The BCM47768KUB1G is a Broadcom BCM4776-family dual-frequency Global Navigation Satellite System receiver designed primarily for smartwatches, fitness trackers, and other space- and power-constrained wearable devices. Public chipset information identifies the BCM47768 as the wearable-oriented member of the second-generation BCM4776 GNSS family.
The receiver supports L1 and L5 dual-frequency operation across major satellite constellations, including GPS, GLONASS, BeiDou, Galileo, QZSS, and NavIC. Supported signal groups include L1/B1/E1 and L5/E5a/B2a, allowing the receiver to combine conventional L1 signals with newer L5-band measurements.
Dual-frequency operation improves the receiver’s ability to identify and mitigate multipath errors caused by satellite signals reflecting from nearby buildings. Support for additional L5-band signals, including BeiDou-3 B2a, also increases signal availability and improves positioning reliability in urban environments.
The platform incorporates an integrated sensor hub and on-chip position, velocity, and time processing. It can operate with external motion sensors such as accelerometers and gyroscopes, while an integrated LTE coexistence filter helps protect weak GNSS signals from nearby cellular interference.
Android and RTOS platforms are supported, making the receiver suitable for wearable devices, mobile accessories, and compact tracking products. Public teardown reports identify the BCM47768 as the GNSS positioning device used in the Xiaomi Watch S1 smartwatch.
The BCM47768KUB1G is supplied in a compact BGA-class surface-mount package intended for high-density PCB assembly. Broadcom does not publicly expose a complete package drawing or detailed electrical datasheet for this exact orderable code, so ball assignment, package dimensions, land pattern, supply requirements, and interface implementation should be verified using controlled manufacturer documentation.
Broadcom’s current public GNSS catalog mainly presents the newer BCM4778 generation and does not publicly list the lifecycle status of BCM47768KUB1G. This does not by itself confirm discontinuation, but lifecycle, firmware availability, lead time, and minimum order quantity should be verified before using the device in a new design.
Key Specifications
- Manufacturer: Broadcom
- Manufacturer Part Number: BCM47768KUB1G
- Product Family: BCM4776
- Device Type: Multi-Constellation GNSS Receiver SoC
- Target Market: Smartwatches and Wearable Devices
- GNSS Bands: Dual-Frequency L1 and L5
- Signal Groups: L1/B1/E1 and L5/E5a/B2a
- GPS Support: Yes
- GLONASS Support: Yes
- BeiDou Support: Yes
- Galileo Support: Yes
- QZSS Support: Yes
- NavIC Support: Yes
- Navigation Output: Position, Velocity, and Time
- Multipath Mitigation: Supported
- LTE Coexistence Filtering: Integrated
- Sensor Hub: Integrated
- PVT Processing: On-Chip
- Operating-System Support: Android and RTOS
- Package Class: Compact BGA Surface-Mount Package
- Mounting Type: Surface Mount
- Typical Markets: Wearables, Mobile Accessories, and Compact Trackers
The listed functional specifications are based on public BCM4776-family information and official documentation for the related SYN47768 platform. Detailed electrical and mechanical specifications should be verified using Broadcom-controlled documentation.
Typical Applications
Suitable for smartwatches, fitness trackers, outdoor sports devices, mobile accessories, personnel and asset trackers, and other low-power positioning products. Its dual-frequency, multi-constellation capability is particularly useful in dense urban areas and other environments affected by reflected satellite signals.
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