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IN74HCT157A Datasheet, PDF (1/6 Pages) Integral Corp. – QUAD 2-INPUT DATA SELECTORS/MULTIPLEXER | |||
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TECHNICAL DATA
Quad 2-Input Data Selectors/Multiplexer
High-Performance Silicon-Gate CMOS
IN74HCT157A
The IN74HCT157A is identical in pinout to the LS/ALS157. This
device may be used as a level converter for interfacing TTL or NMOS
outputs to High Speed CMOS inputs.
This device routes 2 nibbles (A or B) to a single port (Y) as
determined by the Select input. The data is presented at the outputs in
noninvertered form. A high level on the Output Enable input sets all four
Y outputs to a low level.
⢠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
IN74HCT157AN Plastic
IN74HCT157AD SOIC
TA = -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 16 =VCC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Output
Enable
Select Y0-Y3
H
X
L
L
L
A0-A3
L
H
B0-B3
X=donât care
A0-A3,B0-B3=the levels of the respective
Data-Word Inputs
Rev. 00
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