MC74HCT138A 1-of-8 Decoder/ Demultiplexer with LSTTL Compatible Inputs High−Performance Silicon−Gate CMOS The MC74HCT138A is identical in pinout to the LS138.
The HCT138A may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs.
The HCT138A decodes a three−bit Address to one−of−eight active−lot 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 ...

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