The M21444 is a twelve channel device designed to enable the transmission of multi-gigabit serial data through the most challenging environments. The device features twelve independent, programmable equalizers that equalize data at rates up to 4.25 Gbps. Each input channel also includes an integrated clock and data recovery device retime the input data and remove residual jitter on the signal. The M21444 is ideal for redundancy switch applications for buses that are segmented into groups of four such as XAUI and PCI Express. Hardware switch control allows for very fast switching during failover conditions. The M21444 can also be controlled via an I2C compatible bus or self-configure from an external EEPROM without the need for a host processor. For compatibility with 2.5 Gbps PCI-Express and 3.0 Gbps S-ATA/SAS systems, the M21444 is designed with an electrical idle passthrough function to drive the differential output to the common mode level during OOB signaling. The device is available in a 14x14 mm, 100-pin eTQFP package.
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