HD74AC245/HD74ACT245

Octal Bidirectional Transceiver with 3-State Input/Output

Description

The HD74AC245/HD74ACT245 contains eight non-inverting bidirectional buffers with 3-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 bidirectional

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

• Noninverting Buffers

• Bidirectional Data Path

• A and B Outputs Source/Sink 24 mA

• HD74ACT245 has TTL-Compatible Inputs

Pin Names

OE

Output Enable Input

T/

R

Transmit/Receive Input

A

Side A 3-State Inputs or 3-State Outputs

B

Side B 3-State Inputs or 3-State Outputs