1 Features
• AC types feature 1.5V to 5.5V operation and
balanced noise immunity at 30% of the supply
voltage
• Speed of bipolar F, AS, and S, with significantly
reduced power consumption
• Designed specifically for high-speed memory
decoders and data-transmission systems
• Incorporates three enable inputs to simplify
cascading and/or data reception
• Balanced propagation delays
• ±24mA output drive current
– Fanout to 15 F devices
• SCR-latchup-resistant CMOS process and circuit
design
• Exceeds 2kV ESD protection per MIL-STD-883,
method 3015

2 Description
The CD74AC238 decoder/demultiplexer is designed
for high-performance memory-decoding and datarouting
applications that require very short
propagation-delay times. In high-performance
memory systems, this decoder can be used to
minimize the effects of system decoding.