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IN74HC139A

Description
dual 1-of-4 decoder/demultiplexer high-performance silicon-gate cmos
File Size102KB,5 Pages
ManufacturerIK Semicon
Websitehttp://www.iksemi.com/en/index.html
Download Datasheet View All

IN74HC139A Overview

dual 1-of-4 decoder/demultiplexer high-performance silicon-gate cmos

TECHNICAL DATA
IN74HC139A
Dual 1-of-4 Decoder/Demultiplexer
High-Performance Silicon-Gate CMOS
The IN74HC139A is identical in pinout to the LS/ALS139. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
This device consists of two independent 1-of-4 decoders, each of
which decodes a two-bit Address to one-of-four active-low outputs.
Active-low Selects are provided to facilitate the demultiplexing and
cascading functions. The demultiplexing function is accomplished by
using the Address inputs to select the desired device output, and
utilizing the Select as a data input.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
µA
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
IN74HC139AN Plastic
IN74HC139AD SOIC
T
A
= -55° to 125° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
FUNCTION TABLE
Inputs
Select
PIN 16 =V
CC
PIN 8 = GND
H
L
L
L
L
A1
X
L
L
H
H
A0
X
L
H
L
H
Y0
H
L
H
H
H
Outputs
Y1
H
H
L
H
H
Y2
H
H
H
L
H
Y3
H
H
H
H
L
X = don’t care
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