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PCB-SIGNAL(4/4)
IC4A5 PCA9540DP
5
SC0
8
SC1
4
SD0
7
SD1
6
VSS
3
POWER-on
VDD
Reset
1
SCL
Input
2
Filter
SDA
PCB-TERMINAL
IC2F0 M52055FP
H
L
1
IN1B
2
SW1
3
H
OUT1
4
GND2
5
OUT2
L
6
OUT3
7
SW3
8
IN3A
L
H
IC330 TDA7496L
VAROUT-R
1,2,3,13,
GND
18,19,20
VOLUME
9
INR
30K
VOLUME
4
INL
30K
10
SVR
6
VOLUME
VAROUT-L
2
I C-Bus
Control
16
IN1A
15
GND1
14
IN2B
13
Vcc
12
SW2
11
INPUTS/OUTPUTS
IN2A
10
GND3
9
IN3B
CHANNEL-SELECT
Vs
7
15,16
14
+
OUTR
-
OP AMP
11
STBY
MUTE/STBY
12
PROTECTIONS
MUTE
60K
17
+
OUTL
-
OP AMP
5
IC4A2 74VHCT541AMTC
1
OE1
2
I0
3
I1
4
I2
5
I3
6
I4
7
I5
8
I6
9
I7
10
GND
OE1
L
H
X
L
H = High Voltage Level
L = Low Voltage Level
Z = Higt Impedance
X = Immaterial
IC300 MC74VHC4052DTR2
12
X
0
14
X
1
15
X
2
11
X
3
ANALOG
1
Y
0
5
Y
1
2
Y
2
4
Y
3
10
A
9
INPUTS
B
6
ENABLE
FUNCTION TABLE
Control Inputs
Select
Enable
B
L
L
L
L
L
H
L
H
H
X
X
: Don't care
B-6
20
Vcc
19
OE2
18
O0
17
O1
16
O2
15
O3
14
O4
13
O5
12
O6
11
O7
TRUTH TABLE
Inputs
Output
OE2
I
L
H
H
X
X
Z
H
X
Z
L
L
L
13
X SWITCH
X
COMMON
OUTPUTS/INPUTS
3
Y SWITCH
Y
PIN 16 = Vcc
PIN 7 = V
EE
PIN 8 = GND
A
ON Channels
L
Y0
X0
H
Y1
X1
L
Y2
X2
H
Y3
X3
X
None
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