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IC305, 405 TDA8574 (T)
VCCL
1
2
INL
BUFFER
SVRL
3
BUFFER
REFERENCE
INML
4
INMR
5
REFERENCE
BUFFER
SVRR
6
BUFFER
INR
7
VCCR
8
IC382 CXA1846N
20
19
18
17
16
–
8dB STEP
+
VOLUME
LATCH
LATCH
CONTROL
SHIFT
REGISTER
8dB STEP
+
VOLUME
–
1
2
3
4
5
VCCL
CL+
16
15
CL–
LIFT
AMP
VCCL
LGND
14
SIGNAL
AMP
OUTL
13
VCCR
12
OUTR
SIGNAL
AMP
11
RGND
VCCR
LIFT
AMP
10
CR–
9
CR+
15
14
13
12
11
1dB STEP
VOLUME
VCT
ZC
BUFFER
DET
1dB STEP
VOLUME
6
7
8
9
IC381 BU4052BCFV-E2
2X0
1
2X2
2
2XCOM
3
2X3
4
2X1
5
INH
6
7
VEE
VSS
8
IC552 RN5VD23AA-TL
1
IC571 BA8270F-E2
10
BUS ON
RST
BATT
CLK
VREF
DATA
GND
– 39 –
16
VDD
15
X2
14
X1
13
XCOM
12
X0
11
X3
10
A
9
B
5
VREF
+
–
2
BUS ON
14
VCC
1
SWITCH
RESET
2
13
RST
SWITCH
12
BUS ON
11
CLK IN
BATTERY
3
10
BU IN
SWITCH
4
5
6
9
DATA IN
7
8
DATA OUT
4
3
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