Bidirectional Bus Transceivers in

High-Density 20-Pin Packages

Lower-Power Versions of SN74ALS640B

and SN74ALS645A

Package Options Include Plastic

Small-Outline (DW) Packages and Standard

Plastic (N) 300-mil DIPs

description

These octal bus transceivers are designed for

asynchronous two-way communication between

data buses. These devices transmit data from the

A bus to the B bus or from the B bus to the A bus,

depending on the 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. The SN74ALS1640A features inverting logic, while the SN74ALS1645A features noninverting logic.

The SN74ALS1640A and SN74ALS1645A are characterized for operation from 0°C to 70°C.