Overview
The LC7535M is an electronic volume and loudness
control IC that provides volume, balance, and loudness
functions with a minimal number of external components
and that can be controlled electronically.
Functions
Volume: Provides 81 positions from 0 dB to 79 dB in
1-dB steps and
. A balance function can be
implemented by controlling the left and right volume
levels independently.
Loudness: A loudness function can be implemented by
attaching external capacitors at the output tap provided
at the 20-dB position in the 5-dB step volume control.
S (select) pin: Up to two LC7535M chips can be used on
the same bus.
Serial data input: The LC7535M supports
communication with the controller in the CCB format.
Feature
High voltage-handling capacity: 16 V.
Package Dimensions
unit: mm
3216A-MFP30S
CMOS IC
53098RM (OT) No. 5760-1/9
SANYO: MFP30S
[LC7535M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Electronic Volume/Loudness Control with Serial Data
Control and High Voltage-Handling Capacity
LC7535M
Ordering number : EN5760
CCB is a trademark of SANYO ELECTRIC CO., LTD.
CCB is SANYO's original bus format and all the bus
addresses are controlled by SANYO.
Parameter
Symbol
Conditions
Ratings
Unit
V
DD
max
V
EE
V
SS
< V
CC
< V
DD
V
SS
to V
SS
+ 18
V
Maximum supply voltage
V
EE
max
V
EE
V
SS
< V
CC
< V
DD
V
SS
18 to V
SS
V
V
CC
max
V
EE
V
SS
< V
CC
< V
DD
V
SS
to V
SS
+ 7
V
V
IN
max1
CL, DI, CE
0 to V
CC
+ 0.3
V
Maximum input voltage
V
IN
max2
L5dBIN, R5dBIN, L1dBIN, R1dBIN
V
EE
0.3 to V
DD
+ 0.3
V
V
IN
max3
S
V
CC
0.3 to V
DD
+ 0.3
V
Allowable power dissipation
Pd max
Ta
75C
250
mW
Operating temperature
Topr
30 to +75
C
Storage temperature
Tstg
40 to +125
C
Specifications
Absolute Maximum Ratings
at Ta = 25C, V
SS
= 0 V
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
V
DD
V
DD
V
CC
+ 4.5
16
V
Supply voltage
V
EE
V
EE
16
0
V
V
CC
V
CC
4.5
5
5.5
V
Input high-level voltage
V
IH
1
CL, DI, CE
0.8 V
CC
V
CC
V
V
IH
2
S
0.8
(V
DD
V
CC
) + V
CC
V
DD
V
Input low-level voltage
V
IL
1
CL, DI, CE
V
SS
0.2 V
CC
V
V
IL
2
S
V
CC
0.2
(V
DD
V
CC
) + V
CC
V
Allowable Operating Ranges
at Ta = 25C, V
SS
= 0 V
Continued on next page.
No. 5760-2/9
LC7535M
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Input voltage amplitude
V
IN
L5dBIN, R5dBIN, L1dBIN, R1dBIN
V
EE
V
DD
Vp-p
Input pulse width
t
w
CL
1
s
Setup time
t
set up
CL, DI, CE
1
s
Hold time
t
hold
CL, DI, CE
1
s
Operating frequency
t
opg
CL
500
kHz
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Total harmonic distortion
THD
V
IN
= 1 Vrms, f = 1 kHz,
0.002
%
With all tone control settings flat, V
DD
V
EE
= 30 V
V
IN
= 1 Vrms, f = 1 kHz,
Crosstalk
C
T
With all tone control settings flat, RG = 1 k
,
70
dB
V
DD
V
EE
= 30 V
Output at maximum attenuation
V
Omin
V
IN
= 1 V rms, f = 1 kHz, with the volume set at
,
95
dB
V
DD
V
EE
= 30 V
Output noise voltage
V
N
With all tone control settings flat, Rg = 1 k
2
10
V
IHF-A, V
DD
V
EE
= 30 V
Total resistance
Rvol1
5-dB volume control block
75
k
Rvol2
1-dB volume control block
20
k
L5dBIN, R5dBIN, LCT1, RCT1, LCT2, RCT2, L5dBOUT,
Output off leakage current
I
OFF
R5dBOUT, L1dBIN, R1dBIN, L1dBOUT, R1dBOUT, LVM,
10
+10
A
RVM
Input high-level current
I
IH
CL, DI, CE : V
IN
= V
CC
10
A
Input low-level current
I
IL
CL, DI, CE : V
IN
= V
SS
10
A
Current drain
I
DD
V
DD
= 16 V
1
mA
I
CC
V
CC
= 5.5 V
1
mA
Electrical Characteristics
at Ta = 25C, V
SS
= 0 V
Equivalent Circuit
Sample Application Circuit
No. 5760-3/9
LC7535M
Test Circuit
Total Harmonic Distortion
With an identical circuit for the right channel
Output Noise Voltage
No. 5760-4/9
LC7535M
Crosstalk
Pin Assignment
With an identical circuit for the right channel
No. 5760-5/9
LC7535M
Pin Descriptions
Pin No.
Pin
Function
Equivalent circuit
5-dB step attenuator inputs
These inputs must be driven by low-impedance circuits.
2
L5dBIN
29
R5dBIN
Loudness circuit connections
Connect the high-band compensation capacitors between the CT1 and 5dBIN pins, and
connect the low band compensation capacitors between the CT2 and the V
M
pins.
5-dB step attenuator outputs
These outputs must be accepted by circuits with an impedance of between 47 k
and 1 M
.
3
LCT1
28
RCT1
4
LCT2
27
RCT2
5
L5dBOUT
26
R5dBOUT
1-dB step attenuator inputs
These inputs must be driven by low-impedance circuits.
7
L1dBIN
24
R1dBIN
1-dB step attenuator outputs
These outputs must be accepted by circuits with an impedance of between 47 k
and 1 M
.
8
L1dBOUT
23
R1dBOUT
Common connections for the volume control circuit. The impedance of the printed circuit board
pattern connected to these pins must be kept as low as possible. Since the LV
M
, RV
M
, and V
SS
pins are not connected internally, they must be connected externally as required by the various
specifications. When a single-sided power supply is used, the capacitors between V
M
and V
SS
become the residual resistance when the volume control is set at its maximum attenuation. This
means that care is required in selecting the values of these capacitors.
9
LV
M
Selection input for the address code in the data format. If this pin is connected to V
DD
, data will
be accepted when the address code is 9, and if connected to V
CC
, data will be accepted when
the address code is 8.
12
S
22
RV
M
Input pins for the serial data used to control the device.
These inputs must have an amplitude of 0 to 5 V. In applications in which any of microcontroller
CL, DI, or CE may go high in backup mode (when V
DD
= V
CC
= 0 V), the signal lines must have
series resistors of at least 2 k
inserted.
17
CL
Power supply connections. All these pins must be connected to the corresponding power
supply voltage. When power is first applied, the V
CC
voltage must not rise before V
DD
.
10
V
EE
18
DI
19
CE
Unconnected (NC) pins
Do not connect any signals or devices to these pins.
1, 6, 11,
15, 16,
20, 25,
30
NC
13
V
DD
14
V
SS
21
V
CC
PDF 
ZIP