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RX-7001PGD
TC9459F (IC331,IC332,IC333) : Electronic volume control
1.Pin layout
1
VSS
2
L-OUT
3
NC
L-IN
4
L-ch
L-LD1
5
L-LD2
6
7
L-A-GND
8
NC
9
CS1
NC
10
GND
11
CK
12
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
1-26
24
VDD
23
R-OUT
22
NC
21
R-IN
20
R-ch
R-LD1
19
R-LD2
18
R-A-GND
17
NC
16
CS2
15
NC
14
STB
13
DATA
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
Data transfer clock input
2. Block diagram
VSS
1
L-OUT
2
3
NC
50k /
91 STEP
4
L-1N
VR
L-LD1
5
6
L-LD2
7
L-A-GND
NC
8
L-ch 7 to 91
decoder
L-ch data
latch circuit
Shift register (24BIT)
Level shift circuit
CS1
9
NC
10
GND
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
NC
15
14
STB
13
DATA
Function
Volume setup serial data input
Data write strobe input
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
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