The UPC1246C is a single-chip phase-locked loop (PLL) FM stereo multiplex decoder IC produced by NEC. It's designed for use in FM stereo receivers to recover the left and right audio channels from the composite FM stereo signal. This IC provides a complete decoding solution, including pilot tone detection, stereo/mono switching, and audio output amplification.
Applications
- FM stereo receivers
- Car audio systems
- Portable FM radios
- Audio amplifiers with FM tuner
Features
- PLL stereo decoding: Uses a phase-locked loop to accurately decode the FM stereo signal.
- Pilot tone detection: Detects the 19 kHz pilot tone to identify stereo broadcasts.
- Automatic stereo/mono switching: Automatically switches between stereo and mono modes based on the presence of the pilot tone.
- Audio output amplification: Provides amplified left and right audio outputs.
- Low distortion: Delivers high-fidelity audio reproduction.
- Low power consumption: Minimizes power dissipation for portable applications.
Benefits
- High-quality stereo decoding: Delivers accurate and clear stereo sound reproduction.
- Automatic stereo operation: Eliminates the need for manual stereo/mono switching.
- Simplified circuit design: Integrates all necessary functions into a single chip.
- Improved receiver performance: Enhances the overall performance of FM stereo receivers.
- Suitable for portable applications: Low power consumption makes it ideal for battery-powered devices.
Additional Details
The UPC1246C typically operates with a single power supply voltage. The specific voltage requirements can be found in the device's datasheet. External components are required to set the loop filter characteristics and audio output levels. Consult the datasheet for detailed electrical characteristics, pinout information, and application circuit examples, including instructions for setting the loop filter components and audio output gain.
