SerDes uses differential pairs.  On FPGAs, SerDes typically operates from 1,25 to 5 GHz. Serdes may be exposed on the external pins, or it may be used as part of a more complex protocol such as USB or MIPI. GateMate and the Lattice NX33 are low cost FPGAs with exposed SerDes.

High-Speed Serial I/O Made Simple.    View      

Xilinx has a great online book for beginners in this field.



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