SM9501A
The SM9501A is a BiCMOS RCC*1 receiver IC. It accepts low frequency standard wave input received from an external antenna, amplifies it, detects the data signal, and outputs a digital time code signal.
SM9501A.pdf

*1 : Radio controlled clock
Datasheets

Block Diagram

Key Features
- Operating supply voltage range: 2.4 to 3.6V
- Operating current consumption: 55µA (typ) @3V
- Standby current consumption: 0.1µA (max) @3V
- High sensitivity: 0.5µVrms input
- Wide frequency range: 35kHz to 80kHz
- Include analog switch for antenna tuning capacitors change
- AGC gain hold function
- External crystal filter connection
- BiCMOS process
- Package:VSOP-16, Chip form