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25G Clock and Data Recovery Lab Buddy

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Discovery Semiconductors introduced the 25G Clock and Data Recovery (CDR) Lab Buddy for test and measurement applications. Discovery’s reference-free 1:1 CDR Lab Buddy conveniently interfaces with bit error rate test equipment and provides a receive, reshape and retime solution, which is especially important for 25G SFP and 100G QSFP transmission experiments.

The CDR has been configured for variable data rate operation ranging from 24.8Gb/s-28.3Gb/s, and can be operated at sub-rates of /2, /4, /8 and /16 over this full rate operating range. Additionally, the CDR can be used as a clock multiplying unit where a sub-rate clock can be multiplied up to 24.8GHz-28.3GHz.

Additional features include adjustable input equalisation, output data de-emphasis and polarity inversion, adjustable clock & data output amplitude, and a selectable recovered clock output rate ranging from full rate to /128 in binary steps, with optional independently adjustable vertical & horizontal input data decision thresholds.