Overview

The LC75373E is an electronic volume control that can implement volume, balance, fader, bass/treble + super bass, loudness, input switching, and input/output level control functions with a minimal number of external components.

Features

• On-chip buffer amplifiers for a minimum of external components.

• Built-in reference voltage generation circuit

• Serial data input: Supports CCB format communication with the system controller.

Functions

• Volume: Provides 81 positions, from 0 dB to –79 dB (in 1-dB steps) and –∞. A balance function can be implemented by controlling the left and right channels independently.

• Fader: This function can attenuate either the rear or the front outputs over 16 positions. (From 0 to –20 dB in 2-dB steps, from –20 to –25 dB in one 5-dB step, from –25 to –45 dB in 10-dB steps, –60 dB, and –∞.)

• Bass/treble: Forms an NF-type tone control circuit with the addition of external capacitors. The base and treble controls each have 15 positions.

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

• Output gain: One of two output of 0 dB and + 6.5 dB can be selected for fader output.

• Input switch: The signal can be selected from one of four inputs for each of the left and right channels.

• Super bass: The position of super bass can be controlled in 11 steps.