PDF MC74HC138A Download

Description

The 1-of-8 Decoder / Demultiplexer is identical in pinout to the MC74HC138A.

The MC74HCT138A may be used as a level converter for interfacing TTL or  NMOS outputs to High Speed CMOS inputs. The 74HCT138A 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 their active states.

Features

• Output Drive Capability: 10 LSTTL Loads

• Outputs Directly Interface to CMOS, NMOS and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 A

• High Noise Immunity Characteristic of CMOS Devices