Onkyo TX-SA805 - Page 147

IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS -73
Q7172: SN74AHC138PW (3-8 Line Decoder)
BLOCK DIAGRAM
PIN CONFIGURATION
TX-SR805/SA805
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A
B
C
G
2A
G
2B
G1
Y7
GND
V
CC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
ENABLE INPUTS SELECT INPUTS OUTPUTS
G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
XHXXXXHHHHHHHH
XXHXXXHHHHHHHH
LXXXXXHHHHHHHH
HL L L L L LHHHHHHH
HL L L LHHLHHHHHH
HLLLHLHHLHHHHH
HL L LHHHHHLHHHH
HLLHLLHHHHLHHH
HLLHLHHHHHHLHH
HL LHHLHHHHHHLH
HL LHHHHHHHHHHL
Logic Diagram
G1
G
2B
G2A
C
B
A
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
Data
Outputs
Select
Inputs
Enable
Inputs
1
2
3
4
5
6
15
14
13
12
11
10
9
7