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Part Name
Description
M74HCT257(1993) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
View to exact match
M74HCT257
(Rev.:1993)
HCT257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE) HCT258 QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING)
STMicroelectronics
M74HCT257 Datasheet PDF : 12 Pages
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IEC LOGIC SYMBOL
HCT257
LOGIC DIAGRAM
HCT257
M54/M74HCT257/258
HCT258
HCT258
TRUTH TABLE
INPUTS
OE
SELECT
A
H
X
X
L
L
L
L
L
H
L
H
X
L
H
X
X = DON’T CARE Z = HIGH IMPEDANCE
OUTPUTS
B
Y (257)
Y (258)
X
Z
Z
X
L
H
X
H
L
L
L
H
H
H
L
3/12
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