Burst Clock Data Recovery for 1.25G/2.5G PON Applications in UltraScale Devices (XAPP1277)

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1.2 English

XG-PON and NG-PON2 are ITU-T next-generation optical access technology. One of the most challenging components in the PON environment is the BCDR, operating on burst signals at 2.488 Gb/s and 1.244 Gb/s. Based on a fully synchronous oversampling technology, the implementation of the BCDR described in this application note is well suited to AMD Kintex™ UltraScale™ and AMD Virtex™ UltraScale™ FPGAs due to the low required minimum oversampling ratio and the highly pipelined oversampling technology. The speed grade requirement is driven by the GTH transceivers, which should run at a minimum of 12.44 Gb/s, that is, five times the line rate or more.