Tsi721 Datasheet 52 April 4, 2016
Integrated Device Technology
During the steady-state, the eye mask prevents the transmitter from de-emphasizing the low frequency content of the data too
much and limiting the available signal-to-noise at the receiver. The de-emphasis introduces a jitter artifact that is not accounted
for in this eye mask. This additional jitter is caused by the finite rise/fall time of the transmitter and the non-uniform voltage
swing between the transitions. This additional deterministic jitter must be accounted for as part of the high probability jitter and
is specified in the following table.
Table 28: Level II Medium Run Near-End (Tx) Template Intervals
Characteristic Symbol Near-End MRValue Comments Units
Eye mask T_X1 0.15 - UI
Eye mask T_X2 0.40 - UI
Eye mask T_Y1 200 For connection
to short run Rx
mV
400 For connection
to long run Rx
Eye mask T_Y2 375 For connection
to short run Rx
mV
600 For connection
to long run Rx
Eye mask T_Y3 N/A - mV
Uncorrelated bounded high probability
jitter
T_UBHPJ 0.15 - UIpp
Duty cycle distortion T_DCD 0.05 - UIpp
Total jitter T_TJ 0.30 - UIpp
