SN54ABT162245 - 16-Bit Bus Transceivers With 3-State Outputs

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 I_off. The I_off 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 V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• Members of the Texas Instruments Widebus™ Family
• A-Port Outputs Have Equivalent 25- Series Resistors, So No External Resistors Are Required
• Typical V_OLP (Output Ground Bounce) <1 V at V_CC = 5 V, T_A = 25°C
• Distributed V_CC and GND Pins Minimize High-Speed Switching Noise
• I_off Supports Partial-Power-Down Mode Operation
• Flow-Through Architecture Optimizes PCB Layout
• Latch-Up Performance Exceeds 500 mA Per JESD 17
• 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.