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PI3USB411
3.3V, USB 2.0 High-Speed Signal Switch w/ Low THD Channels for Audio Signals
Features
* * * * * * Bandwidth for USB ports > 1.2Gbps Low THD for Audio ports < 0.02% ESD > 2kV HBM Low ICC = 800A Wide VCC operating range: 2.7V to 4.2V 10% Packaging: Pb-free & Green, 16-contact TDFN (ZJ16)
Description
PI3USB411 integrates two unique Pericom technology solutions into a single IC package. PI3USB411 offers the customer a solution that switches both high speed differential signals, with high bandwidth performance, as well as low THD audio signals. For handheld applications where both a USB data transfer port and a port for an external headset is required, the PI3USB411 solution can offer the ability to combine the two ports into one. With a single port, design engineers are faced with an issue of switching two completely different types of signals. One signal is a high speed differential signal, where bandwidth is the largest concern, and the second signal is an audio signal, where low THD is the largest concern. Pericom's solution offers multiple channels within the PI3USB411 device. Two channels are targeted for high speed USB2.0 signals (Dx), and two channels are targeted for low THD audio signals (Ax). Due to its passive nature, all paths will allow bi-directional traffic.
Block Diagram

Pin Description

Truth Table
USB_EN 0 1 A_ENx 0 1
Note: x = 1, 2
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Function DI = DO DI = DO = Hi-Z Function Ainx = Aoutx Ainx = Aoutx = Hi-Z
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Maximum Ratings
(Above which useful life may be impaired. For user guidelines, not tested.) Storage Temperature ......................................... -65C to +150C Supply Voltage to Ground Potential .................... -0.5V to +4.4V DC Input Voltage ................................................. -0.5V to +5.5V DC Output Current ........................................................... 120mA Power Dissipation ................................................................ 0.5W
Note: Stresses greater than those listed under 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.
DC Electrical Characteristics for USB 2.0 Switching over Operating Range
(only related to pins 1, 2, 4, 14, 15) (TA = -40C to +85C, VCC = 3.3V 10%) Paramenter VIH VIL VIK IIH IIL RON Description Input HIGH Voltage Input LOW Voltage Clamp Diode Voltage Input HIGH Current Input LOW Current Switch On-Resistance(3) On-Resistance Flatness(4) On-Resistance match from center ports to any other port(4) Test Conditions (1) Guaranteed HIGH level Guaranteed HIGH level VCC = Max., IIN = -18mA VCC = Max., VIN = VCC VCC = Max., VIN = GND VCC = Min., 1.25V VIN VCC, IIN = -40mA VCC = Min., VIN @ 1.5V and VCC IIN = -40mA VCC = Min., 1.5V VIN VCC, IIN = -40mA 4 -0.7 VCC = 4.2V VCC = 3.3V Min. 2.0 1.6 0.8 -1.2 5 A 5 6.5 V Typ.(2) Max. Units
RFLAT(ON)
1.0
RON
0.9
2
Capacitance for USB 2.0 Switching (TA = 25C, f = 1 MHz) (only related to pins 1, 2, 4, 14, 15)
Parameters(4) CIN COFF CON Description Input Capacitance Port I Capacitance, Switch OFF Switch Capacitance, Switch ON VIN = 0V Test Conditions(1) Typ.(2) 2.0 4.0 7.5 Max. 3.0 6 9.5 pF Units
Notes for Page 2: 1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, TA = 25C ambient and maximum loading. 3. Measured by the voltage drop between DI and DO pins at indicated current through the switch. ON-resistance is determined by the lower of the voltages on the two (DI & DO) pins. 4. This parameter is determined by device characterization but is not production tested.
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Dynamic Electrical Characteristics Over the Operating Range
Parameters(1) XTALK OIRR BW Description Crosstalk OFF Isolation Bandwidth -3dB
(TA = -40C to +85C, VCC = 3.3V 10%, GND = 0V) (Only related to pins 1, 2, 4, 14, 15)
Test Conditions(3)
Typ.(4) -31 -39 700
Units dB MHz
RL = 100, f = 250 MHz RL = 100
Switching Characteristics (Only related to pins 1, 2, 4, 14, 15)
Parameters tPD tPZH, tPZL tPHZ, tPLZ tSK(p) Propagation Delay(2) Line Enable Time - USB_EN to DI, DO Line Disable Time - USB_EN to DI, DO Skew between opposite transitions of the same output (tPHL - tPLH) (2) 0.5 0.5 0.1 Description Test (3) Conditions Min. Typ.(4) 0.25 15.0 9.0 0.2 ns Max. Units
Power Supply Characteristics
Parameter ICC Description Power Supply Current
Test Conditions(3) VCC = Max, VIN = GND or VCC
Min.
Typ.
Max. 800
Units A
Notes for Page 3: 1. Guaranteed by design. 2. The switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25ns for 10pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side. 3. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 4. Typical values are at VCC = 3.3V, TA = 25C ambient and maximum loading.
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Test Circuit for Electrical Characteristics
6.0V VCC 200-ohm Pulse Generator VIN D.U.T RT VOUT 10pF CL 200-ohm
Notes: * CL = Load capacitance: includes jig and probe capacitance. * RT = Termination resistance: should be equal to ZOUT of the Pulse Generator * Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. * All input impulses are supplied by generators having the following characteristics: PRR MHz, ZO = 50, tR 2.5ns, tF 2.5ns. * The outputs are measured one at a time with on transition per measurement.
Switch Positions
Test tPLZ, tPZL (output on O-side) tPHZ, tPZH (output on O-side) Prop Delay Switch 6.0V GND Open
Test Circuit for Dynamic Electrical Characteristics

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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Switching Waveforms

Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
3.5V Input tPLH tPHL 2.5V 1.5V VOH Output tSK(p) = I tPHL - tPLH I 2.5V VOL
Pulse Skew - tSK(p)
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Audio Switch (only related to pins 5, 6, 7, 8, 9, 11) DC Electrical Characteristics +3V Supply
Parameter Analog Switch Analog Signal Range On-Resistance On-Resistance Match Between Channels On-Resistance Flatness Off Leakage Current On Leakage Current Digital I/O (Pin 5 and Pin 7) Input Logic High Input Logic Low Input Hysteresis Input Leakage Current Power Supply Power-Supply Range VCC 2.7 4.6 V VIH VIL VH IA_EN VCC = 3.3V VA_EN = 0 or VCC -0.5 200 0.5 1.3 0.6 V mV A VAINX or VAOUTX RON RON RONF IOFF I (ON) VCC = 2.7V, IAIN = 100mA, VAOUT = 0 to VCC VCC = 2.7V, IAIN = 100mA, VAOUT = 1.5V VCC = 2.7V, IAIN = 100mA, VAOUT = 0 to VCC VCC = 3.3V, VAOUT = 3V, 0.3V, VAIN = 0.3V, 3V VCC = 3.3V, VAOUT = 3V, 0.3V, VAIN = 0.3V, 3V, or floating -400 -160 -0.3 0.6 0.01 VCC 0.8 0.06 0.25 400 nA 160 V (VCC = 2.7V to 4.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at 3V and +25C.) Symbol Test Conditions Min. Typ. Max. Units
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Switch and AC Characteristics (only related to pins 5, 6, 7, 8, 9, 11)
Parameter Turn-On Time Symbol tON Test Conditions VCC = 2.7V, VAOUT = 1.5V, RL = 50, CL = 35pF, See Test Circuit Figure 1 & 2. VCC = 2.7V, VAOUT = 1.5V, RL = 50, CL = 35pF, See Test Circuit Figure 1 & 2. VAIN = 0, RS = 0, CL = 1nF, See Test Circuit Figure 3. CL = 5pF, RL = 50, f = 100kHz, VAIN = 1 VRMS, , See Test Circuit Figure 4. CL = 5pF, RL = 50, f = 100kHz, VAIN = 1 VRMS, See Test Circuit Figure 5. See Test Circuit Figure 8. Min. Typ. 15 Max. 25 ns 4 55 -75 dB -90 60 MHz 10 pC Units
Turn-Off Time Charge Injection Off-Isolation
tOFF Q OIRR
Crosstalk 3dB Bandwidth
XTALK f3dB
Capacitance (only related to pins 5, 6, 7, 8, 9, 11)
Parameter Off Capacitance On Capacitance Symbol C (OFF) C (ON) Test Conditions f = 1MHz, See Test Circuit Figure 6. f = 1MHz, See Test Circuit Figure 7. Min. Typ. 35 95 Max. Units pF
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals Test Circuits and Timing Diagrams (only related to pins 5, 6, 7, 8, 9, 11)

Note: 1. Unused input (NC or NO) must be grounded.
Figure 1. AC Test Circuit
Logic Input
VIH VIL Off 50% On VOUT Off tOFF 90% tON Logic Input Waveforms inverted for Switches that have opposite logic 90%
tr < 5ns tf < 5ns
Switch Output 0V
Figure 2. AC Waveforms
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals

Figure 3. Charge Injection Test

Figure 4. Off Isolation
Figure 5. Crosstalk

Figure 6. Channel Off Capacitance
Figure 7. Channel On Capacitance
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals

Figure 8. Bandwidth
Application Information
USB 2.0 HS Data + Audio
Figure 9. Application of handheld device combining audio and USB data on single port
USB 2.0 Signals + High Fidelity Audio Signals
Figure 10: USB 2.0 high-Speed (480Mbps) Signal Test Set-up
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals
Figure 11: USB 2.0 High-Speed (480Mbps) TP1, left eye, and TP5, right eye, tested with no PI3USB411 in the signal path
Figure 12: USB 2.0 High-Speed (480Mbps) TP1, left eye, and TP5, right eye, tested with only USB data signals connected (Audio signals are left not connected with no inductors.
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals
Figure 13: USB 2.0 High-Speed (480Mbps) TP1, left eye, and TP5, right eye, tested with PI3USB411 in the signal path with Analog signals "Off" and 9.3uH Inductors for L1 and L2
Figure 14: USB 2.0 full-Speed (12Mbps) Signal Test Set-up
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals
Figure 15: USB 2.0 Full-Speed (12Mbps) TP1, left eye, and TP4, right eye, tested with no PI3USB411 in the signal path
Figure 16: USB 2.0 Full-Speed (12Mbps) TP1, left eye, and TP4, right eye, tested with only USB data signals connected (Audio signals are left not connected with no inductors).
Figure 17: USB 2.0 Full-Speed (12Mbps) TP1, left eye, and TP4, right eye, tested with PI3USB411 in the signal path with Analog signals "Off" and 9.3uH Inductors for L1 and L2
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals
Figure 18: High Fidelity Audio Signal Test Setup. In Figure 18, the test flow is to send a sine wave signal from 30Hz to 30KHz from the Function Generator (HP8116A) to the Pericom Test Board. Pericom took measurements on three test points using a Tektronix Scope (TDS694C). The three test points were TP2 (Channel 1 on Scope), TP3 (Channel 2 on Scope), and TP4 (Channel 3 on Scope). R1 represents the termina-
Figure 19: See Figure 18 for test setup. R1=12K and the sine wave on the left plot is 30kHz, while the sine wave on the right is 30Hz. Channel 1 (black)=TP2, Channel 2 (green)=TP3, Channel 3(red)=TP4
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals
Figure 20: R1=15-ohm, lefta30khz, righta30hz, channel 1 (black)=TP2, channel 2 (green)=TP3, channel 3(red)=TP4
Figure 21: R1=4-ohm and the sine wave on the left plot is 30kHz, while the sine wave on the right is 30Hz. Channel 1 (black)=TP2, Channel 2 (green)=TP3, Channel 3(red)=TP4
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PI3USB411 3.3V, USB 2.0 High-Speed Signal Switch with Low THD Channels for Audio Signals
Packaging Information - 16-contact TDFN
DATE: 03/30/06

DESCRIPTION: 16-contact, Thin Dual-in-line Flat No-Lead (TDFN)
PACKAGE CODE: ZJ (ZJ16) DOCUMENT CONTROL #: PD-2042 REVISION: B
Ordering Information
Ordering Code PI3USB411ZJE Package Code ZJ Package Description Pb-free & Green, 16-contact TDFN Top Mark U1
Notes: * Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ * E = Pb-free and Green * Adding an X suffix = Tape & Reel
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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