TSI721 datasheet(52/67 Pages) RENESAS

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Tsi721 Datasheet

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

Eye mask

T_X2

0.40

Eye mask

T_Y1

200

For connection

to short run Rx

400

For connection

to long run Rx

Eye mask

T_Y2

375

For connection

to short run Rx

600

For connection

to long run Rx

Eye mask

T_Y3

N/A

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

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