HD74AC138

Features:

·  Demultiplexing Capability
·  Multiple Input Enable for Easy Expansion
·  Active LOW Mutually Exclusive Outputs
·  Outputs Source/Sink 24 mA
·  HD74ACT138 has TTL-Compatible Inputs


Pinout




Specifications

Item	Symbol	Max	Unit	Condition
Maximum quiescent supply current	ICC	80	A	VIN = VCC or ground, VCC = 5.5 V, Ta = Worst case
Maximum quiescent supply current	ICC	8.0	A	VIN = VCC or ground, VCC = 5.5 V, Ta = 25°C
Maximum additional ICC/input (HD74ACT166)	ICCT	1.5	mA	VIN = VCC 2.1 V, VCC = 5.5 V, Ta = Worst case

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.