CD54HC147 ， CD74HC147 ， CD74HCT147
工作原理图
I1
I2
13
I3
1
I4
2
I5
3
I6
4
I7
5
I8
I9
GND = 8
V
CC
= 16
10
14
Y3
6
Y2
7
Y1
11
12
9
Y0
真值表
输入
I1
H
X
X
X
X
X
X
X
X
L
I2
H
X
X
X
X
X
X
X
L
H
I3
H
X
X
X
X
X
X
L
H
H
I4
H
X
X
X
X
X
L
H
H
H
I5
H
X
X
X
X
L
H
H
H
H
I6
H
X
X
X
L
H
H
H
H
H
I7
H
X
X
L
H
H
H
H
H
H
I8
H
X
L
H
H
H
H
H
H
H
I9
H
L
H
H
H
H
H
H
H
H
Y3
H
L
L
H
H
H
H
H
H
H
输出
Y2
H
H
H
L
L
L
L
H
H
H
Y1
H
H
H
L
L
H
H
L
L
H
Y0
H
L
H
L
H
L
H
L
H
L
H =高逻辑电平，L =低逻辑电平，X =无关
2
