Ordering number : ENN6866A
90503TN (OT) / 20901RM (OT) No. 6866-1/24
Overview
The LC75421M is an electronic volume controller that
enables control of volume, balance, fader, bass/treble +
super bass, input switching, and input and output level
control functions using only a small number of external
components.
Functions
Volume: 0 dB to 79 dB in 1-dB steps, and
(81 positions)
Balance function with separate L/R control
Fader: rear output or front output can be attenuated
across 16 positions (in 2-dB steps from 0 dB to -
20 dB, 5-dB steps from 20 dB to 25 dB, 10-dB
steps from 25 dB to 45 dB, and 60 dB,
)
Bass/treble: A tone control circuit can be configured
using an external RC, with 15-position
control from 0 dB to 11.9 dB in 1.7-dB
steps possible for both bass and treble
Input gain: 0 dB to +18.75 dB (1.25-dB steps)
amplification is possible for the input signal.
Output gain: Fader output can be selected among 0 dB,
+6.5 dB, and +8.5 dB.
Input switching: Five input signals can be selected for
Left and for Right
Super bass: Step control with 11 positions is possible,
with peaking characteristics (type T)
Features
On-chip buffer amplifier cuts down number of external
components
Low switching noise generated by on-chip switch due to
use of silicon gate CMOS process
On-chip reference voltage circuit for analog ground
Controls performed with serial input (CCB)
Package Dimensions
unit: mm
3263-MFP36SDJ (375 mil)
1
18
36
19
0.8
15.2
0.3
0.65
10.5
7.9
0.25
(0.8)
2.45max
0.1
(2.25)
SANYO: MFP36SDJ (375 mil)
[LC75421M]
LC75421M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Electronic Volume Controller for Cars
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.
No. 6866-5/24
LC75421M
Parameter
Symbol
Pin Name
Conditions
Ratings
Unit
min
typ
max
Control range
Gbass
MAX. Boost/Cut
10
11.9
14
dB
Step resolution
Estep
1
1.7
3
dB
Internal feedback resistance
Rfeed
45.084
k
Bass Band Control Block
Parameter
Symbol
Pin Name
Conditions
Ratings
Unit
min
typ
max
Control range
Gtre
MAX. Boost/Cut
10
11.9
14
dB
Step resolution
Estep
1
1.7
3
dB
Internal feedback resistance
Rfeed
56.084
k
Treble Band Control Block
Parameter
Symbol
Pin Name
Conditions
Ratings
Unit
min
typ
max
Control range
Crange
MAX. Boost
+20
dB
Step resolution
Estep
+2.0
dB
Internal feedback resistance
Rfeed
66.6
k
Super Bass Block (Type T)
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Total harmonic distortion
THD
V
IN
= 1 Vrms, f = 1 kHz, flat overall
0.003
0.01
%
Crosstalk
CT
V
IN
= 1 Vrms, f = 1 kHz, flat overall, Rg = 1 k
80.5
dB
Maximum attenuated output
Vomin
V
IN
= 1 Vrms, f = 1 kHz, main volume
80
dB
Output noise voltage
VN-1
Fflat overall, (IHF-A), RG = 1 k
8
V
VN-2
Flat overall, (DIN-AUDIO), RG = 1 k
10
V
Input high-level current
I
IH
CL, DI, CE V
IN
= 8 V
10
A
Input low-level current
I
IL
CL, DI, CE V
IN
= 0 V
10
A
General
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