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IC, LC75374E
Pin No.
Pin Name
1
RVR IN
2
R COM
3 ~ 5
RT1 ~ RT3
6
RT OUT
7
RS IN
8
NC
9
NC
10 ~ 11
RSB1 ~ RSB2
12
FR IN
13
FR OUT
14
RR OUT
15
VSS
16
CL
17
DI
18
CE
19
VREF
20
RL OUT
21
FL OUT
22
FL IN
23 ~ 24
LSB2 ~ LSB1
25
NC
26
NC
27
LS IN
28
LT OUT
29 ~ 31
LT3 ~ LT1
32
L COM
33
LVR IN
34
LSELO
35
AUX(L)
36
CD(L)
37
TUN(L)
38
TP(L)
39
VDD
I/O
I
4dB volume control input. Must be driven at a low impedance.
–
1dB volume control common pin.
For the connection of capacitors that compensate for bass and treble in the tone control circuits.
–
A high-frequency compensation capacitors must be connected between RT1 and RT2.
A low-frequency compensation capacitors must be connected between RT2 and RT3.
O
Tone control output.
I
Super bass input. Must be driven at a low impedance.
–
Connected to GND.
–
Not connected.
–
For the connection of RCH super bass compensation capacitors.
I
Fader input. Must be driven at a low impedance.
O
Fader output. The front and rear sides can be attenuated independently.
–
GND.
I
Serial data and clock input for control.
Chip enable. Data is written in the internal latch when the chip enable signal goes "L"
–
from "H", and each analog switch is activated. Data transfer is enabled at "H".
Generates a 1/2VDD power source. A capacitor must be connected between VREF and
–
GND as a troubleshooting against power ripples.
O
Fader output. The front and rear sides can be attenuated independently.
I
Fader input. Must be driven at a low impedance.
–
For the connection of LCH super bass compensation capacitors.
–
Not connected.
–
Connected to GND.
I
Super bass input. Must be driven at a low impedance.
O
Tone control output.
For the connection of capacitors that compensate for bass and treble in the tone control circuit.
–
A high-frequency compensation capacitors must be connected between LT1 and LT2.
A low-frequency compensation capacitors must be connected between LT2 and LT3.
–
1dB volume control common pin.
I
4dB volume control input. Must be driven at a low impedance.
O
Input selector output pin.
I
Signal input pins.
–
Power supply.
Description
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