DVR-220-S
99
5
6
7
8
5
6
7
8
C
D
F
A
B
E
• Electric Volume IC
11
10
L4
LSELO
9
LIN
8
LTRE
7
LBASS1
8
LBASS2
5
4
LOUT
TEST
2 CE
3 VSS
1 DI
30 CL
28 Vref
27 NC
29 VDD
12
L3
13
L2
14
L1
15
NC
20
R4
19
R3
18
R2
17
R1
16
NC
21
RSELO
22
RIN
23
RTRE
24
RBASS1
25
RBASS2
26
ROUT
Control
Circuit
Logic
Circuit
CCB
Interface
LVref
RVref
Control
Circuit
No.
Pin Name
Function
No.
Pin Name
Function
1
DI
Serial data input for control
16
NC
Not connected
2
CE
Chip enable pin
Data are written in the internal latch by a timing
of "H"
→
"L", and each analog switch works.
Data transfer is enabled by "H" level.
17
R1
Input signal pin
3
VSS
Ground pin
18
R2
4
TEST
Pin for electronic volume test
Set to VSS electric potential.
19
R3
5
LOUT
Volume and equalizer output pin
20
R4
6
LBASS2
Capacitor and resistor connection pins for bus
bandpass filter
21
RSELO
Input selector output pin
7
LBASS1
22
RIN
Volume and equalizer input pin
8
LTRE
Capacitor connection pin for treble bandpass
filter
23
RTRE
Capacitor connection pin for treble bandpass
filter
9
LIN
Volume and equalizer input pin
24
RBASS1
Capacitor and resistor connection pins for bus
bandpass filter
10
LSELO
Input selector output pin
25
RBASS2
11
L4
Input signal pins
26
ROUT
Volume and equalizer output pin
12
L3
27
NC
Not connected
13
L2
28
Vref
0.5XVDD voltage generation block
14
L1
29
VDD
Power supply pin
15
NC
Not connected
30
CL
Clock input pin for control
LC75342M (JCKB ASSY : IC601)
Pin Function
Block Diagram