74AC138 Datasheet PDF - Fairchild

General Description

●The AC/ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for high-speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three AC/ACT138 devices or a 1-of-32 decoder using four AC/ACT138 devices and one inverter.

●Features

●■ ICC reduced by 50%

●■ Demultiplexing capability

●■ Multiple input enable for easy expansion

●■ Active LOW mutually exclusive outputs

●■ Outputs source/sink 24 mA

●■ ACT138 has TTL-compatible inputs