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