54AC245

Inputs/Outputs

General Description

The ’AC/’ACT245 contains eight non-inverting bidirectional

buffers with TRI-STATE outputs and is intended for

bus-oriented applications. Current sinking capability is

24 mA at both the A and B ports. The Transmit/Receive (T/R)

input determines the direction of data flow through the bidi-

rectional transceiver. Transmit (active-HIGH) enables data

from A ports to B ports; Receive (active-LOW) enables data

from B ports to A ports. The Output Enable input, when

HIGH, disables both A and B ports by placing them in a HIGH

Z condition.

Features

n Noninverting buffers

n Bidirectional data path

n A and B outputs source/sink 24 mA

n ’ACT245 has TTL-compatible inputs

n Standard Microcircuit Drawing (SMD)

— ’AC245: 5962-87758

— ’ACT245: 5962-87663

Logic Symbols

Pin

Description

Names

OE

Output Enable Input

T/R

Transmit/Receive Input

A

Side A TRI-STATE Inputs or TRI-STATE Outputs

B

Side B TRI-STATE Inputs or TRI-STATE Outputs

DS100283-1

IEEE/IEC

DS100283-2

August 1998

© 1998 National Semiconductor Corporation

DS100283

www.national.com