SN74ABT162245

具有三态输出的 16 位总线收发器

The ’ABT162245 devices are 16-bit noninverting 3-state transceivers designed for synchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.

These devices can be used as two 8-bit transceivers or one 16-bit transceiver. They allow 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 effectively are isolated.

The A-port outputs, which are designed to source or sink up to 12 mA, include equivalent 25- series resistors to reduce overshoot and undershoot.

These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the devices when they are 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.

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Members of the Texas Instruments Widebus™ Family

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A-Port Outputs Have Equivalent 25- Series Resistors, So No External Resistors Are Required

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Typical VOLP Output Ground Bounce <1 V at VCC = 5 V, TA = 25°C

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Distributed VCC and GND Pins Minimize High-Speed Switching Noise

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Ioff Supports Partial-Power-Down Mode Operation

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Flow-Through Architecture Optimizes PCB Layout

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Latch-Up Performance Exceeds 500 mA Per JESD 17

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ESD Protection Exceeds JESD 22

\- 2000-V Human-Body Model A114-A

\- 200-V Machine Model A115-A

Widebus is a trademark of Texas Instruments.