Description

The HD74AC138/HD74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for highspeed

bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24

decoder using just three HD74AC138/HD74ACT138 devices or a 1-of-32 decoder using four

HD74AC138/HD74ACT138 devices and one inverter.

Features

• Demultiplexing Capability

• Multiple Input Enable for Easy Expansion

• Active LOW Mutually Exclusive Outputs

• Outputs Source/Sink 24 mA

• HD74ACT138 has TTL-Compatible Inputs

• Ordering Information: Ex. HD74AC138