PI3USB20 3.3V, Wide Bandwidth, 4-Channel, 2:1 Mux/DeMux USB 2.0 Switch w/ Single Enable Features Description • RON is 4Ω typical The PI3USB20 is a 8- to 4-Channel multiplexer/demultiplexer Video Switch with Hi-Z outputs. Industry leading advantages include a propagation delay of less than 250ps, resulting from its low channel resistance and I/O capacitance. • Low bit-to-bit skew: 200ps • Low Crosstalk: –27dB @ 250MHz • Near-Zero propagation delay: 250ps The device multiplexes differential outputs from a USB Host device to one of two corresponding outputs. The switch is bidirectional and offers little or no attenuation of the high-speed signals at the outputs. It is designed for low bit-to-bit skew, high channel-tochannel noise isolation and is compatible with various standards, such as high speed USB 2.0 (480 Mb/s). • Switching speed: 9ns • Channel On-Capacitance: 6pF (typical) • VCC Operating Range: +3.0V to +3.6V • ESD>2000V . . . Human Body Model • >500 MHz bandwidth (or data frequency) • Package (Pb-free & Green available): -16-pin, 173-mil wide plastic TSSOP (L) Application • Routes signals for USB 2.0 Pin Description Block Diagram Y0 0I0 Y1 1I0 0I1 1I1 Y2 2I0 Y3 3I0 2I1 3I1 SEL VDD 1 16 0l0 GND 2 15 1I0 Y0 3 14 0I1 Y1 4 13 1I1 Y2 5 12 2 I0 Y3 6 11 3I0 GND 7 10 2I1 SEL 8 9 3I1 Truth Table Function SEL Yn to nI0 L Yn to nI1 H 1 PS8697B 02/01/05 PI3USB20 3.3V, Wide Bandwidth, 4-Channel, 2:1 Mux/DeMux USB 2.0 Switch Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) Storage Temperature ......................................... –65°C to +150°C Supply Voltage to Ground Potential .................... –0.5V to +4.0V 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 (TA = –40°C to +85°C, VCC = 3.3V ±10%) Paramenter Test Conditions Description Min. Typ.(2) Max. Units 0.8 V VIH Input HIGH Voltage Guaranteed HIGH level VIL Input LOW Voltage Guaranteed HIGH level VIK Clamp Diode Voltage VCC = Max., IIN = –18mA IIH Input HIGH Current VCC = Max., VIN = VCC ±5 IIL Input LOW Current VCC = Max., VIN = GND ±5 RON Switch On-Resistance(3) VCC = Min., 1.25V ≤ VIN ≤ VCC, IIN = –40mA RFLAT(ON) On-Resistance Flatness(4) VCC = Min., VIN @ 1.5V and VCC, IIN = -40mA 1.0 On-Resistance match from center ports to any other port(4) VCC = Min., 1.5V ≤ VIN ≤ VCC, IIN = -40mA 0.9 ΔRON 2.0 -0.7 -1.2 4 μA 8 Ω 2 Capacitance (TA = 25°C, f = 1MHz) Parameters(4) Description CIN Input Capacitance COFF Port I Capacitance, Switch OFF CON Switch Capacitance, Switch ON Test Conditions VIN = 0V Typ. Max. 2.0 3.0 4.0 6.0 6.0 10.0 Units pF Notes: 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 = 25°C ambient and maximum loading. 3. Measured by the voltage drop between A and B pins at indicated current through the switch. On-Resistance is determined by the lower of the voltages on the two (A & B) pins. 4. This parameter is determined by device characterization but is not production tested. 2 PS8697B 02/01/05 PI3USB20 3.3V, Wide Bandwidth, 4-Channel, 2:1 Mux/DeMux USB 2.0 Switch Power Supply Characteristics Parameters Description Test Conditions (1) ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC Typ. (2) Min. Max. Units 800 µA Notes: 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. Per TTL driven input (control inputs only); A and B pins do not contribute to ICC. Dynamic Electrical Characteristics Over the Operating Range (TA = –40°C to +85°C, VCC = 3.3V ±10%, GND = 0V) Parameters Description XTALK Crosstalk OIRR OFF Isolation BW Bandwidth -3dB Test Conditions Min. Typ.(1) Max. Units -27 RL = 100Ω, f = 250 MHz dB -32 RL = 100Ω 500 MHz Switching Characteristics Parameters tPD Test Conditions Description Min. Propagation Delay(2,3) Typ.(1) Max. Units 0.25 tPZH, tPZL Line Enable Time - SEL to YN, NI0, IN 0.5 15.0 tPHZ, tPLZ Line Disable Time - SEL to YN, NI0, IN 0.5 9.0 port(2) tSK(o) Output Skew between center port to any other tSK(p) Skew between opposite transitions of the same output (tPHL - tPLH) (2) 0.1 0.2 0.1 0.2 ns Notes: 1. For max. or min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Guaranteed by design. 3. The bus 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 PS8697B 02/01/05 PI3USB20 3.3V, Wide Bandwidth, 4-Channel, 2:1 Mux/DeMux USB 2.0 Switch Test Circuit for Electrical Characteristics(1) 6.0V VCC 200-ohm Pulse Generator VIN D.U.T VOUT 10pF CL RT 200-ohm Notes: 1. CL = Load capacitance: includes jig and probe capacitance. 2. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator 3. 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. 4. All input impulses are supplied by generators having the following characteristics: PRR ≤ MHz, ZO = 50Ω, tR ≤ 2.5ns, tF ≤ 2.5ns. 5. The outputs are measured one at a time with on transition per measurement. Switch Positions Test Switch tPLZ, tPZL (output on I-side) 6.0V tPHZ, tPZH (output on I-side) GND Prop Delay Open Test Circuit for Dynamic Electrical Characteristics HP4195A S1 VCC R1 T1 PI3USB20 HP11667A 10pF 4 50-ohm PS8697B 02/01/05 PI3USB20 3.3V, Wide Bandwidth, 4-Channel, 2:1 Mux/DeMux USB 2.0 Switch Switching Waveforms 2.5V SEL 1.25V 3.5V 2.5V Input 0V 2.5V tPLH tPHL 1.5V Output 2.5V tPZL tPLZ VOH VDD/2 VOH Output 1.25V tPZH 2.5V VOL VOL +0.3V tPHZ VOH –0.3V VDD/2 VOH VOL Output Voltage Waveforms Propagation Delay Times VOL Voltage Waveforms Enable and Disable Times 3.5V 2.5V Data In tPLHX 3.5V 1.5V tPHLX 2.5V Data Out at Channel X I tSK(o) tPLH 1.5V tPHL VOH VOL 2.5V Output VOH VOL 2.5V Data Out at Channel Y 2.5V Input VOH tSK(p) = I tPHL – tPLH I VOL tPLHy tPHLy tSK(o) = I tPLHy – tPLHx I or I tPHLy – tPHLx I Output Skew - tSK(o) Pulse Skew - tSK(p) Applications Information Logic Inputs The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a +3.3V supply, the output enables or select pins may be driven low to 0V and high to 3.6V. Driving IN Rail-to-Rail® minimizes power consumption. Power-Supply Sequencing Proper power-supply sequencing is advised for all CMOS devices. It is recommended to always apply VCC before applying signals to the input/output or control pins. Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd 5 PS8697B 02/01/05 PI3USB20 3.3V, Wide Bandwidth, 4-Channel, 2:1 Mux/DeMux USB 2.0 Switch Package Mechanical: 16-pin TSSOP (L) 16 .169 .177 1 4.3 4.5 .193 .201 4.9 5.1 .004 .008 .047 max. 1.20 0.45 .018 0.75 .030 SEATING PLANE .0256 BSC 0.65 .007 .012 .002 .006 0.09 0.20 .252 BSC 6.4 0.05 0.15 0.19 0.30 Ordering Information Ordering Code Package Code Package Description PI3USB20L L 16-pin TSSOP PI3USB20LE L Pb-free & Green, 16-pin TSSOP Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com 6 PS8697B 02/01/05