Overview
The LA8520M is an I/O switching audio signal-processing IC for use in facsimile units and telephones. It integrates a crosspoint switch, a BTL power amplifier, an electronic volume control, a microphone amplifier, and other functions on a single chip.

Features
• Built-in BTL power amplifier (8 to 32 Ω load): VCC = 5 V, RL = 16 Ω, Pomax = 250 mW
• Electronic volume control (BTL power amplifier system: seven 4-dB steps, receiver amplifier system: two 3-dB steps)
• Low switching noise, low crosstalk characteristics (crosspoint switch)

Functions
• Crosspoint switch (equivalent to an 8 × 8 switch)
• BTL power amplifier
• Electronic volume control
• Serial interface

Applications
    Personal facsimile units and telephones