3-TO-8 LINE DECODERS /DEMULTIPLEXERS
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
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