The BBT3421 re-timer accepts serial data from the CMLpins, performs clock and data recovery on the bit stream,optionally scans the data for the “comma” patterns, Byte-Aligns the data on either ‘disparity’ comma pattern, and deserializesthe data. The data is then fed into the receiveFIFO, where clock compensation, and optional channelalignment are performed. The parallel data is thenresynchronized into the Transmit FIFO using the localreference clock, serialized to this local reference clock, andsent out to the differential CML, XAUIcompatible TX pins.