HD74AC138 Datasheet, PDF (1/11 Pages) Hitachi Semiconductor – 1-of-8 Decoder/Demultiplexer

HD74AC138/HD74ACT138
1-of-8 Decoder/Demultiplexer
Description
The HD74AC138/HD74ACT138 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 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