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74AC157 Datasheet(PDF) 2 Page - STMicroelectronics

Part # 74AC157
Description  QUAD 2 CHANNEL MULTIPLEXER
PDF  9 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74AC157 Datasheet(HTML) 2 Page - STMicroelectronics

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INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUT
O UTPUT
ST ROBE
SELECT
A
B
Y
H
XXX
L
L
LLX
L
LL
H
X
H
LH
X
L
L
LH
X
H
H
X: ”H” or ”L”
PIN DESCRIPTION
PIN No
SYMBOL
NAME AND F UNCTIO N
1
SELECT
Common Data Select Input
2, 5, 11, 14
1A to 4A
Data Inputs From
Source A
3, 6, 10, 13
1B to 4B
Data Inputs From
Source B
4, 7, 9, 12
1Y to 4Y
Multiplexer Outputs
15
STROBE
Strobe Input
8
GND
Ground (0V)
16
VCC
Positive Supply Voltage
LOGIC DIAGRAM
74AC157
2/9



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