JVC RX-7030VBK Service Manual page 38

4.29 TC9459F-X (IC381 to IC384) : Electronic volume control
• Pin layout
VSS
L-OUT
NC
L-IN
L-ch
L-LD1
L-LD2
L-A-GND
NC
CS1
NC 10
GND 11
12
CK
• Pin function
Pin No. Symbol
1 VSS Negative power supply pin
2 L-OUT Volume output pin
3 NC No connection
4 NC No connection
5 L-LD1 Loudness tap output pin
6 L-LD2 Loudness tap output pin
7 L-A-GND Analog GND pin
8 NC No connection
9 CS1 Chip select input pin
10 NC No connection
11 NC No connection
12 CK Clock input pin
1-38 (No.22058)
1 24
VDD
2 23
R-OUT
3 22
NC
4 21
R-IN
5 20 R-ch
R-LD1
6 19
R-LD2
7 18
R-A-GND
8 17
NC
9 16
CS2
15
NC
14
STB
13
DATA
Function
• Pin function
VSS
1
L-OUT 2
3
NC
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 Data input pin
14 STB Strobe input pin
15 NC No connection
16 CS2 Chip select input pin
17 NC No connection
18 R-A-GND Analog GND pin
19 R-LD2 Loudness tap output pin
20 R-LD1 Loudness tap output pin
21 R-IN Volume input pin
22 NC No connection
23 R-OUT Volume output pin
24 VDD Positive power supply pin
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
STB
14
13 DATA
Function