Harman Kardon AVR 7200 Service Manual page 112

AVR7200
Triple 2-channel analog multiplexer /
demultiplexer
BU4053BC / BU4053BCF / BU4053BCFV
The BU4053BC, BU4053BCF, and BU4053BCFV are multiplexers / demultiplexers capable of selecting and combin-
ing analog signals and digital signals in a 2 ch
on the switch corresponding to each of the channels. In addition, even if the logical amplitude (V
signal is low, signals with a large amplitude (V
Also, as each switch has a low ON resistance, it can be connected to a low impedance circuit.
•
Block diagram
•
Logic circuit diagram
V (16)
DD
INH (6)
LEVEL
A (11)
CONVERTER
B (10)
C (9)
V (8)
SS
V (7)
EE
X (12)
0
X (13)
1
Y (2)
0
Y (1)
1
Z (5)
0
Z (3)
1
3 configuration. Inhibit signals and control signals are used to turn
-V
DD EE
Y
1
1
Y
2
0
Y
Z 0
3
1
Z
1
Z
4
Z
Z
Z 5 0
0
INH
INH 6
V
EE
V
7
EE
V
8
SS
BINARY TO 1of 2
DECODER WITH INH
(14) X
(15) Y
(4) Z
) can be switched.
16 V
DD
15 Y
Y
1
Y
14 X
X
13
X
X 1
1
X
0
12 X
0
A
11 A
B
C
10 B
9
C
•
Truth table
INH
L
L
L
L
L
L
L
L
H
X: Irrelevant
112
harman/kardon
-V ) of the control
DD SS
A B C
L L L
H L L
L H L
H H L
L L H
H L H
L H H
H H H
X X X
ON SWITCH
X Y Z
0 0 0
X Y Z
1 0 0
X Y Z
0 1 0
X Y Z
1 1 0
X Y Z
0 0 1
X Y Z
1 0 1
X Y Z
0 1 1
X Y Z
1 1 1
NONE