JVC KD-LH7R Service Manual page 29

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3 7 63 1515 0
HD74HC126FP-X (IC801) : Buffer
1.Terminal layout
1C
1A
1Y
2C
2A
2Y
GND
2.Block diagram
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1 14 VU
2 13
4C
3 12
4A
4 11 4Y
5 10 3C
6 9
3A
7 8
3Y
Vcc Vcc
1A
2A
3A
Input
4A
1C
2C
3C
4C
Note) CL includes probe and jig capacitance
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8
3.Pin function
Input Output
C A
L X
H L
H H
Note) H:High level
L:Low level
X:Irrelevant
Z:Off(High-impedance)
State a 3-state input
1k
Output
1Y
2Y
CL
Q Q
3 6 7 1 3
Output
2Y
Sample as Load Circuit 1
Output
3Y
Sample as Load Circuit 1
Output
4Y
Sample as Load Circuit 1
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2 9 9 4 2 8
Y
Z
H
L
S1
1k
1 5 0 5 8 2 9 9 4
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KD-LH7R
9 9
2 8 9 9
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