INTRODUCTION
The S1A0900X01 is a monolithic integrated circuit which consists of a 3V one-chip tuner and FM multiplex for AM/FM radios and head-phone radios.

FUNCTIONS
• FM Stage: RF/IF/AF amp, Quadrature Detector, MIX, OSC,
   Tuning Indicator.
• AM Stage: RF/IF/AF amp, Detector, MIX, OSC, AGC, Tuning
   Indicator.
• MPX Stage: PLL amp, Decoder, Flip Flop, VCO Stop, Phase
   Detector, Stereo Indicator.

FEATURES
• 3 V one-chip tuner with built-in FM Multiplex
• No AM detect coil, IF coupling capacitor, FM IF by-pass capacitor needed
• Built-in tuning indicator function
• Built-in AM/FM selection switch
• Minimum number of external parts required
• Wide operating voltage range: VCC = 1.8V - 7V
• Low distortion (FM IF: 0.4%, AM IF: 1%, 0.2% (Typ)