IDT74CBTLV3244 LOW-VOLTAGE OCTAL BUS SWITCH INDUSTRIAL TEMPERATURE RANGE LOW-VOLTAGE OCTAL BUS SWITCH DESCRIPTION: FEATURES: – – – – – – – – IDT74CBTLV3244 Pin-out compatible with standard '244 logic 5Ω A/B bidirectional switch 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 octal bus switch has standard 244 pinouts. The CBTLV3244 is designed for asynchronous communication between data buses. Sets of four switches are controlled by one output Enable (OE). When OE is low, the set of four bus switches is on and port A is connected to port B. When OE is high, the set of four bus switches is off and a high impedance exists between port A and port B. To ensure the high-impedance state during power up or power down, both OEs should be tied to VCC through a pullup resistor. APPLICATIONS: – 3.3V High Speed Bus Switching and Bus Isolation SIMPLIFIED SCHEMATIC, EACH SWITCH FUNCTIONAL BLOCK DIAGRAM 18 2 SW 1A1 8 1A4 SW 1B1 12 1B4 B A 1 1OE OE 9 11 SW 2A1 17 2A4 SW 2B1 3 2B4 19 2OE 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-5393/2 IDT74CBTLV3244 LOW-VOLTAGE OCTAL BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION 1OE 1 20 V CC 1A 1 2 19 2OE 2B 4 3 18 1B 1 1A 2 4 2A 4 2B 3 5 1B 2 1A 3 6 17 SO20-7 SO20-8 16 SO20-9 15 2B 2 7 14 1B 3 1A 4 8 13 2A 2 2B 1 9 12 1B 4 10 11 2A 1 GND (1) Symbol VCC Description Supply Voltage Range Max. –0.5 to 4.6 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 Unit V 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. 2A 3 PIN DESCRIPTION Pin Names xOE Description Output Enable (Active LOW) Ax Port A Inputs or Outputs Bx Port B Inputs or Outputs SSOP/ TSSOP/ QSOP TOP VIEW FUNCTION TABLE (1) Input 1OE H 2OE H 1A, 1B I/Os Disconnect 2A, 2B I/Os Disconnect L H 1A Port = 1B Port Disconnect H L Disconnect 2A Port = 2B Port L L 1A Port = 1B Port 2A Port = 2B Port NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level OPERATING CHARACTERISTICS, TA = 25ºC Symbol VCC Supply Voltage VIH High-Level Control Input Voltage VIL TA Parameter Low-Level Control Input Voltage Min. 2.3 Max. 3.6 Unit VCC = 2.3V to 2.7V 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 Test Conditions Operating Free-Air Temperature NOTE: 1. All unused control inputs must be held at VCC or GND to ensure proper device operation. 2 V V °C IDT74CBTLV3244 LOW-VOLTAGE OCTAL 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 Min. — Typ. — Max. – 1.2 Unit V II Control Inputs, Data I/O IOZ Data I/O VCC = 3.6V, VI = VCC or GND — — ±1 µA VCC = 3.6V, VO = 0 or 3.6V, switch disabled — — 5 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 (1) 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 VO = 3V or 0, OE = VCC — 6 — pF 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 CIO(OFF) Max at VCC = 2.3V VI = 0 Typ at VCC = 2.5V RON (2) VCC = 3V VI = 2.4V Ω NOTES: 1. The increase in supply current is attributable to each input that is at the specified voltage level rather than VCC or GND. 2. This is measured by the voltage drop between the A and B terminals at the indicated current through the switch. SWITCHING CHARACTERISTICS VCC = 2.5V ± 0.2V Symbol tPD(1) tEN tDIS Parameter Propagation Delay A to B or B to A Output Enable Time OE to A or B Output Disable Time OE to A or B VCC = 3.3V ± 0.3V Min. Max. 0.15 Min. Max. 0.25 Unit ns 1 4.5 1 4 ns 1 4.5 1 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 IDT74CBTLV3244 LOW-VOLTAGE OCTAL BUS SWITCH INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CONDITIONS PROPAGATION DELAY 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 TRANSITION V IH VT 0V DISABLE ENABLE 500 Ω CONTROL INPUT GND t PZL V OUT D.U.T. RT t PHL OUTPUT SW ITCH NORMALLY CLO SED LOW t PZH OUTPUT SW ITCH NORMALLY OPE N HIGH 500 Ω CL DEFINITIONS: 1. CL = Load capacitance: includes jig and probe capacitance. 2. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. SWITCH POSITION Switch VLOAD tPHZ/tPZH GND tPD Open t PLZ V IH VT 0V V LO AD/2 V LO AD/2 VT V OL + V LZ V OL tPHZ VT V OH V OH - V HZ 0V 0V NOTE: 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. Test tPLZ/tPZL VOH VT V OL ENABLE AND DISABLE TIMES Open Pulse Generator t PLH V LO AD V CC V IN t PHL OPPOSITE PHASE INPUT TRANSITION TEST CIRCUITS FOR ALL OUTPUTS (1, 2) tPLH OUTPUT V IH VT 0V 4 IDT74CBTLV3244 LOW-VOLTAGE OCTAL BUS SWITCH INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX Tem p. Range CBTLV XXX XX Device Type Package CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 PY Q PG Shrink Small Outline Package (SO20-7) Quarter-size Sm all Outline Package (SO20-8) Thin Shrink Sm all Outline Package (SO20-9) 3244 Low-Voltage Octal 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