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M74HC251B1R. Datasheet(PDF) 2 Page - STMicroelectronics

Part # M74HC251B1R.
Description  8-CHANNEL MULTIPLEXER (3-STATE)
PDF  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M74HC251B1R. Datasheet(HTML) 2 Page - STMicroelectronics

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M74HC251
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INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
Z : High Impedance
PIN No
SYMBOL
NAME AND FUNCTION
4, 3, 2, 1, 15,
14, 13, 12
D0 to D7
Multiplexer Inputs
5
Y
Multiplexer Output
6W
Complementary Multi-
plexer Output
7
STROBE
3 State Output Enable
Input
11, 10, 9
A, B, C
Select Inputs
8
GND
Ground (0V)
16
Vcc
Positive Supply Voltage
INPUTS
OUTPUTS
STROBE
YW
CBA
S
XXX
H
Z
Z
LLLL
D0
D0
L
L
H
L
D1
D1
LHL
L
D2
D2
LH
HL
D3
D3
H
L
L
L
D4
D4
HLHL
D5
D5
H
H
L
L
D6
D6
HHH
L
D7
D7



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