National Semiconductor’s SCAN25100 is an advanced serializer/deserializer (SerDes) for next-generation base station architectures. National’s new common public radio interface (CPRI) SerDes guarantees plus or minus 800 ps delay calibration measurement accuracy and exceeds all CPRI interface signal voltage and jitter requirements. In addition, the SCAN25100 CPRI SerDes uses dual on-board phase-locked loops (PLLs) to automatically synchronize remote radio heads to the digital processing base station.

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In addition to next-generation GSM, CDMA, W-CDMA, CDMA2000, WiMAX, TD-SCDMA and other base station architectures, National’s SCAN25100 CPRI SerDes is also suited for radar, satellite, test equipment, medical imaging, particle accelerator equipment and other high-performance data transfer applications.

Distributed base station architectures decentralize the radio electronics by moving the radio circuits from the base station to their respective antennas. These remote radio heads (RRHs) are a challenge because they introduce interconnect delay and synchronization issues for the central base station. With its patent-pending precision delay calibration measurement (DCM) circuitry and independent transmit and receive PLLs, National’s SCAN25100 CPRI SerDes accurately measures delays and seamlessly synchronizes the RRHs with the central base station without additional components or complicated system intervention.