SNLS696A April 2021 – May 2021 TSER953
The link between the TSER953 and the companion deserializer has two distinct data paths. The first path is a forward channel which is nominally running at up to 4.16 Gbps and is encoded such that the channel occupies a bandwidth from 20 MHz to 2.1 GHz. The second path is a back channel from the deserializer to the serializer which occupies a frequency range nominally from 10 MHz to 50 MHz.
For these two communications links to operate properly, the circuit between the serializer and the deserializer must present a characteristic impedance of 50 Ω. Deviations from this 50-Ω characteristic will lead to signal reflections either at the serializer or deserializer, which will result in bit errors.