Ordering number : ENN7308
13103RM (OT) No. 7308 -1/21
Overview
The LC75348 and LC75348M are electronic volume and
tone control ICs that provide volume, balance, 2-band
equalizer, input gain control, and input switching
functions while requiring a minimal number of external
components.
Functions
Volume: 81 levels: 0 dB to 79 dB (in 1 dB steps) and
.
The left and right channels are controlled independently,
allowing a balance function to be implemented.
Bass: Peaking characteristics bass control with 20 dB
range in 2 dB steps.
Treble: Shelving characteristics treble control with 10
dB range in 2 dB steps.
Selector: One of 4 inputs can be selected for both left
and right channels.
Input gain: Input signal amplification from 0 to +30 dB
(in 2 dB steps)
Features
Built-in buffer amplifiers reduce the number of external
components required.
Fabricated in a silicon gate CMOS process for minimal
switching noise from built-in switches and minimal
switching noise even when there is no input signal.
Built-in zero cross circuits minimize switching noise
when input signals are present.
Built-in V
DD
/2 reference voltage generator circuit.
All functions are controlled from serial data. Supports
the CCB bus.
Package Dimensions
unit: mm
3196-DIP30SD
3216-MFP30SD
(1.04)
1.78
0.95
0.48
10.16
3.95max
(3.25)
0.51min
3.0
0.25
1
15
30
16
8.6
27.0
SANYO: DIP30SD
[LC75348]
LC75348, 75348M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Single-Chip Electronic Volume and
Tone Control System
CMOS IC
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
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.
0.15
15.2
1
15
30
16
(0.6)
1.0
0.4
2.35max
(2.15)
0.1
0.65
7.9
10.5
SANYO: MFP30SD
[LC75348M]
No. 7308 -3/21
LC75348, 75348M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Supply voltage
V
DD
V
DD
4.5
10
V
High-level input voltage
V
IH
CL, DI, CE
2.7
10
V
Low-level input voltage
V
IL
CL, DI, CE
V
SS
1.0
V
Input voltage amplitude
V
IN
CE, DI, CL, L1 to L4, R1 to R4, LIN, RIN
V
SS
V
DD
Vp-p
Input pulse width
tW
CL
1
s
Setup time
tsetup
CL, DI, CE
1
s
Hold time
thold
CL, DI, CE
1
s
Operating frequency
fopg
CL
500
kHz
Allowable Operating Ranges
at Ta = 30 to +75C, V
SS
= 0 V
Parameter
Symbol
Pin name
Conditions
Ratings
Unit
min
typ
max
[Input Block]
Maximum input gain
Gin max
30
dB
Step resolution
Gstep
2
dB
Input resistance
Rin
L1, L2, L3, L4, R1, R2, R3, R4
50
k
Clipping level
Vcl
LSELO, RSELO
THD = 1.0%, f = 1 kHz
2.50
Vrms
Output load resistance
Rl
LSELO, RSELO
10
k
[Volume Control Block]
Input resistance
Rin
LIN, RIN
50
k
Step resolution
Vstep
1
dB
[Treble Band Equalizer Control Block]
Control range
Geq
max. boost/cut
8
10
12
dB
Step resolution
Estep
1
2
3
dB
Internal feedback resistance
Rfeed
51.7
k
[Bass Band Equalizer Control Block]
Control range
Geq
max. boost/cut
18
20
22
dB
Step resolution
Estep
1
2
3
dB
Internal feedback resistance
Rfeed
66.6
k
[Overall Characteristics]
Total harmonic distortion
THD
V
IN
= 1 Vrms, f = 1 kHz,
0.01
%
All controls flat overall
V
IN
= 1 Vrms, f = 1 kHz,
Crosstalk
CT
Rg = 1 k
80
dB
All controls flat overall
Output noise voltage
VN
All controls flat overall
6
V
IHF A
Maximum attenuation
Vomin
All controls flat overall
80
dB
Current drain
I
DD
V
DD
V
SS
= +10 V
40
mA
High-level input current
I
IH
CL, DI, CE: V
IN
= 10 V
10
A
Low-level input current
I
IL
CL, DI, CE: V
IN
= 0 V
10
A
Electrical Characteristics
at Ta = 25C, V
DD
= 9 V, V
SS
= 0 V
Control System Timing and Data Format
The stipulated serial data must be input to the CL, DI, and CE pins to control the LC75348 and LC75348M. The data
structure has a total of 40 bits, of which 8 bits are address and 32 bits are data.
Address code (B0 to A3)
The data has an 8-bit address code, which allows this IC to be used with the SANYO CCB serial bus.
Control code allocation
Address code (LSB)
Input switching control
(L1, L2, L3, L4,
R1, R2, R3, R4)
(82HEX)
No. 7308 -5/21
LC75348, 75348M
CL
DI
B0
B1
B2
B3
A0
D0
A1
A2
A3
D1
D2
D4
D5
D25 D26 D27 D28 D29 D30 D31
D3
CE
1
s
min
1
s
min
1
s
min
1
s
T
DEST
1
s min
1
s min
DI
CL
CE
B0
B1
B2
B3
A0
A1
A2
A3
0
1
0
0
0
0
0
1
D0
D1
D2
D3
Operation
0
0
0
0
L1 (R1) ON
1
0
0
0
L2 (R2) ON
0
1
0
0
L3 (R3) ON
1
1
0
0
L4 (R4) ON
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