IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE LOW-VOLTAGE QUAD 2:1MUX/DEMUX BUS SWITCH IDT74CBTLV3257 FEATURES: DESCRIPTION: • • • • • • • 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. Functionally equivalent to QS3257 Ω switch connection between two ports 5Ω 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 QSOP and TSSOP packages 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 OCTOBER 2008 1 © 2006 Integrated Device Technology, Inc. DSC-5744/4 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 / 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 = 25°C(1) Symbol Parameter VCC Supply Voltage VIH High-Level Control Input Voltage VIL Low-Level Control Input Voltage TA Operating Free-Air Temperature Test Conditions VCC = 2.3V to 2.7V Min. Max. Unit 2.3 3.6 V 1.7 — V VCC = 2.7V to 3.6V 2 — VCC = 2.3V to 2.7V — 0.7 — 0.8 −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 = –40°C to +85°C Min. Typ.(1) Max. Unit VCC = 3V, II = –18mA — — –1.2 V Control Inputs VCC = 3.6V, VI = VCC or GND — — ±1 µA Data I/O VCC = 3.6V, VO = 0 or 3.6V, switch disabled — — 20 µA VCC = 0, VI or VO = 0 to 3.6V — — 50 µA Symbol VIK II IOZ Parameter Control Inputs, Data Inputs IOFF ICC VCC = 3.6V, IO = 0, VI = VCC or GND — — 10 µA VCC = 3.6V, one input at 3V, other inputs at VCC or GND — — 300 µA 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 ΔICC(2) Control Inputs CI CIO(OFF) Test Conditions 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 Ω NOTES: 1. Typical values are at VCC = 3.3V, +25°C 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)= 3.3V±0.3V VCC(2)= 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 500Ω 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 500Ω CL tPLZ VLOAD/2 VT tPHZ VT 0V Test Circuits for All Outputs 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 XX Device Type Package Temp. Range CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 Q QG PG PGG Quarter-Size Small Outline Package QSOP - Green Thin Shrink Small Outline Package TSSOP - Green 3257 Low-Voltage Quad 2:1 Mux/Demux Bus Switch 74 –40°C to +85°C for SALES: 800-345-7015 or 408-284-8200 fax: 408-284-2775 www.idt.com 5 for Tech Support: [email protected]