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TC9459F (IC381, IC382, IC383, IC384) : Electronic volume control
1.Pin layout
VSS
1
24
L-OUT
2
23
3
22
NC
4
21
L-IN
L-ch
5
20
L-LD1
6
19
L-LD2
L-A-GND
7
18
NC
8
17
CS1
9
16
10
15
NC
11
14
GND
12
13
CK
3.Pin function
Pin No.
Symbol
1
VSS
2
L-OUT
3
NC
4
NC
5
L-LD1
6
L-LD2
7
L-A-GND
8
NC
9
CS1
10
NC
11
NC
12
CK
2. Block diagram
VDD
L-OUT
R-OUT
NC
R-IN
L-1N
R-ch
R-LD1
R-LD2
L-LD1
R-A-GND
L-LD2
NC
CS2
L-A-GND
NC
STB
DATA
CS1
GND
Function
Negative power supply pin
Volume output pin
No connection
No connection
Loudness tap output pin
Loudness tap output pin
Analog GND pin
No connection
Chip select input pin
No connection
No connection
Clock input pin
VSS
1
2
3
NC
50k
/
915TEP
4
VR
5
6
7
NC
8
L-ch 7 to 91
decoder
L-ch data
latch circuit
Shift register (24BIT)
Level shift circuit
9
NC
10
11
CK
12
Pin No.
Symbol
13
DATA
14
STB
15
NC
16
CS2
17
NC
18
R-A-GND
19
R-LD2
20
R-LD1
21
R-IN
22
NC
23
R-OUT
24
VDD
VDD
24
R-OUT
23
NC
22
R-IN
21
Same as L-ch
R-LD1
20
Circuit
R-LD2
19
R-A-GND
18
NC
17
R-ch 7 to 91
decoder
R-ch data
latch circuit
16
CS2
15
NC
14
STB
DATA
13
Function
Data input pin
Strobe input pin
No connection
Chip select input pin
No connection
Analog GND pin
Loudness tap output pin
Loudness tap output pin
Volume input pin
No connection
Volume output pin
Positive power supply pin
RX-8022PSL
1-25
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