Read Harman Kardon AVR 3550 Service Manual online
PIN ASSIGNMENT (74HCU04AFN : IC71,72 )
LOGIC SYMBOL
TRUTH TABLE
1
2
3
4
5
6
7
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
1Y
2A
2Y
3A
3Y
GND
6A
6Y
5A
5Y
4A
4Y
6Y
5A
5Y
4A
4Y
Vcc
14
13
12
11
10
9
8
13
12
11
10
9
8
A
L
H
L
H
Y
H
L
H
L
1A
(1)
(3)
(5)
(9)
(3)
(5)
(9)
(11)
(13)
2A
3A
4A
5A
6A
3A
4A
5A
6A
1Y
2Y
3Y
4Y
5Y
6Y
2Y
3Y
4Y
5Y
6Y
(2)
(4)
(6)
(8)
(4)
(6)
(8)
(10)
(12)
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