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74HC138D-Q100 Datasheet(PDF) 4 Page - NXP Semiconductors

Part No. 74HC138D-Q100
Description  3-to-8 line decoder/demultiplexer; inverting
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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74HC138D-Q100 Datasheet(HTML) 4 Page - NXP Semiconductors

 
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74HC_HCT138_Q100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 1 — 16 July 2012
4 of 18
NXP Semiconductors
74HC138-Q100; 74HCT138-Q100
3-to-8 line decoder/demultiplexer; inverting
5.2 Pin description
6.
Functional description
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care.
Table 2.
Pin description
Symbol
Pin
Description
A0, A1, A2
1, 2, 3
address input A0, A1, A2
E1, E2
4, 5
enable input E1, E2 (active LOW)
E3
6
enable input E3 (active HIGH)
Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7
15, 14, 13, 12, 11, 10, 9, 7
output Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 (active LOW)
GND
8
ground (0 V)
VCC
16
positive supply voltage
Table 3.
Function table[1]
Control
Input
Output
E1
E2
E3
A2
A1
A0
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
H
X
X
X
X
X
HH
HH
HH
HH
XH
X
XXL
L
L
H
L
L
L
HH
HH
HH
HL
L
L
H
HH
HH
HH
L
H
L
H
L
H
HH
HH
L
H
H
L
H
H
H
HH
HL
HH
H
H
L
L
H
HH
L
H
HH
H
H
L
H
H
HL
HH
HH
H
H
H
L
HL
HH
HH
HH
H
H
H
L
H
HH
HH
HH


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