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CD74HC251 Datasheet(PDF) 2 Page - Texas Instruments

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Part No. CD74HC251
Description  High Speed CMOS Logic 8-Input Multiplexer; Three-State
Download  7 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
Logo TI - Texas Instruments

CD74HC251 Datasheet(HTML) 2 Page - Texas Instruments

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Functional Diagram
TRUTH TABLE
INPUTS
OUTPUT
SELECT
OUTPUT
CONTROL OE
Y
Y
S2
S1
S0
XXX
H
Z
Z
LLL
L
I0
I0
LL
H
L
I1
I1
LHL
L
I2
I2
LH
H
L
I3
I3
HL
L
L
I4
I4
HLH
L
I5
I5
HH
L
L
I6
I6
HHH
L
I7
I7
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care, Z = High Imped-
ance (Off), I0, I1...I7 = the level of the respective input.
5
6
Y
Y
4
3
2
1
14
12
13
15
I0
I7
I6
I5
I4
I3
I2
I1
11
S0
10
S1
9
S2
7
OE
CHANNEL
INPUTS
DATA
SELECT
OUTPUTS
CD74HC251, CD74HCT251


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