INTRODUCTION
The S1A0429A01 is a monolithic integrated circuit designed for Portable FM radios.
It consists of an RF input stage, mixer, IF, mute control and loop (earphone drive) Amp.
It is suitable for a pocket-size radio.

FUNCTIONS
• RF input stage 
• Local OSC
• Mixer 
• IF Amp
• Mute control 
• Earphone drive amp

FEATURES
• Minimum number of external parts required
• Single trimmer tuning
• No FM det coil
• FLL IF detect system (76kHz)
• Operating voltage: VCC = 1.8V - 6.0V