Onkyo TX-SR502E Service Manual page 47

QQ
3 7 63 1515 0
IC BLOCK DIAGRAM AND TERMINAL DESCRIPTIONS-3
Q291: BU4053B (Triple 2- channel analog multiplexer/ demultiplexer)
BLOCK DIAGRAM
TRUTH TABLE
TE
L 13942296513
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http://www.xiaoyu163.com
VDD (16)
INH (6)
LEVEL
A (11)
CONVERTER
B (10)
C (9)
VSS (8)
VEE (7)
X0 (12)
X1 (13)
Y0 (2)
Y1 (1)
Z0 (5)
Z1 (3)
INH A B
L L L
L H L
L L H
L H H
L L L
L H L
L L H
L H H
H X X
X:lrrelevant
x ao
y
i
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8
BINARY TO 1of 2
DECODER WITH INH
(14) X
(15) Y
C ON SWITCH
L X Y Z
0 0 0
L X Y Z
1 0 0
L X Y Z
0 1 0
L X Y Z
1 1 0
Q Q
3 6 7 1 3
H X Y Z
0 0 1
H X Y Z
1 0 1
H X Y Z
0 1 1
H X Y Z
1 1 1
X NONE
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TX-SR502/E/8250/HT-R520
2 9 9 4 2 8
(4) Z
1 5 0 5 8 2 9 9 4
m
co
9 9
2 8 9 9