AM / FM IF + FM St DET (for digital tuning system)

TA2057N and  TA2507F are the AM / FM IF + FM St DET system ICs, which is designed for DTS radios. These are  included many functions and these can be used for Digital Tuning System with IF Counter. 

FEATUREs
• Suitable for combination with digital tuning system which has IF counter.
• One terminal type AM / FM IF count output (auto stop signal) for IF counter of digitl tuning system.
• Built−in mute circuit for IF count output.
• Adjustable for IF count output sensitivity by external resistance of pin(2) (AM), and pin(3) (FM).
• For adopting ceramic discriminator and ceramic resonator, it is not necessary to adjust the FM quad detector
circuit and FM st DET vco circuit.
• Built−in AM local oscillator buffer output circuit.
• Built−in AM IF buffer output circuit for AM stereo.
• Operating supply voltage range (Ta = 25°C)
   TA2057N: VCC= 3.5~14V
   TA2057N: VCC= 3.5~9V