5V. In a typical USB/Audio/Video application for portable battery powered devices the VDD voltage will come from a battery or an LDO and be in the range of 2.7V to 3.6V. For best possible USB full-speed operation (12Mbps) it is recommended that the VDD voltage be 3.3V in order to get a USB data signal level above 2.5V. LOGIC CONTROL The state of the ISL54208 device is determined by the voltage at the IN pin (pin 2) and the CTRL pin (pin 10). Refer to truth-table on page 2 of data sheet. These logic pins are 1.8V compatible with VDD in the range of 2.7V to 3.6V and can be controlled by a standard processor. The CTRL pin is internally pulled low through a 4M resistors to ground and can be left floating or tri-stated by the processor. The CTRL control pin is only active when IN is logic "0". The IN pin does not have an internal pull-down resistor and must not be allowed to float. It must be driven High or Low. The voltage at the IN pin can exceed the VDD voltage by as much as 2.55V. This allows the VBUS voltage from a computer or USB hub (4.4V to 5.25V) to drive the IN pin while the VDD voltage is in the range of 2.7V to 3.6V. An external pull-down resistor is required from the IN pin to ground when directly driving the IN pin with the computer VBUS voltage. See the section titled "USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE "IN' PIN". Logic control voltage levels: IN = Logic "0" (Low) when 0.5V IN = Logic "1" (High) when IN 1.4V CTRL = Logic "0" (Low) when 0.5V or floating. CTRL = Logic "1" (High) when 1.4V Audio/Video Mode If the IN pin = Logic "0" and CTRL pin = Logic "1," the part will be in the Audio/Video mode. In Audio/Video mode the NC1 and NC2 3 audio/video switches are ON and the NO1 and NO2 5 USB switches are OFF (high impedance). When nothing is plugged into the common connector or a audio/video jack is plugged into the common connector, the processor will sense that there is no voltage at the VBUS pin of the connector and will drive and hold the IN control pin of the ISL54208 low. As long as the CTRL = Logic "1," the 10 ISL54208 part will be in the audio/video mode and the media player audio and video drivers can drive the speaker and video display. USB Mode If the IN pin = Logic "1" and CTRL pin = Logic "0" or Logic "1" the part will go into USB mode. In USB mode, the NO1 and NO2 5 switches are ON and the NC1 and NC2 3 audio/video switches are OFF (high impedance). When a USB cable from a computer or USB hub is connected at the common connector, the processor will sense the present of the 5V VBUS and drive the IN pin voltage high. The ISL54208 part will go into the USB mode. In USB mode, the computer or USB hub transceiver and the media player USB transceiver are connected and digital data will be able to be transmitted back and forth. When the USB cable is disconnected, the processor will sense that the 5V VBUS voltage is no longer connected and will drive the IN pin low and put the part back into the Audio/Video or Low Power Mode. Low Power Mode If the IN pin = Logic "0" and CTRL pin = Logic "0," the part will be in the Low Power mode. In the Low Power mode, the NCx switches and the NOx switches are OFF (high impedance). In this state, the device draws typically 1nA of current. USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE "IN" PIN External IN Pull-Down Resistor Rather than using a micro-processor to control the IN logic pin you can directly drive the IN pin using the VBUS voltage from the computer or USB hub. In order to do this you must connected an external pull-down resistor from the IN pin to ground. When an audio/video jack or nothing is connected at the common connector the external pull-down resistor will pull the IN pin low putting the ISL54208 in the Audio/Video Mode or Low Power Mode depending on the condition of the CTRL pin. When a USB cable is connected at the common connector the voltage at the IN pin will be driven to 5V and the part will automatically go into the USB mode. When the USB cable is disconnected from the common connector the voltage at the IN pin will be pulled low by the pull-down resistor and return to the Audio/Video Mode or Low Power Mode depending on the condition of the CTRL pin. Note: The voltage at the IN pin can exceed the VDD voltage by as much as 2.55V. This allows the VBUS voltage from a computer or USB hub (4.4V to 5.25V) to drive the IN pin while the VDD voltage is in the range of 2.7V to 3.6V.
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ISL54208
EXTERNAL SERIES RESISTOR AT IN LOGIC CONTROL PIN The ISL54208 contains a clamp circuit between IN and VDD. Whenever the IN voltage is greater than the VDD voltage by more than 2.55V, current will flow through this clamp circuitry into the VDD power supply bus. During normal USB operation, VDD is in the range of 2.7V to 3.6V and IN (VBUS voltage from computer or USB hub) is in the range of 4.4V to 5.25V, the clamp circuit is not active and no current will flow through the clamp into the VDD supply. In a USB application, the situation can exist where the VBUS voltage from the computer could be applied at the IN pin before the VDD voltage is up to its normal operating voltage range and current will flow through the clamp into the VDD power supply bus. This current could be quite high when VDD is OFF or at 0V and could potentially damage other components connected in the circuit. In the application circuit, a 22k resistor has been put in series with the IN pin to limit the current to a safe level during this situation. It is recommended that a current limiting resistor in the range of 10k to 50k be connected in series with the IN pin. It will have minimal impact on the logic level at the IN pin during normal USB operation and protect the circuit during the time VBUS is present before VDD is up to its normal operating voltage. Note: No external resistor is required in applications where IN pin voltage will not exceed VDD by more than 2.55V.
Typical Performance Curves TA = +25C, Unless Otherwise Specified
0.11 RLOAD = 32 VLOAD = 0.707VRMS 0.3 VDD = 2.6V THD+N (%) 0.08 THD+N (%) 0.4 RLOAD = 32 VDD = 3V 3VP-P 0.1
0.09
0.2 2.5VP-P 0.1 2VP-P 1VP-P 20 200 2K FREQUENCY (Hz) 20K
0.07 VDD = 2.7V 0.06 VDD = 3V VDD = 3.6V
0.05
0.04 20 200 2K FREQUENCY (Hz) 20K
0
FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY
FIGURE 11. THD+N vs SIGNAL LEVELS vs FREQUENCY
0.5 RLOAD = 32 FREQ = 1kHz VDD = 3V
0.5 RLOAD = 32 FREQ = 1kHz VDD = 3V
0.4
0.4
THD+N (%)
THD+N (%)
0.3
0.3
0.2
0.2
0.1
0.1
0 0 0.5 1 1.5 2 2.5 3 3.5 OUTPUT VOLTAGE (VP-P)
0 0 10 20 30 40 50 OUTPUT POWER (mW)
FIGURE 12. THD+N vs OUTPUT VOLTAGE
FIGURE 13. THD+N vs OUTPUT POWER
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ISL54208 Typical Performance Curves TA = +25C, Unless Otherwise Specified (Continued)
VOLTAGE (835mV/DIV)
TIME (10ns/DIV)
FIGURE 14. EYE PATTERN: 480Mbps WITH NOx SWITCHES IN THE SIGNAL PATH
1 NOx Switch 0 -1 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) -2 -3 -4
0 -10 -20 -30 -40 -50 -60 -70 -80 -90 1G -110 0.001 0.01 3 6 10 0.1 1 FREQUENCY (MHz) 100 500 RL = 75 VIN = 0.2VP-P to 2VP-P
RL = 50 VIN = 0.2VP-P to 2VP-P 1M 10M 100M FREQUENCY (Hz)
FIGURE 15. FREQUENCY RESPONSE
FIGURE 16. VIDEO TO AUDIO CROSSTALK
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ISL54208 Typical Performance Curves TA = +25C, Unless Otherwise Specified (Continued)
NORMALIZED GAIN (dB)
1 NCx Switches 0 -1 -2 -3 -4 RL = 75 VIN = 0.2VP-P to 2VP-P 10M 100M FREQUENCY (Hz) 1G
1M
FIGURE 17.
PHASE (DEG)
GAIN (%)
FIGURE 18.
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND (TDFN Paddle Connection: Tie to GND or Float) TRANSISTOR COUNT: 98 PROCESS: Submicron CMOS
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ISL54208 Ultra Thin Quad Flat No-Lead Plastic Package (UTQFN)
D A B
L10.2.1x1.6A
10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL MIN 0.45 NOMINAL 0.50 0.127 REF 0.15 2.05 1.55 0.20 2.10 1.60 0.50 BSC 0.20 0.35 0.40 10 4 1 0 12 0.45 0.25 2.15 1.65 MAX 0.55 0.05 NOTES 5 2 3 3 4 Rev. 3 6/06 NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd and Ne refer to the number of terminals on D and E side, respectively. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature. 7. Maximum package warpage is 0.05mm. 8. Maximum allowable burrs is 0.076mm in all directions. 9. Same as JEDEC MO-255UABD except: No lead-pull-back, "A" MIN dimension = 0.45 not 0.50mm "L" MAX dimension = 0.45 not 0.42mm. 10. For additional information, to assist with the PCB Land Pattern Design effort, see Intersil Technical Brief TB389.
6 INDEX AREA 2X 2X 0.10 C
N
E
1 0.10 C
2
A A1
TOP VIEW
A3 b
0.10 C 0.05 C SEATING PLANE A1 SIDE VIEW (DATUM A) PIN #1 ID 1 2 NX L N (DATUM B) N-1 e 3 (ND-1) X e BOTTOM VIEW C L NX (b) 5 SECTION "C-C" CC e (A1) NX b 5 A
C
D E e k L N
4xk
Nd Ne
0.10 M C A B 0.05 M C
L
TERMINAL TIP
FOR ODD TERMINAL/SIDE
b
2.50 1.75 0.05 MIN L 2.00 0.80 0.275
0.10 MIN DETAIL "A" PIN 1 ID 0.50 LAND PATTERN 10 0.25
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FN6410.0 December 18, 2006
ISL54208 Thin Dual Flat No-Lead Plastic Package (TDFN)
2X 0.10 C A A D 2X 0.10 C B
L10.3x3A
10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL A A1
E
MIN 0.70 -
NOMINAL 0.75 0.20 REF
MAX 0.80 0.05
NOTES -
6 INDEX AREA TOP VIEW B
A3 b D D2 E
// A 0.10 C 0.08 C
0.20 2.95 2.25 2.95 1.45
0.25 3.0 2.30 3.0 1.50 0.50 BSC
0.30 3.05 2.35 3.05 1.55
5, 8 7, 8 7, 8 -
E2 e k
0.25 0.25
0.30 10 5
0.35
8 2 3 Rev. 3 3/06
C SEATING PLANE
SIDE VIEW
A3
L N
D2 (DATUM B) 1 2 D2/2
7
8
Nd NOTES:
6 INDEX AREA (DATUM A)
1. Dimensioning and tolerancing conform to ASME Y14.5-1994.
NX k E2 E2/2
2. N is the number of terminals. 3. Nd refers to the number of terminals on D. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature.
NX L N 8 N-1 NX b e (Nd-1)Xe REF. BOTTOM VIEW C L NX (b) 5 SECTION "C-C" CC e TERMINAL TIP (A1) L1 9L 5 0.10 M C A B
7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 9. Compliant to JEDEC MO-229-WEED-3 except for D2 dimensions.
FOR ODD TERMINAL/SIDE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 15
FN6410.0 December 18, 2006

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