SANYO LC75386NE Datasheet

Overview

The LC75386NE is an electronic volume and tone control
IC that can implement a wide range of functions including
volume, balance, fader, bass and treble controls, loudness,
input switching, and input gain control with a minimal
number of external components.

Functions

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

a total of 81 settings.
A balance function can be implemented
by controlling the left and right channel
volume settings independently.

• Fader: Th e rea r or t he f ront outp uts can be
attenuated over 16 settings.
(0 to –2 dB in 1-dB steps, –2 to –20 dB
in 2 dB steps, –20 to –30 dB in 10-dB
steps, –45 dB, -60 dB, and –∞ for a
total of 16 settings.)

• Bass and treble: Control over a ±12-dB range in 2-dB
steps in each band.

• Input gain: The input signal can be amplified from
0 to +18.75 dB (in 1.25-dB steps).

• Input switching: O ne o f 6 i nputs can be selected for
each of the left and right channels.
(Five are single-ended inputs, and one
is a differential input.)

• Loudness: Taps a re output from t he –32-dB
positions of the 2-dB step volume
ladder resistors, and loudness operation
can be implemented by attaching
external capacitors.

Features

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

• The low level of switching noise generated from internal
switches due to fabrication in a CMOS process
minimizes switching noise when no input signals are
present.

• The use of built-in zero-cross switching circuits
minimizes switching noise when input signals are
present.

• Built-in VDD/2 reference voltage generation circuit

• All controls are controlled from CCB serial data input.

Package Dimensions

unit: mm

3159-QFP64E

CMOS IC

51298RM (OT) No. 5937-1/20

Preliminary

SANYO: QFP64E

[LC75386NE]

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 Stereo Systems

LC75386NE

Ordering number : EN*5937

• 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.

Pin Assignment

No. 5937-2/20

LC75386NE

Top view

Equivalent Circuit and Application Circuit Diagram

No. 5937-3/20

LC75386NE

No. 5937-4/20

LC75386NE

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

DD

max V

DD

11 V

Maximum input voltage V

IN

max All input pins VSS– 0.3 to VDD+ 0.3 V
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

6.0 10.5 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 amplitude V

IN

V

SS

V

DD

Vp-p
Input pulse width TøW CL 1 µs
Setup time Tsetup CL, DI, CE 1 µs
Hold time Thold CL, DI, CE 1 µs
Operating frequency fopg CL 500 kHz

Allowable Operating Ranges at Ta = 25°C, VSS= 0 V

Parameter Symbol Applicable pins Conditions

Ratings

Unit

min typ max
Input resistance Rin L1 to L4, L6, R1 to R4, R6 35 50 65 kΩ
Minimum input gain Ginmin L1 to L4, L6, R1 to R4, R6 –1 0 +1 dB
Maximum input gain Ginmax +16.5 +18.75 +21 dB
Inter-step setting error ATerr ±0.6 dB
Left/right balance BAL ±0.5 dB

Electrical Characteristics at Ta = 25°C, VDD= 9 V, VSS= 0 V

Input Block

Parameter Symbol Applicable pins Conditions

Ratings

Unit

min typ max
Input resistance Rvr LVRIN, RVRIN, Loudness off 158 226 294 kΩ
Inter-step setting error ATerr ±0.5 dB
Left/right balance BAL ±0.5 dB

Volume Control Block

Parameter Symbol Applicable pins Conditions

Ratings

Unit

min typ max
Inter-step setting error ATerr ±1.0 dB
Bass control range Gbass max. boost/cut ±9 ±12 ±15 dB
Treble control range Gtre max. boost/cut ±9 ±12 ±15 dB
Left/right balance BAL ±0.5 dB

Tone Control Block

No. 5937-5/20

LC75386NE

Parameter Symbol Applicable pins Conditions

Ratings

Unit

min typ max
Input resistance Rfed LFIN, RFIN 25 50 100 kΩ

0 dB to –2 dB ±0.5 dB

Inter-step setting error ATerr

–2 dB to –20 dB ±1 dB
–20 dB to –30 dB ±2 dB
–30 dB to –60 dB ±3 dB

Left/right balance BAL ±0.5 dB

Fader Control Block

Parameter Symbol Conditions

Ratings

Unit

min typ max

Total harmonic distortion

THD1 V

IN

= –10 dBV, f = 1 kHz 0.004 0.01 %

THD2 V

IN

= –10 dBV, f = 10 kHz 0.006 0.01 %

Inter-input crosstalk CT V

IN

= 1 Vrms, f = 1 kHz 80 88 dB

Left/right crosstalk CT V

IN

= 1 Vrms, f = 1 kHz 80 88 dB

Maximum attenuation

Vomin1 V

IN

= 1 Vrms, f = 1 kHz 80 88 dB

Vomin2 V

IN

= 1 Vrms, f = 1 kHz, INMUTE, Fader: –∞ 90 95 dB

Output noise voltage

VN1 All flat, IHF-A filter 5 10 µV
VN2 All flat, 20 Hz to 20 kHz bandpass filter 7 15 µV

Current drain I

DD

33 40 mA

High-level input current I

IH

CL, DI, CE, VIN= 9 V 10 µA

Low-level input current I

IL

CL, DI, CE, VIN= 0V –10 µA

Maximum input voltage V

CL

THD = 1%, RL = 10 kΩ, All flat, fIN= 1 kHz 2.5 2.9 Vrms

Overall Characteristics

Control System Timing and Data Format

The LC75386NE is controlled by inputting stipulated data serially to the CL, DI, and CE pins. The data consists of a total
of 52 bits, of which 8 bits are the address and 44 bits are the actual control data.

Note*: The minimum value is determined by the value of the capacitor connected to the TIM pin (pin 20).

If the value of the capacitor is C

TIM

and the minimum value is TDmin, then:

T

D

min = 3 × 103× C

TIM

If C

TIM

is 0.033 µF, then:

T

D

min = 3 × 103× 0.033 × 10–6≈ 100 µs

• Address Code (B0 to A3)
The LC75386NE has an 8-bit address code and can be used on a bus shared with other Sanyo ICs.
Address Code

• Control code allocation
Input Switching Control

(LSB) (81HEX)

B0 B1 B2 B3 A0 A1 A2 A3

10000001

No. 5937-6/20

LC75386NE

D0 D1 D2

0 0 0 L1 (R1)
1 0 0 L2 (R2)
0 1 0 L3 (R3)
1 1 0 L4 (R4)
0 0 1 L5 (R5)
1 0 1 L6 (R6)
0 1 1 IC test values: These values must not be used during normal operation.
111

D3 IC test bit: This bit must be set to 0.

Input Gain Control

D4 D5 D6 D7

00000 dB
1 0 0 0 +1.25 dB
0 1 0 0 +2.50 dB
1 1 0 0 +3.75 dB
0 0 1 0 +5.00 dB
1 0 1 0 +6.25 dB
0 1 1 0 +7.50 dB
1 1 1 0 +8.75 dB
0 0 0 1 +10.0 dB
1 0 0 1 +11.25 dB
0 1 0 1 +12.5 dB
1 1 0 1 +13.75 dB
0 0 1 1 +15.0 dB
1 0 1 1 +16.25 dB
0 1 1 1 +17.5 dB
1 1 1 1 +18.75 dB