The MSH420 has a “bit-level” 2:1 serial Mux/Demux function which is agnostic to the data payload of the two lower-speed links. However, they must be operating at the same baud rate (i.e. “0 ppm” frequency offset). The MSH420 also includes optional Retimer and Redundant Link modes (contact factory). The electrical interfaces support IEEE and OIF specifications in the 10-14G and 20-28G ranges.

Configuration of the device is supported through an I2C, MDIO or SPI interface.  The device supports IEEE and OIF 10/11G and 25/28G specifications. It includes on-chip PRBS generation and error checking, along with reverse polarity control of differential inputs and outputs.