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. Functionally equivalent to QS3257 5Ω Switch Connection between Two Ports 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 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 SEPTEMBER 2001 1 c 2001 Integrated Device Technology, Inc. DSC-5744/1 IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION 1 S ABSOLUTE MAXIMUM RATINGS (1) 16 V CC 1B1 2 15 OE 1B2 3 14 4B1 1A 4 4B2 2B1 5 SO16-7 13 SO16-9 SO16-10 12 2B2 6 11 3B1 2A 7 10 3B2 GND 8 9 Symbol VCC Description Supply Voltage Range Max. –0.5 to 4.6 VI Input Voltage Range Unit V –0.5 to 4.6 V Continuous Channel Current 128 mA IIK Input Clamp Current, VI/O < 0 –50 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. 4A 3A FUNCTION TABLE (1) QSOP/ SSOP/ TSSOP TOP VIEW Inputs OE S Function L L L H A Port = B1 Port 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 Symbol VCC Supply Voltage VIH High-Level Control Input Voltage VIL Low-Level Control Input Voltage TA Parameter Test Conditions VCC = 2.3V to 2.7V Min. 2.3 Max. 3.6 Unit 1.7 — V VCC = 2.7V to 3.6V 2 — VCC = 2.3V to 2.7V — 0.7 VCC = 2.7V to 3.6V — 0.8 −40 +85 Operating Free-Air Temperature NOTE: 1. All unused control inputs of the device must be held at VCC or GND to ensure proper operation. 2 V 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 Condition: TA = – 40°C to +85°C Symbol VIK Parameter Control Inputs, Data I/O Test Conditions VCC = 3V, II = −18mA II Control Inputs, Data I/O VCC = 3.6V, VI = VCC or GND IOZ Data I/O Min. — Typ. (1) — Max. – 1.2 Unit V — — ±1 µA VCC = 3.6V, VO = 0 or 3.6V, switch disabled — — 20 µA IOFF VCC = 0, VI or VO = 0 to 3.6V — — 50 µA ICC VCC = 3.6V, IO = 0, VI = VCC or GND — — 10 µA ∆ICC (2) Control Inputs VCC = 3.6V, One input at 3V, Other inputs at VCC or GND — — 300 µA CI Control Inputs VI = 3V or 0 — 4 — pF CIO(OFF) A port VO = 3V or 0, OE = VCC = 3.3V — 13 — pF — 6 — IO = 64mA — 5 8 IO = 24ma — 5 8 VI = 1.7V IO = 15mA — 27 40 VI = 0 IO = 64mA — 5 7 IO = 24mA — 5 7 IO = 15mA — 10 15 B port Max at VCC = 2.3V VI = 0 Typ at VCC = 2.5V RON (3) 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 input 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) tSEL tEN tDIS tEN tDIS Parameter Propagation Delay A to B or B to A Select Time S to A or B Enable Time S to B Disable Time S to B Enable Time OE to A or B Disable Time OE to A or B VCC = 3.3V ± 0.3V Min. − Max. 0.15 Min. − Max. 0.25 Unit 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 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 when 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 PROPAGATION DELAY/ SELECT TIME TEST CONDITIONS Symbol VLOAD VCC(1)= 3.3V ± 0.3V 6 VCC(2)= 2.5V ± 0.2V 2 x Vcc Unit 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 TRANSITIO N V IH VT 0V DISABLE ENABLE 500 Ω CONTROL INPUT GND tPZL V OUT D.U.T. RT tPHL V OH VT VOL ENABLE AND DISABLE TIMES Open Pulse Generator tPLH V LOAD V CC V IN t PHL OPPO SITE PHASE INPUT TRANSITIO N TEST CIRCUITS FOR ALL OUTPUTS (1, 2) tPLH OUTPUT V IH VT 0V OUTPUT SW ITCH NORMALLY CLOSED LOW tPZH OUTPUT SW ITCH NORMALLY OPEN HIGH 500 Ω CL tPLZ V IH VT 0V V LOAD/2 V LOAD/2 VT V OL + V LZ V OL t PHZ VT V OH V OH - V HZ 0V 0V DEFINITIONS: NOTE: CL = Load capacitance: includes jig and load capacitance. RT = Termination resistance: should be equal to ZOUT of the pulse generator. 1. Diagram shown for Input Control Enable-LOW and Input Control Disable-HIGH. 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 tPLZ/tPZL Switch VLOAD tPHZ/tPZH GND tPD Open tSEL Open 4 IDT74CBTLV3257 LOW-VOLTAGE QUAD 2:1 MUX/DEMUX BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX CBTLV Temp. Range XXX XX Device Type Package CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Q PY PG Quarter-Size Small Outline Package (SO16-7) Shrink Small Outline Package (SO16-9) Thin Shrink Small Outline Package (SO16-10) 3257 Low-Voltage Quad 2:1 Mux/Demux Bus Switch 74 –40°C to +85°C for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 5 for Tech Support: [email protected] (408) 654-6459