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CD74HC138 Datasheet(PDF) 3 Page - Texas Instruments

Part No. CD74HC138
Description  High Speed CMOS Logic 3-to-8 Line Decoder/ Demultiplexer Inverting and Non-Inverting
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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 3 page
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3
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LH
H
H
HLH
H
H
HL
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H
H
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H
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LH
HLH
H
H
H
H
H
LH
HL
LH
H
H
H
H
H
H
H
H
HL
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
TRUTH TABLE CD74HC238, CD74HCT238
INPUTS
OUTPUTS
ENABLE
ADDRESS
E3
E2
E1
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
X
X
H
X
X
X
LLLLLLLL
L
XXXXX
L
L
L
L
L
L
L
L
X
H
X
X
X
X
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H
L
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H
L
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HL
L
L
LHLHL
L
L
L
L
L
H
L
LL
H
L
LL
H
L
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H
L
LL
H
H
LLL
H
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HL
LHL
L
L
L
L
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L
L
HL
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L
L
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LHL
L
HL
LH
HL
L
L
L
L
L
LHL
H
L
L
H
H
H
LLLLLLL
H
NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care
TRUTH TABLE CD74HC138, CD74HCT138
INPUTS
OUTPUTS
ENABLE
ADDRESS
E3
E2
E1
A2
A1
A0
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
CD74HC138, CD74HCT138, CD74HC238, CD74HCT238




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