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CD74HC257 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. CD74HC257
Description  High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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CD74HC257 Datasheet(HTML) 2 Page - Texas Instruments

   
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Functional Diagram
3 CIRCUITS IDENTICAL TO CIRCUIT
IN ABOVE DASHED ENCLOSURE
OE
S
4I1
4I0
3I1
3I0
2I1
2I0
1I1
1I0
15
1
13
14
10
11
6
5
3
2
12
9
7
4
P
N
4Y
3Y
2Y
1Y
TRUTH TABLE
OUTPUT
ENABLE
SELECT
INPUT
DATA INPUTS
OUTPUT
OE
S
I0
I1
Y
H
XXX
Z
LLL
X
L
L
L
HXH
LH
X
L
L
L
HXH
H
NOTE:
H = High Voltage Level
L = Low Voltage Level
X = Don’t Care
Z = High Impedance, OFF State
CD74HC257, CD74HCT257


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