U74HCT138

DESCRIPTION 

The U74HCT138 decodes a three−bit Address to 1−of−8

active−low outputs. 

This device features three Chip Select inputs, two active−low and 

one active−high, to facilitate the demultiplexing, cascading and

chip−selecting functions. 

The demultiplexing function is accomplished by using the 

Address inputs to select the desired device output. One of the Chip 

Selects is used as a data input while the other Chip Selects are held 

in their active states. 

FEATURES 

* Operate from 4.5V to 5.5V 

* Low Input Current:1.0uA Max 

* Low Power Consumption: 8μA Max 

* Typical tPD=15ns 

* Inputs are TTL voltage compatible 

规格书U74HCT138