JVC KD-S821R Service Manual page 27

HD74HC126FP-X (IC771) : Buffer
1.Terminal layout
1C 1
1A 2
3
1Y
4
2C
5
2A
6
2Y
7
GND
2.Block diagram
Vcc
Input
3.Pin function
14 3Y
13 3A
12
3C
11
4Y
10
4A
9
4C
8
Vcc
Vcc
1A
Output
1Y
2A
3A
4A
1C
2C
Output
3C
2Y
4C
Output
3Y
Output
4Y
Input Output
C A Y
L X Z
H L H
H H L
Note: H : High
L : Low
X : H and L
Z : H.L.X
1k
S1
CL
1k
Sample as Load Circuit 1
Sample as Load Circuit 1
Sample as Load Circuit 1
KD-S821R
1-27