Onkyo TX-SA806 Service Manual page 117

IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS -60
Q8813, Q8814, Q8817, Q8818: TC74VCX162827(20 bit BUS BUFFER)
PIN ASSIGNMENT
10E1 1
1Y1
2
1Y2 3
GND
4
1Y3 5
1Y4
6
VCC 7
1Y5
8
1Y6 9
1Y7
10
GND 11
1Y8
12
1Y9 13
1Y10
14
2Y1 15
2Y2
16
2Y3 17
GND
18
2Y4 19
2Y5
20
2Y6 21
VCC
22
2Y7 23
2Y8
24
GND 25
2Y9
26
2Y10 27
20E1
28
TRUTH TABLE
OE1
L
L
H
X
10E2
56
1A1
55
1A2
54
GND
53
1A3
52
1A4
51
VCC
50
1A5
49
1A6
48
1A7
47
GND
46
1A8
45
TOP VIEW
1A9
44
1A10
43
2A1
42
2A2
41
2A3
40
GND
39
2A4
38
2A5
37
2A6
36
VCC
35
2A7
34
2A8
33
GND
32
2A9
31
2A10
30
20E2
29
Inputs
Outputs
OE2 A Y
L L L
L H H
X X Z
H X Z
SYSTEM DIAGRAM
1
10E1
56
10E2
55
1A1
To nine other channels
28
20E1
29
20E2
42
2A1
To nine other channels
TX-SR806/SA806
2
1Y1
15
2Y1