DESCRIPTION
PT2318 is a sound fader controller IC utilizing CMOS Technology specially designed for car radio hi-fi audio applications. Four selectable stereo inputs,1 mono input, bass, treble, volume, balance and fader controls, mute function and a special loudness feature which isautomatically controlled in combination with the volume level setting are all built into a single I2 C bus controlled stereo preamplifier chip having the highest performance and reliability. Pin assignments and application circuits are optimized for easy PCB layout and cost saving advantages.

FEATURES
• CMOS technology
• I2C bus control interface
• 4 selectable stereo inputs
• 1 mono input
• Volume, Balance and Fader controls
• Bass & Treble controls
• Noise reduction circuit interface provided
• External equalizer interface provided
• Mute control at audio signal zero crossing
• Internal power-on reset function
• Mute function controlled via the I2C bus or pin
• Special automatic loudness feature in combination with the volume setting

APPLICATIONS
•Car audio
• Hi-Fi audio applications