Overview
The LA74302FN is a SPEAKER AMP and MIC AMP built-in audio interface for DSC.

Functions
• Three-wire type SERIAL communications, MIC AMP
• MIC power supply provided
• ALC (ALC LEVEL: level changeover in three stages possible)
• REC/PB LPF (fc=4kHz: 3rd order)
• LINE output (with SERIAL MUTE)
• SPEAKER AMP (compatible with BEEP input MIX)
• With serial communications control electronic VOLUME