Overview

The LC75382E is an electronic tone control IC that can implement, with minimal external components, the complete range of tone and volume controls required in a car stereo, including volume, balance, fader, bass and treble, input switching and input level controls.

Features

• Volume: Controls the left and right volume levels

independently from 0 dB to –78 dB (in

2 dB steps) and –∞ dB (41 settings).

Since the left and right levels are

independent this circuit also functions as

a balance control.

• Fader: Attenuates either the rear or front outputs

over 16 levels, from 0 dB to –20 dB in

2 dB steps, from –20 dB to –25 dB in

5 dB step, from –25 dB to –45 dB in

10 dB steps and then to –60 dB and –∞ dB.

• Bass/treble: Implements 21 position bass and treble

controls with the addition of external

capacitors.

• Input selector: Selects one of four inputs for both the

left and right channels. The selected

input signal can be amplified by between

0 dB and +18 dB in 6 dB steps.

• The provision of on-chip operational amplifiers means

that few external components are required.

• Fabricated in a silicon gate process for minimal

switching noise.

• All functions can be controlled by serial data over a

CCB interface.