Product Overview

Product Overview
MC74HCT138A: 1-of-8 Decoder/Demultiplexer with LSTTL Compatible Inputs
For complete documentation, see the data sheet
Product Description
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 their active states.
Features
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Chip Complexity: 122 FETs or 30.5 Equivalent Gates
Output Drive Capability: 10 LSTTL Loads
TTL/NMOS Compatible Input Levels
Operating Voltage Range: 4.5 to 5.5 V
Low Input Current: 1.0 µA
Outputs Directly Interface to CMOS, NMOS, and TTL
In Compliance with the Requirements Defined by JEDEC Standard No. 7A
Pb-Free Packages are Available*
Part Electrical Specifications
Product
Compliance
Status
Channels
VCC Min (V)
VCC Max (V)
tpd Max (ns)
IO Max (mA)
Package Type
MC74HCT138ADG
Pb-free
Active
1
4.5
5.5
27
4
SOIC-16
Active
1
4.5
5.5
27
4
SOIC-16
Active
1
4.5
5.5
27
4
TSSOP-16
Halide free
MC74HCT138ADR2G
Pb-free
Halide free
MC74HCT138ADTR2
G
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016