Member of the Texas Instruments

Widebus Family

Supports the VME64 ETL Specification

Reduced TTL-Compatible Input Threshold

Range

High-Drive Outputs (IOH = –60 mA,

IOL = 90 mA) Support Equivalent 25-Ω

Incident-Wave Switching

VCCBIAS Pin Minimizes Signal Distortion

During Live Insertion

Internal Pullup Resistor on OE Keeps

Outputs in High-Impedance State During

Power Up or Power Down

Distributed VCC and GND Pins Minimize

High-Speed Switching Noise

Equivalent 25-Ω Series Damping Resistor

on B Port

Bus Hold on Data Inputs Eliminates the

Need for External Pullup/Pulldown

Resistors

description/ordering information

The SN74ABTE16246 is an 11-bit noninverting

transceiver designed for asynchronous two-way

communication between buses. This device has

open-collector and 3-state outputs. The device

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. When OE is low, the device is active.

The B port has an equivalent 25-Ω series output resistor to reduce ringing. Active bus-hold inputs on the B port

hold unused or floating inputs at a valid logic level.

The A port provides for the precharging of the outputs via VCCBIAS, which establishes a voltage between 1.3 V

and 1.7 V when VCC is not connected.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors

with the bus-hold circuitry is not recommended.