IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE LOW-VOLTAGE QUAD 2:1MUX/DEMUX BUS SWITCH FEATURES: IDT74CBTLV3257 DESCRIPTION: * * * * * * * Functionally equivalent to QS3257 switch connection between two ports 5 Isolation under power-off conditions Over-voltage tolerant Latch-up performance exceeds 100mA VCC = 2.3V - 3.6V, Normal Range ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * Available in SSOP, QSOP, and TSSOP packages The CBTLV3257 is a quad 2:1 multiplexer/demultiplexer. The low onstate resistance of the switch allows connections to be made with minimal propagation delay. The select (S) input controls the data flow. The multiplexers/demultiplexers are enabled when the output-enable (OE) input is low. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. APPLICATIONS: * 3.3V High Speed Bus Switching, Multiplexing, and Bus Isolation SIMPLIFIED SCHEMATIC, EACH SWITCH FUNCTIONAL BLOCK DIAGRAM 1A 1B1 SW SW 2A 2B1 SW SW 3A A 2B2 B 3B1 SW SW 4A 1B2 3B2 4B1 SW SW FROM ENABLE CIRCUITRY 4B2 S OE The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE MA7 2001 1 (c) 2001 Integrated Device Technology, Inc. DSC-5744/2 IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol S 1 16 VCC 1B1 2 15 OE 1B2 3 14 4B1 1A 4 13 4B2 2B1 5 12 4A 2B2 6 11 3B1 2A 7 10 3B2 GND 8 9 Max Unit VCC SupplyVoltage Range Description -0.5 to +4.6 V VI Input Voltage Range -0.5 to +4.6 V 128 mA -50 mA -65 to +150 C Continuous Channel Current IIK Input Clamp Current, VI/O < 0 TSTG Storage Temperature NOTE: 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. 3A QSOP / SSOP/ TSSOP TOP VIEW FUNCTION TABLE(1) Inputs OE S Function L L A Port = B1 Port L H A Port = B2 Port H X Disconnect NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care OPERATING CHARACTERISTICS, TA = 25C(1) Symbol Parameter Test Conditions Min. Max. Unit 2.3 3.6 V 1.7 -- V VCC Supply Voltage VIH High-Level Control Input Voltage VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V 2 -- VIL Low-Level Control Input Voltage VCC = 2.3V to 2.7V -- 0.7 -- 0.8 TA Operating Free-Air Temperature -40 85 VCC = 2.7V to 3.6V NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. 2 V C IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Operating Conditions: TA = -40C to +85C Symbol VIK II IOZ Parameter Test Conditions Min. Typ.(1) Max. Unit -- -- -1.2 V Control Inputs, Data Inputs VCC = 3V, II = -18mA Control Inputs VCC = 3.6V, VI = VCC or GND -- -- 1 A Data I/O VCC = 3.6V, VO = 0 or 3.6V, switch disabled -- -- 20 A VCC = 0, VI or VO = 0 to 3.6V -- -- 50 A IOFF VCC = 3.6V, IO = 0, VI = VCC or GND -- -- 10 A ICC(2) ICC Control Inputs VCC = 3.6V, one input at 3V, other inputs at VCC or GND -- -- 300 A CI Control Inputs VI = 3V or 0 -- 4 -- pF A Port B Port VCC = 2.3V Typ. at VCC = 2.5V VO = 3V or 0, OE = VCC = 3.3V -- -- -- -- -- -- -- -- 13 6 5 5 27 5 5 10 -- -- 8 8 40 7 7 15 pF CIO(OFF) RON(3) VI = 0 IO = 64mA IO = 24mA IO = 15mA IO = 64mA IO = 24mA IO = 15mA VI = 1.7V VI = 0 VCC = 3V VI = 2.4V NOTES: 1. Typical values are at VCC = 3.3V, +25C ambient. 2. The increase in supply current is attributable to each current that is at the specified voltage level rather than VCC or GND. 3. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. On-state resistance is determined by the lower of the voltages of the two (A or B ) terminals. SWITCHING CHARACTERISTICS VCC = 2.5V 0.2V Symbol tPD(1) Parameter Propagation Delay VCC = 3.3V 0.3V Min. Max. Min. Max. Unit - 0.15 - 0.25 ns 1 6.1 1 5.3 ns 1 6.1 1 5.3 ns 1 4.8 1 4.5 ns 1 5.6 1 5 ns 1 5.5 1 5.5 ns A to B or B to A tSEL Select Time S to A or B tEN Enable Time S to B tDIS Disable Time S to B tEN Output Enable Time OE to A or B tDIS Output Disable Time OE to A or B NOTE: 1. The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance driven by an ideal voltage source (zero output impedance). 3 IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS SAME PHASE INPUT TRANSITION TEST CONDITIONS Symbol VCC(1)= 3.3V0.3V VCC(2)= 2.5V0.2V 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 500 Pulse(1, 2) Generator tPHL VIH VT 0V DISABLE ENABLE CONTROL INPUT GND tPZL VOUT D.U.T. RT tPLH Propagation Delay Open VIN tPHL OPPOSITE PHASE INPUT TRANSITION VLOAD VCC tPLH OUTPUT OUTPUT SWITCH NORMALLY CLOSED LOW tPZH OUTPUT SWITCH NORMALLY OPEN HIGH 500 CL Test Circuits for All Outputs tPLZ VLOAD/2 VT tPHZ VT 0V 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 2.5ns. SWITCH POSITION Test Switch tPLZ/tPZL VLOAD tPHZ/tPZH GND tSEL Open tPD Open VIH VT 0V VOH VT VOL 4 VIH VT 0V VLOAD/2 VOL + VLZ VOL VOH VOH -VHZ 0V IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION XXX XX CBTLV IDT XX Device Type Package Temp. Range CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Q PY PG PGG Quarter-Size Small Outline Package Shrink Small Outline Package Thin Shrink Small Outline Package TSSOP - Green 3257 Low-Voltage Quad 2:1 Mux/Demux Bus Switch 74 -40C to +85C for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 5 for Tech Support: logichelp@idt.com (408) 654-6459