IN74HCT139A Datasheet, PDF (1/5 Pages) Integral Corp. – DUAL 1-OF-4 DECODER/DEMULTIPLEXER

IN74HCT139A
DUAL 1-OF-4 DECODER/DEMULTIPLEXER
High-Performance Silicon-Gate CMOS
The IN74HCT139A is identical in pinout to the LS/ALS139.
The IN74HCT139A may be used as a level converter for
interfacing TTL or NMOS outputs to High Speed CMOS inputs.
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.
• TTL/NMOS Compatible Input Levels
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 4.5 to 5.5 V
• Low Input Current: 1.0 µA
ORDERING INFORMATION
IN74HCT139AN Plastic
IN74HCT139AD SOIC
T_A = -55° to 125° C for all
packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 16 =V_CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Select A1 A0 Y0 Y1 Y2 Y3
H
X
X HH H H
L
L L LH H H
L
L HHL H H
L
H L HH L H
L
H H HH H L
X = don’t care
1