Overview

The LC75342 and LC75342M are electronic volume and tone control systems that provide volume, balance, a 2-band equalizer, and input switching functions that can be controlled from serially transferred data.

Features

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

• Fabricated in a silicon gate CMOS process to minimize switching noise from internal switches.

• Built-in analog ground reference voltage generation circuit.

• All controls can be set from serially transferred data. Supports the CCB standard.

Functions

• Volume: 0 dB to –79 dB (in 1-dB steps) and –∞, for a total of 81 settings.

The volume can be controlled independently in the left and right channels to implement a balance function.

• Bass boost: Up to +20 dB in 2-dB steps. Peaking characteristics.

• Treble: ±10 dB in 2-dB steps. Shelving characteristics.

• Selector: One of four sets of left/right inputs can be selected.

• Input gain: The input signal can be boosted by from 0 dB to +30 dB in 2-dB steps.