2.488 Gb/s silicon bipolar clock and data recovery IC for SONET (OC-48)

A Si bipolar IC recovers the clock and retimes the data at 2.488 GHz, while meeting all specifications for SONET (Synchronous Optical Network) OC-48 (optical carrier at 48 times base frequency). This is the first single chip, low power, fully integrated solution in the market. Previous ICs have either required external components or have not been fully compliant with all the specifications. The IC incorporates a voltage controlled oscillator (VCO) with delay tuning that uses integrated spiral inductors. The lock range is broad enough to hold up against process, power supply and temperature variations.