JVC XL-R2010BK Service Manual page 25

TC74HC00AF-W(IC301,IC311):Digital I/O selector
Pin layout & block diagram
Vcc 4B 4A 4Y
12
14 13 11
2
1 3
1A 1B 1Y 2A
TC74HCU04AF-W(IC331):Digital input selector
1.Pin layout & block diagram
1A 1
1Y 2
2A 3
2Y 4
3A 5
3Y 6
GND 7
3B 3A 3Y
10 9 8
6
4 5
7
2B 2Y GND
2.Truth table
14 VCC
13 6A
12 6Y
11 5A
10 5Y
9 4A
8 4Y
A Y
L H
H L
XL-R2010BK
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