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NX-MD1R/NX-MD1
LC75345M (IC302) : Electric volume
1. Terminal layout
VOLDI
1
VOLCE
2
Vss
3
LOPOUT
4
LINM
5
LINP
6
LOUT
7
LSB
8
LBASS2
9
LBASS1
10
LTRE
11
LVRIN
12
LSELO
13
TUL
14
USBL
15
CDL
16
MDL
17
AUXL
18
3. Block diagram
TUL
14
USBL
15
CDL
16
MDL
17
AUXL
18
Vref
19
AUXR
20
MDR
21
CDR
22
USBR
23
TUR
24
1-56
2. Pin functin
Pin No.
1
2
36
VOLCL
3
VDD
35
4
ROPOUT
5
34
RINM
6
33
RINP
32
7
ROUT
31
8
RSB
30
9
RBASS2
29
10
RBASS1
28
RTRE
11
27
RVRIN
26
12
RSELO
25
13
TUR
24
14~18
USBR
23
CDR
22
MDR
21
19
AUXR
20
Vref
19
20~24
25
26
27
28
29
30
31
32
33
34
35
36
13
12
11
10
LVref
Control
circuit
Logic
circuit
Control
circuit
RVref
25
26
27
28
29
Symbol
VOLDI
Serial data pins and clock input pin for control
VOLCE
Chip enable
Vss
Connect to GND
LOPOUT
General-purpose op-amp output pin (Lch)
LINM
Inverted input pins of general-purpose op-amp (Lch)
LINP
Non-inverted input pins of general-purpose op-amp (Lch)
ATT + equalizer output pin / Capacitor connection pins
LOUT
used to configure super bass filter (Lch)
LSB
Capacitor and resistor connection pins for
LBASS2
configuring filter, used for bass band (Lch)
LBASS1
Capacitor connection pins for configuring treble
LTRE
band filter (Lch)
LVRIN
Volume input pins (Lch)
LSEL0
Input selector output pin (Lch)
AUXL,CDL,
Input signal pins (Lch)
MDL,TUL,USBL
Connect a capacitor of few tens of µF between Vreg
Vref
and Avss (VSS) as a analog ground 0.5 X VDD voltage
generator,current ripple cuntermeasures
AUXR,CDR,MDR,TUR,USBR
Input signal pins (Rch)
RSELO
Input selector output pin (Lch)
Volume input pins (Rch)
RVRIN
Capacitor connection pins for configuring treble
RTRE
band filter (Rch)
RBASS1
Capacitor and resistor connection pins for
RBASS2
configuring filter, used for bass band (Rch)
RSB
ATT + equalizer output pin / Capacitor connection
ROUT
pins used to configure super bass filter (Rch)
RINP
Non-inverted input pins of general-purpose op-amp (Rch)
Inverted input pins of general-purpose op-amp (Lch)
RINM
General-purpose op-amp output pin (Rch)
ROPOUT
Power supply
VDD
Serial data pins and clock input pin for control
VOLCL
9
8
7
CCB
interface
30
31
Function
LINP
6
LINM
5
LOPOUT
4
Vss
3
2
CE
VOLDI
1
36
VOLCL
35
VDD
ROPOUT
34
33
RINM
32
RINP
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