Overview
The LA7477W is a digital video camera audio signal I/O interface IC that integrates on a single chip a block previous implemented with discrete components. The LA7477W integrates the volume control circuit used for both headphones and speakers, and thus supports the implementation of circuit structures ideal for digital video cameras that include an LCD panel.

Features
• Three-wire serial bus control
• Headphone and speaker volume controls (Support for both serial and parallel operation)
• Supports bilingual audio
• Supports record, playback, and overdubbing
• Low-power mode

Functions
• Three inputs (microphone, line 1, line 2)
• ALC (That can be turned on or off)
• Fader circuit
• Low-pass filter (used for both record and playback)
• Electronic volume control circuit
• Deemphasis circuit
• Left + right channel mixer
• Power muting function