IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH® PRODUCTS 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH IDTQS3VH253 FEATURES: DESCRIPTION: • N channel FET switches with no parasitic diode to VCC – Isolation under power-off conditions – No DC path to VCC or GND – 5V tolerant in OFF and ON state • 5V tolerant I/Os Ω typical • Low RON - 4Ω • Flat RON characteristics over operating range • Rail-to-rail switching 0 - 5V • Bidirectional dataflow with near-zero delay: no added ground bounce • Excellent RON matching between channels • VCC operation: 2.3V to 3.6V • High bandwidth - up to 500MHz • LVTTL-compatible control Inputs • Undershoot Clamp Diodes on all switch and control Inputs • Low I/O capacitance, 4pF typical • Available in QSOP and TSSOP packages The QS3VH253 HotSwitch Dual 4:1 multiplexer/demultiplexer is a high bandwidth bus switch. The QS3VH253 has very low ON resistance, resulting in under 250ps propagation delay through the switch. The Select (Sx) inputs control the data flow. The multiplexers/demultiplexers are enabled when the Enable (EA, EB) inputs are low. In the ON state, the switches can pass signals up to 5V. In the OFF state, the switches offer very high impedance at the terminals. The combination of near-zero propagation delay, high OFF impedance, and over-voltage tolerance makes the QS3VH253 ideal for high performance communication applications. The QS3VH253 is characterized for operation from -40°C to +85°C. APPLICATIONS: • • • • • Hot-swapping Multiplexing/demultiplexing Low distortion analog switch Replaces mechanical relay ATM 25/155 switching FUNCTIONAL BLOCK DIAGRAM S0 S1 EA EB I0 A I1 A YA I2 A I3 A I0 B I1 B YB I2 B I3 B The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE SEPTEMBER 2008 1 c 2008 Integrated Device Technology, Inc. DSC-5945/10 IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH ABSOLUTE PIN CONFIGURATION EA 1 16 2 S1 15 VCC EB I3A 3 14 S0 I2A 4 13 I3B I1A 5 12 I2B I0A 6 11 I1B YA GND 7 8 10 9 I0B YB INDUSTRIAL TEMPERATURE RANGE (1) MAXIMUM RATINGS Symbol Description VTERM(2) SupplyVoltage to Ground Max –0.5 to +4.6 V VTERM(3) DC Switch Voltage VS –0.5 to +5.5 V VTERM(3) DC Input Voltage VIN –0.5 to +5.5 V VAC AC Input Voltage (pulse width ≤20ns) –3 V IOUT DC Output Current (max. sink current/pin) 120 mA TSTG Storage Temperature –65 to +150 °C 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. VCC terminals. 3. All terminals except VCC . CAPACITANCE (TA = +25°C, F = 1MHz, VIN = 0V, VOUT = Parameter(1) 0V) Symbol Typ. CIN Control Inputs CI/O Quickswitch Channels (Switch OFF) QSOP/ TSSOP TOP VIEW CI/O Quickswitch Channels (Switch ON) Demux Outputs 15 Mux 12 16 PIN DESCRIPTION S0 YA YB Function H X X X Z X Disable A X H X X X Z Disable B L L L L I0A I0B S1 - 0 = 0 EA, EB I Enable Input YA, YB O Data Outputs L H I1A I1B S1 - 0 = 1 L L H L I2A I2B S1 - 0 = 2 L L H H I3A I3B S1 - 0 = 3 NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedence 2 pF pF 16 S1 L 5 6 11 EB L 3 12 EA Pin Names I/O Description Ixx I Data Inputs S0, S1 I Select Input Unit 4 Mux FUNCTION TABLE(1) Select Max. Demux NOTE: 1. This parameter is guaranteed but not production tested. Enable Unit pF IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 3.3V ±0.3V Symbol VIH VIL Parameter Test Conditions Input HIGH Voltage Input LOW Voltage Min. Typ.(1) Max. Guaranteed Logic HIGH VCC = 2.3V to 2.7V 1.7 — — for Control Inputs VCC = 2.7V to 3.6V 2 — — Guaranteed Logic LOW VCC = 2.3V to 2.7V — — 0.7 for Control Inputs VCC = 2.7V to 3.6V — — 0.8 Unit V V IIN Input Leakage Current (Control Inputs) 0V ≤ VIN ≤ VCC — — ±1 µA IOZ Off-State Current (Hi-Z) 0V ≤ VOUT ≤ 5V, Switches OFF — — ±1 µA IOFF Data Input/Output Power Off Leakage VIN or VOUT 0V to 5V, VCC = 0V — — ±1 µA RON Switch ON Resistance VCC = 2.3V VIN = 0V ION = 30mA — 6 8 Typical at VCC = 2.5V VIN = 1.7V ION = 15mA — 7 9 VCC = 3V VIN = 0V ION = 30mA — 4 6 VIN = 2.4V ION = 15mA — 5 8 Ω NOTE: 1. Typical values are at VCC = 3.3V and TA = 25°C. TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V 16 14 RON 12 (ohms) 10 8 6 4 2 0 0.0 0.5 1.0 1.5 2.0 2.5 VIN (Volts) 3 3.0 3.5 4.0 4.5 5.0 IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol Test Conditions(1) Parameter Min. Typ. Max. Unit ICCQ Quiescent Power Supply Current VCC = Max., VIN = GND or VCC, f = 0 — 2 4 mA ∆ICC Power Supply Current (2,3) per Input HIGH VCC = Max., VIN = 3V, f = 0 per Control Input — — 30 µA ICCD (4) Dynamic Power Supply Current VCC = 3.3V, A and B Pins Open, Control Inputs See Typical ICCD vs Enable Frequency graph below Toggling @ 50% Duty Cycle NOTES: 1. For conditions shown as Min. or Max., use the appropriate values specified under DC Electrical Characteristics. 2. Per input driven at the specified level. Mux/demux pins do not contribute to ∆Icc. 3. This parameter is guaranteed but not tested. 4. This parameter represents the current required to switch internal capacitance at the specified frequency. The mux/demux inputs do not contribute to the Dynamic Power Supply Current. This parameter is guaranteed but not production tested. TYPICAL ICCD vs ENABLE FREQUENCY CURVE AT VCC = 3.3V 6 ICCD (mA) 4 2 0 0 2 4 6 8 10 12 ENABLE FREQUENCY (MHz) 4 14 16 18 20 IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40°C to +85°C VCC = 2.5 ± 0.2V (1) Symbol tPLH tPHL tSEL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ fExorSx Parameter Data Propagation Delay(2,3) Yx to Ixx or Ixx to Yx Select Time S to Yx Enable Time Sx to Ixx Disable Time Sx to Ixx Enable Time Ex to Yx or Ixx Disable Time Ex to Yx or Ixx Operating Frequency - Enable(2,5) Min. (4) VCC = 3.3 ± 0.3V (1) ⎯ Max. 0.2 Min. (4) ⎯ Max. 0.2 Unit ns 1.5 9 1.5 8 ns 1.5 9 1.5 9 ns 1.5 8 1.5 8 ns 1.5 9 1.5 8 ns 1.5 8 1.5 8 ns ⎯ 10 ⎯ 20 MHz NOTES: 1. See Test Conditions under TEST CIRCUITS AND WAVEFORMS. 2. This parameter is guaranteed but not production tested. 3. The bus switch contributes no propagation 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 0.2ns at CL = 50pF. Since this time constant is much smaller than the rise and fall times of typical driving signals, it adds very little propagation delay to the system. Propagation 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 interaction with the load on the driven side. 4. Minimums are guaranteed but not production tested. 5. Maximum toggle frequency for Sx or Ex control input (pass voltage > VCC, VIN = 5V, RLOAD ≥ 1MΩ, no CLOAD). 5 IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SOME APPLICATIONS FOR HOTSWITCH PRODUCTS NFET 0 to +5V Vcc = 3.3V OE 0 to +5V +6.5V CHARGE PUM P D RIVER SINGLE HOT SW ITCH Rail-to-Rail Switching M ULTIPLEX ING C ONTROL CIRCUITRY 1 CPU M EM ORY 4 BANK S 4 M EM ORY Multiplexing/Demultiplexing ZERO DOWN TIM E SYS TEM PLUGGAB LE CARD / LIVE SYSTEM CARD I/O ON CARD LOGIC CONN ECTOR QS3VH XXX CARD I/O ON CARD LOGIC CONNECTOR QS3VH XXX CPU RAM BUS Hot-Swapping 6 IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS (1) (2) Symbol VCC = 3.3V ± 0.3V VCC = 2.5V ± 0.2V Unit VLOAD 6 2 x Vcc V VIH 3 Vcc V VT 1.5 VCC/2 V VLZ 300 150 mV VHZ 300 150 mV CL 50 30 pF SAME PHASE INPUT TRANSITION tPLH tPHL tPLH tPHL OUTPUT VIH VT 0V VOH VT VOL VIH VT 0V OPPOSITE PHASE INPUT TRANSITION Propagation Delay VLOAD VCC 500Ω Pulse(1, 2) Generator VIN CONTROL INPUT GND tPZL VOUT D.U.T. RT DISABLE ENABLE Open OUTPUT SWITCH NORMALLY CLOSED LOW tPZH OUTPUT SWITCH NORMALLY OPEN HIGH 500Ω CL tPLZ VLOAD/2 VT tPHZ VT 0V VIH VT 0V VLOAD/2 VOL + VLZ VOL VOH VOH -VHZ 0V Test Circuits for All Outputs NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. Enable and Disable Times DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. NOTES: 1. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2.5ns; tR ≤ 2.5ns. 2. Pulse Generator for All Pulses: Rate ≤ 10MHz; tF ≤ 2ns; tR ≤ 2ns. SWITCH POSITION Test Switch tPLZ/tPZL VLOAD tPHZ/tPZH GND tPD Open 7 IDTQS3VH253 2.5V / 3.3V DUAL 4:1 MUX/DEMUX HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION Datasheet Document History 09/01/08 Pg. 4, 8 Revise ICCQ Typ. and Max. Remove non green package version and updated the ordering information by removing the “IDT” notation. 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