XFI-XAUI integrated circuit for use with 10GBASE-LX4 optical transceivers

A single chip integrated circuit for use in an optical transceiver for converting and coupling an information containing electrical signal with an optical fiber, comprising:

• an XFI interface for exchanging data with an information system device;
• an XAUI interface for exchanging data with a laser transmitter subassembly including first, second, third and fourth lasers operating at different wavelengths and modulated by a respective one of four lane XAUI signals and a receiver subassembly;
• an encoder for encoding an incoming XFI serial signal from the information system device into four lane XAUI format for transmission by the laser transmitter subassembly;
• a decoder coupled to said XAUI interface for receiving said four lane XAUI signals from said receiver subassembly, converting said four lane XAUI signals into a serial XFI signal and applying said serial XFI signal to the XFI interface for transmission to the information system device, wherein the XFI interface, the XAUI interface, the encoder and the decoder are included in the single chip integrated circuit;
• lane synchronization and alignment circuits for each of the four lane XAUI signals coupled to the XAUI interface;
• an 8B/10B decoder coupled to said lane synchronization and alignment circuits to produce unencoded received data;
• a 64B/66B encoder for receiving unencoded received data and encoding it into a 64B/66B serial data stream;
• and
• a first clock and data recovery circuit having an input coupled to the output of the 64B/66B encoder and an output coupled to the XFI interface.