IDTQS3VH245 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH(R) PRODUCTS 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH IDTQS3VH245 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 typical * Low RON - 4 * 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, SOIC, and TSSOP packages The QS3VH245 HotSwitch 8-bit bus switch is a high bandwidth bus switch. The QS3VH245 has very low ON resistance, resulting in under 250ps propagation delay through the switch. The switches can be turned ON under the control of the LVTTL-compatible Output Enable signal for bidirectional data flow with no added delay or ground bounce. In the ON state, the switches can pass signals up to 5V. In the OFF state, the switches offer very high impedence at the terminals. The combination of near-zero propagation delay, high OFF impedance, and over-voltage tolerance makes the QS3VH245 ideal forhigh performance communications applications. The QS3VH245 is characterized for operation from -40C to +85C. APPLICATIONS: * * * * * * Hot-swapping 10/100 Base-T, Ethernet LAN switch Low distortion analog switch Replaces mechanical relay ATM 25/155 switching Bus switching and isolation FUNCTIONAL BLOCK DIAGRAM A0 A1 A2 A3 A4 A5 A6 A7 B0 B1 B2 B3 B4 B5 B6 B7 OE The IDT logo is a registered trademark of Integrated Device Technology, Inc. SEPTEMBER 2008 INDUSTRIAL TEMPERATURE RANGE 1 c 2008 Integrated Device Technology, Inc. DSC-5775/9 IDTQS3VH245 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION NC A0 A1 1 2 3 20 19 18 VCC OE B0 A2 4 17 B1 A3 5 16 B2 A4 6 15 B3 A5 7 14 B4 A6 8 13 B5 A7 9 12 B6 GND 10 11 B7 Symbol Description VTERM(2) SupplyVoltage to Ground Max Unit -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 0V) Symbol QSOP/ SOIC/ TSSOP TOP VIEW Parameter (TA = +25C, F = 1MHz, VIN = 0V, VOUT = (1) Typ. Max. Unit CIN Control Inputs 3 5 pF CI/O Quickswitch Channels (Switch OFF) 4 6 pF CI/O Quickswitch Channels (Switch ON) 8 12 pF NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names Description OE Output Enable Ax Data I/Os Bx Data I/Os FUNCTION TABLE(1) OE Outputs H Disconnected L Ax = Bx NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level 2 IDTQS3VH245 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, 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 A IOZ Off-State Current (Hi-Z) 0V VOUT 5V, Switches OFF -- -- 1 A IOFF Data Input/Output Power Off Leakage VIN or VOUT 0V to 5V, VCC = 0V -- -- 1 A 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 NOTE: 1. Typical values are at VCC = 3.3V and TA = 25C. TYPICAL ON RESISTANCE vs VIN AT VCC = 3.3V 16 RON (ohms) 14 12 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 IDTQS3VH245 2.5V / 3.3V 8-BIT 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 A ICCD Dynamic Power Supply Current (4) 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. A and B 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 A and B 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 12 10 ICCD (mA) 8 6 4 2 0 0 2 4 6 8 10 12 ENABLE FREQUENCY (MHZ) 4 14 16 18 20 IDTQS3VH245 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40C to +85C VCC = 2.5 0.2V (1) Symbol Parameter tPLH tPHL tPZL tPZH tPLZ tPHZ Data Propagation Delay(2,3) fOE Operating Frequency - Enable(2,5) Ax to/from Bx Switch Turn-On Delay OE to Ax/Bx Switch Turn-Off Delay OE to Ax/Bx Min. (4) VCC = 3.3 0.3V (1) Max. Min. (4) Max. Unit 0.2 0.2 ns 1.5 8 1.5 7 ns 1.5 7 1.5 6.5 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 OE control input (pass voltage > VCC, VIN = 5V, RLOAD 1M, no CLOAD). 5 IDTQS3VH245 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SOME APPLICATIONS FOR HOTSWITCH PRODUCTS NFET 0 to +5V Vcc = 3.3V +6.5V CHARGE PUMP OE 0 to +5V DRIVER SINGLE HOT SWITCH Rail-to-Rail Switching PHY 3VH SWITCH 4.5VPP LOGIC SIDE 10Mbps to 100Mbps Z = 100 Z = 100 >100m 4.5VPP TWISTED PAIR LOGIC SIDE 2VPP Fast Ethernet Data Switching (LAN Switch) ZERO DOWN TIME SYSTEM PLUGGABLE CARD/ LIVE SYSTEM CARD I/O ON CARD LOGIC CONNECTOR QS3VHXXX CPU CARD I/O ON CARD LOGIC CONNECTOR QS3VHXXX RAM BUS Hot-Swapping 6 IDTQS3VH245 2.5V / 3.3V 8-BIT 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 500 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 500 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 IDTQS3VH245 2.5V / 3.3V 8-BIT 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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