SANYO LC75374E Datasheet

Ordering number : EN5835

N3098RM (OT) No. 5835-1/17

Overview

The LC75374E is an electronic volume and tone control
circuit that provides volume, balance, fader, bass and
treble, super bass, input switching, and input and output
level controls and requires a minimal number of external
components to implement these functions.

Functions

• Volume: 0dB to –79dB (in 1-dB steps) and –∞dB for a

total of 81 positions.
A balance function can be implemented by
controlling the left and right channels
independently.

• Fader: Allows either the rear or the front channel outputs
to be attenuated over 16 positions.
(0 to –20dB in 2dB steps, –20 to –25dB in a 5dB
step, –25 to –45dB in 10dB steps, –60dB, and
–∞dB for a total of 16 positions.)

• Bass and treble: NF-type tone control circuits are form–

ed using external CR circuits. The bass
and treble can be controlled from 0dB
to +11.9dB (in 1.7dB steps) for a total
of 15 positions.

• Input gain: The input signal can be amplified by 0dB to

+18.75dB (in 1.25dB steps).

• Output gain: The fader output can be set to one of three

settings: 0dB, +6.5dB, or +8.5dB.

• Input switching: Both the left and right channels can be

selected from one of four inputs.

• Super bass: This circuit provides peaking characteristics

(T type characteristics) and 11 position sett–
ings.

Features

• On-chip buffer amplifiers minimizes the number of
external components.

• Built-in reference voltage generator for the analog
ground.

• All controls can be set using the serial data input circuit
(CCB).

Package Dimensions

unit: mm

3148-QIP44MA

SANYO: QIP44MA

[LC75374E]

LC75374E

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Electronic Volume and Tone Control for Car Stereos

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. 5835-2/17

LC75374E

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

DD

max V

DD

11 V

Maximum input voltage V

IN

max CL, DI, CE VSS– 0.3 to VDD+ 0.3 V
Allowable power dissipation Pd max When Ta ≤ 85°C and mounted on a printed circuit board 720 mW
Operating temperature Topr –40 to +85 °C
Storage temperature Tstg –50 to +125 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C, VSS= 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage V

DDVDD

7.5 9.7 V

High-level input voltage V

IH

CL, DI, CE 4.0 V

DD

V

Low-level input voltage V

IL

CL, DI, CE V

SS

1.0 V

Input voltage amplitude V

IN

CL, DI, CE, LVRIN, RVRIN, L1 to L4, R1 to R4, LFIN,

V

SS

V

DD

Vp-p

RFIN, LSIN, RSIN

Input pulse width t

φ

W CL 1 µs

Setup time t

setup

CL, DI, CE 1 µs

Hold time t

hold

CL, DI, CE 1 µs

Operating frequency fopg CL 500 kHz

Allowable Operating Ranges at Ta = –40 to +85°C, VSS= 0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Input Block]

Maximum input gain Gin max +18.75 dB
Step resolution Gstep +1.25 dB
Output load resistance R

L

10 kΩ

Output impedance R

O

LSEL0, RSEL0 : RL= 10 kΩ, f = 1 kHz, VIN= 1 Vrms 46 Ω

[Output Block]

Maximum output gain Gout max +8.5 dB
Output load resistance R

L

10 kΩ

Output impedance R

O

LFOUT, LROUT, RFOUT, RROUT : RL= 10 kΩ,

35 Ω

f = 1 kHz, V

IN

= 1 Vrms

[Volume Control Block]

Step resolution ATstep 1 dB
Step error ATerr

STEP = 0 dB to –20 dB –1 0 +1 dB
STEP = –20 dB to –50 dB –3 0 +3 dB

Output load resistance R

L

10 kΩ

Output impedance R

O

LTOUT, RTOUT : RL= 10 kΩ, f = 1 kHz, VIN= 1 Vrms 46 Ω

[Fader Volume Control Block]

STEP = 0 dB to –20 dB 2 dB

Step resolution ATstep STEP = –20 dB to –25 dB 5 dB

STEP = –25 dB to –45 dB 10 dB

Step error ATerr

STEP = 0 dB to –45 dB –2 0 +2 dB
STEP = –45 dB to –60 dB –3 0 +3 dB

Output load resistance R

L

10 kΩ

Output impedance R

O

LFOUT, LROUT, RFOUT, RROUT : RL= 10 kΩ,

46 Ω

f = 1 kHz, V

IN

= 1 Vrms

[Bass and Treble Control Block]

Bass control range Gbass Max. Boost/Cut ±8 ±11.9 ±13 dB
Treble control range Gtre Max. Boost/Cut ±8 ±11.9 ±13 dB
Output load resistance R

L

10 kΩ

Output impedance R

O

LTOUT, RTOUT : RL= 10 kΩ, f =1 kΩ, VIN= 1 Vrms 46 Ω

Electrical Characteristics at Ta = 25°C, VDD= 8 V, VSS= 0 V

Continued on next page.

No. 5835-3/17

LC75374E

Continued from preceding page.

Pin Assignment

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Super-Bass Block] (T type)

Control range Crange Max. Boost +20 dB
Step resolution ATstep +2.0 dB
Output load resistance R

L

10 kΩ

Output impedance R

O

LSB2, RSB2 : RL= 10 kΩ, f = 1 kHz, VIN= 1 Vrms 70 Ω

[Overall]

Total harmonic distortion THD V

IN

= 1 Vrms, f = 1 kHz, All controls flat overall 0.003 0.01 %

Crosstalk CT V

IN

= 1 Vrms, f = 1 kHz, All controls flat overall, Rg = 1 kΩ 80.5 dB

Output at maximum attenuation Vo min V

IN

= 1 Vrms, f = 1 kHz, Main volume setting: –∞ –80 dB

Output noise voltage

V

N

1 All controls flat overall, (IHF-A), Rg = 1 kΩ 8 µV

V

N

2 All controls flat overall, (DIN-AUDIO), Rg = 1 kΩ 10 µV

High-level input voltage I

IH

CL, DI, CE, VIN= 8 V 10 µA

Low-level input voltage I

IL

CL, DI, CE, VIN= 0 V –10 µA

Electrical Characteristics at Ta = 25°C, VDD= 8 V, VSS= 0 V

Equivalent Circuit

No. 5835-4/17

LC75374E

Control System Timing and Data Format

Applications must input the stipulated serial data to the CE, CL, and DI pins to control the LC75374E. The data consists
of a total of 52 bits, of which 8 bits are address and 44 bits are data.

Note: Bits D36 to D38 and bits D40 to D43 are IC test

data. Applications must set all these bits to 0.

No. 5835-5/17

LC75374E

Address code

Fader step control

Bass control

1dB step control

Fader rear/front

control

Input switching control

Input muting
control

Channel selection

Super bass/super treble control

Treble control

4dB step control

Input gain control

Output gain control

Rear
Front

Initial setting
Lch
Rch
Left and right at
the same time

No. 5835-6/17

LC75374E

Pin Functions

Pin No. Pin Description Notes

• Supply voltage generator (0.525 × VDD) used for the analog ground. A

capacitor must be connected between Vref and V

SS

to remove power

supply ripple.

19 Vref

• Fader outputs. The front and rear outputs can be attenuated
independently.

20
21
14
13

LROUT
LFOUT
RROUT
RFOUT

• Fader inputs

• These inputs must be driven by low-impedance circuits.

22
12

LFIN
RFIN

• Left channel super bass compensation capacitor connection

• Left channel super bass output and compensation capacitor connection

• Right channel super bass compensation capacitor connection

• Right channel super bass output and compensation capacitor
connection

24
23

10
11

LSB1
LSB2

RSB1
RSB2

• Super bass input

• These inputs must be driven by low-impedance circuits.

22

7

LSIN

RSIN

• Tone control outputs

28

6

LTOUT
RTOUT

Continued on next page.