Datasheet Summary
1-of-8 Decoder/ Demultiplexer with LSTTL patible 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 acplished 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...
