Block Diagram - Harman Kardon AVR220 Service Manual

AVR220
8-channel analog multiplexer /
demultiplexer
BU4051BC / BU4051BCF / BU4051BCFV
The BU4051BC, BU4051BCF and BU4051BCFV are analog multiplexers / demultiplexers which use three-input digi-
tal signals for control via an 8-channel analog switch.
These products feature high on / off output voltage ratio and low crosstalk between analog switches.
•

Block diagram

•
Logic circuit diagram
V (16)
DD
INH (6)
A (11)
LEVEL
B (10)
CONVERTER
C (9)
V (8)
SS
V (7)
EE
X (13)
0
X (14)
1
X (15)
2
X (12)
3
X (1)
4
X (5)
5
X (2)
6
X (4)
7
X 1
4
CHANNEL
IN / OUT
X
2
6
COMMON
X 3
OUT / IN
X
4
7
CHANNEL
IN / OUT
X
5
5
INH 6
V 7
EE
V
8
SS
BINARY TO 1 of 8
DECODER WITH INHIBIT
X
(3) COMMON
V
16
DD
15 X
2
X
4
X
X
2
6
14 X
1
X
X 1
13 X
0
X X
7 0
X
X
5
3
12 X
3
INH A
11 A
V B
EE
C
10 B
9
C
•
Truth table
INH
L
L
L
L
L
L
L
L
H
X: Irrelevant
75
CHANNEL
IN / OUT
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
harman/kardon
ON SWITCH
X
0
X
1
X
2
X
3
X
4
X
5
X
6
X
7
NONE