25 of 47

March 31, 2008

IDT80KSW0004

Datasheet

Table 23 Receiver AC Timing Specifications - 3.125 GBaud

NOTE:

1. Total jitter is composed of three components, deterministic jitter, random jitter and single frequency sinusoidal jitter. The sinusoidal jitter may have

any amplitude and frequency in the unshaded region of Figure 16. The sinusoidal jitter component is included to ensure margin for low frequency jitter,

wander, noise, crosstalk and other variable system effects.

Figure 16 Single Frequency Sinusoidal Jitter Limits

Symbol

Parameter

Range

Unit

Notes

Min

Max

VIN

Differential Input Votlage

200

1600

mV p-p

Measured at receiver

JD

Deterministic Jitter Tolerance

0.37

-

UI p-p

Measured at receiver

JDR

Combined Deterministic and

Random Jitter Tolerance

0.55

-

UI p-p

Measured at receiver

JT

Total Jitter Tolerance(1)

0.65

-

UI p-p

Measured at receiver

SMI

Multiple Input Skew

-

22

ns

Skew at the receiver input

between lanes of a multi-

lane link

BER

Bit Error Rate

10-12

UI

Unit Interval

320

320

ps

+/- 100 ppm