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
• Incorporate 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 ’AC138 decoders/demultiplexers are designed for
high-performance memory-decoding and data-routing
applications that require very short propagation-delay
times. In high-performance memory systems, these
decoders can be used to minimize the effects of
system decoding.