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74AC157(1997) View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
74AC157
(Rev.:1997)
ST-Microelectronics
STMicroelectronics ST-Microelectronics
74AC157 Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
74AC157
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
1
2, 5, 11, 14
3, 6, 10, 13
4, 7, 9, 12
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
STROBE
GND
VCC
NAME AND FUNCTION
Common Data Select Input
Data Inputs From
Source A
Data Inputs From
Source B
Multiplexer Outputs
Strobe Input
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
ST ROB E
H
L
L
L
L
X: ”H” or ”L”
LOGIC DIAGRAM
INPUT
SELECT
A
X
X
L
L
L
H
H
X
H
X
O UTP UT
B
Y
X
L
X
L
X
H
L
L
H
H
2/9
 

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