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| IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE QUICKSWITCH(R) PRODUCTS 2.5V/3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH FEATURES: DESCRIPTION: IDTQS3VH383 * 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 * Low RON - 4 typical * 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 500 MHz * 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 QS3VH383 Bus Exchange HotSwitch with 10-bits is a high bandwidth bus switch. The QS3VH383 has very low ON resistance, resulting in under 250ps propagation delay through the switch. The Bus Enable (BE) signal turns the switches on. The Bus Exchange (BX) signal provides nibble swap of the AB and CD signal pairs. This exchange configuration allows byte swapping of buses. In the OFF and ON states, the switches are 5V-tolerant. In the OFF state, the switches offer very high impedence at the terminals. The combination of near-zero propagation delay, the lack of additional ground bounce noise, high OFF impedance, and over-voltage tolerance makes the QS3VH383 ideal for high performance communications applications. The QS3VH383 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 FUNCTIONAL BLOCK DIAGRAM A0 C0 B0 D0 A4 C4 B4 D4 BX BE The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE 1 c 2002 Integrated Device Technology, Inc. APRIL 2002 DSC-5878/4 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION BE C0 A0 B0 D0 C1 A1 B1 D1 C2 A2 GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC D4 B4 A4 C4 D3 B3 A3 C3 D2 B2 BX ABSOLUTE MAXIMUM RATINGS(1) Symbol VTERM(2) VTERM(3) VTERM(3) VAC IOUT TSTG Description Supply Voltage to Ground DC Switch Voltage VS DC Input Voltage VIN AC Input Voltage (pulse width 20ns) DC Output Current (max. current/pin) Storage Temperature Max. - 0.5 to 4.6 - 0.5 to 5.5 - 0.5 to 5.5 -3 120 -65 to +150 Unit V V V V mA 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 Symbol CIN CI/O CI/O Parameter(1) Control Inputs (TA = +25 C, f = 1MHz, VIN = 0V, VOUT = 0V) Typ. 3 7 14 Max. 5 11 22 Unit pF pF pF o Quickswitch Channels (Switch OFF) Quickswitch Channels (Switch ON) QSOP/ SOIC/ TSSOP TOP VIEW NOTE: 1. This parameter is guaranteed but not production tested. PIN DESCRIPTION Pin Names A0-A4, B0-B4 C0-4, D0-D4 BE BX I/O I/O I/O I I Description Buses A and B Buses C and D Bus Switch Enable Bus Exchange FUNCTION TABLE(1) BE H L L BX X L H A0-A4 Z C0-C4 D0-D4 B0-B4 Z D0-D4 C0-C4 Function Disconnect Connect Exchange NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High-Impedance 2 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE(1) Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 3.3V 0.3V Symbol VIH VIL IIN IOZ IOFF RON Parameter Input HIGH Voltage Input LOW Voltage Input Leakage Current (Control Inputs) Off-State Current (Hi-Z) Data Input/Output Power Off Leakage Switch ON Resistance Test Conditions Guaranteed Logic HIGH for Control Inputs Guaranteed Logic HIGH for Control Inputs VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V Min. 1.7 2 -- -- -- -- -- ION = 30mA ION = 15mA ION = 30mA ION = 15mA -- -- -- -- Typ.(1) -- -- -- -- -- -- -- 6 7 4 5 Max. -- -- 0.7 0.8 1 1 1 8 9 6 8 A A A V Unit V VCC 0V VOUT 5V, Switches OFF VIN or VOUT 0V to 5V, VCC = 0V VCC = 2.3V VCC = 3V VIN = 0V VIN = 0V VIN = 2.4V (Typ. at VCC = 2.5V) VIN = 1.7V 0V VIN 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 3.0 3.5 4.0 4.5 5.0 VIN (Volts) 3 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ICCQ ICC ICCD Parameter Quiescent Power Supply Current Power Supply Current (2,3) Test Conditions(1) VCC = Max., VIN = GND or VCC, f = 0 VCC = Max., VIN = 3V, f = 0 per Control Input VCC = 3.3V, A, B,C, or D Pins Open, Control Inputs Toggling @ 50% Duty Cycle per Input HIGH Min. -- -- Typ. 1.5 -- Max. 3 30 Unit mA A Dynamic Power Supply Current(4) See Typical ICCD vs Enable Frequency graph below 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, B, C, and D 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, B, C, and D 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 20 18 16 14 12 10 ICCD (mA) 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 20 ENABLE FREQUENCY (MHz) 4 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SWITCHING CHARACTERISTICS OVER OPERATING RANGE TA = -40C to +85C VCC = 2.5 0.2V (1) Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ tPBX fENABLE Parameter Data Propagation Delay(2,3) Ax or Bx to Cx or Dx, Cx or Dx to Ax or Bx Switch Turn-On Delay BE to Ax, Bx, Cx, Dx Switch Turn-Off Delay BE to Ax, Bx, Cx, Dx Bus Exchange Propagation Delay BX to Ax, Bx, Cx, Dx Operating Frequency - Enable (BE ) (2,5) Min. (4) 1.5 1.5 1.5 Max. VCC = 3.3 0.3V (1) Min. (4) 1.5 1.5 1.5 Max. Unit ns ns ns ns MHz 0.2 8.5 8 8 10 0.2 8.5 8 7.5 20 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 0.25ns 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 BE control input (pass voltage > VCC, VIN = 5V, RLOAD > 1M, no CLOAD). 5 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE SOME APPLICATIONS FOR HOTSWITCH PRODUCTS 0 to +5V NFET 0 to +5V Vcc = 3.3V CHARGE PUMP +6.5V OE DRIVER SINGLE HOT SWITCH Rail-to-Rail Switching PHY 4.5VPP 3VH SWITCH LOGIC SIDE 4.5VPP Z = 100 10Mbps to 100Mbps >100m TWISTED PAIR Z = 100 LOGIC SIDE 2VPP Fast Ethernet Data Switching (LAN Switch) PLUGGABLE CARD/ LIVE SYSTEM CONNECTOR ZERO DOWN TIME SYSTEM QS3VHXXX CARD I/O ON CARD LOGIC CPU CONNECTOR QS3VHXXX CARD I/O ON CARD LOGIC RAM BUS Hot Swapping 6 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS Symbol VLOAD VIH VT VLZ VHZ CL VCC(1)= 3.3V 0.3V 6 3 1.5 300 300 50 VCC(2)= 2.5V 0.2V 2 x Vcc Vcc VCC/2 150 150 30 Unit V V V mV mV pF tPLH OPPOSITE PHASE INPUT TRANSITIO N tPHL SAM E PHAS E INPUT TRANSITION tPLH OUTPUT tPHL VIH VT 0V VOH VT VOL VIH VT 0V Propagation Delay VLOAD ENABLE Open 500 Pulse G enerator (1, 2) VCC DISABLE GND CONTROL INPUT tPZL OUTPUT SW ITCH NORMALLY CLOSED LOW tPZH OUTPUT SW ITCH NO RM ALLY OPEN HIGH VLOAD/2 VT tPHZ VT 0V tPLZ VIH VT 0V VLOAD/2 V OL V OL VOH V OH 0V + VIN D.U.T. VOUT V LZ RT 500 CL -V H Z Test Circuits for All Outputs 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 1.0MHz; tF 2.5ns; tR 2.5ns. 2. Pulse Generator for All Pulses: Rate 1.0MHz; tF 2ns; tR 2ns. NOTE: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. Enable and Disable Times SWITCH POSITION Test tPLZ/tPZL tPHZ/tPZH tPD Switch VLOAD GND Open 7 IDTQS3VH383 2.5V / 3.3V 8-BIT HIGH BANDWIDTH BUS EXCHANGE BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDTQS XXXXX Device Type XX Package SO Q PA 3VH383 Small Outline IC Quarter Size Outline Package Thin Shrink Small Outline Package 2.5V/3.3V 8-Bit High Bandwidth Bus Exchange Bus Switch CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 8 for Tech Support: logichelp@idt.com (408) 654-6459 |
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