The MoSys® LineSpeed™ Flex MSH420 28G 2:1 MUX IC is a flexible SerDes device for multiplexing slower rate 10-14G data rates into single 20-28G lanes and de-multiplexing on the return path.
The MSH420 has two banks of SerDes, referred to as A Side and B Side, connected together by a digital section. The A side can support up to 10 lanes and the B side can support up to 5 lanes. Tracing the data path in either direction, the input data goes to an equalizer for opening the eye, a data slicer for digitizing the data, a clock & data recovery block for retiming, a serial to parallel converter, a digital section for data translation (MUX A to B and DeMUX B to A), a parallel to serial converter, transmit de-emphasis to add optional pre-cursor and post cursor, and an output driver.
The device is packaged in a small 17x17mm FCCSP for module or daughter card applications.