The Si5540 is a fully integrated low-power transmitter for high-speed serial communication systems. It combines high speed clock generation with a 16:1 multiplexer to serialize data for OC-192/STM-64 applications. The Si5540 is based on Silicon Laboratories' DSPLLTM technology which eliminates the external loop filter components required by traditional clock multiplier units. In addition, selectable loop filter bandwidths are provided to ensure superior jitter performance while relaxing the jitter requirements on external clock distribution subsystems. Support for data streams up to 10.7 Gbps is also provided for applications that employ forward error correction (FEC). The Si5540 represents a new standard in low jitter, low power and small size for 10 Gbps serial transmitters. It operates from a single 1.8 V supply over the industrial temperature range (40C to 85C).