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SN74LVC32245 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74LVC32245 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 9 page SN74LVC32245 32-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS SCES343D – OCTOBER 2000 – REVISED JULY 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Member of the Texas Instruments Widebus+ Family D Operates From 1.65 V to 3.6 V D Inputs Accept Voltages to 5.5 V D Max tpd of 4 ns at 3.3 V D Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C D Typical VOHV (Output VOH Undershoot) >2 V at VCC = 3.3 V, TA = 25°C D Ioff Supports Partial-Power-Down Mode Operation D Supports Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC) description/ordering information This 32-bit noninverting bus transceiver is designed for 1.65-V to 3.6-V VCC operation. The SN74LVC32245 is designed for asynchronous communication between data buses. The control-function implementation minimizes external timing requirements. This device can be used as four 8-bit transceivers, two 16-bit transceivers, or one 32-bit transceiver. It allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated. Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. 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. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING 40 °Cto85°C LFBGA – GKE Tape and reel SN74LVC32245GKER NC245 –40 °C to 85°C LFBGA – ZKE (Pb-free) Tape and reel SN74LVC32245ZKER NC245 † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2003, Texas Instruments Incorporated Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Widebus+ is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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