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March 31, 2008

IDT80KSW0004

Datasheet

Table 18 Long Run Transmitter AC Timing Specifications - 2.5 GBaud

Table 19 Long Run Transmitter AC Timing Specifications - 3.125 GBaud

For each baud rate at which an LP-Serial transmitter is specified to operate, the output eye pattern of the transmitter falls entirely within the unshaded

portion of the Transmitter Output Compliance Mask shown in Transmitter Output Compliance Mask (Figure 15) with the parameters specified in

Transmitter Differential Output Eye Diagram Parameters (Table 17) when measured at the output pins of the device and the device is driving a 100

Ohm +/- 5% differential resistive load. The specification allows the output eye pattern of a LP-Serial transmitter that implements pre-emphasis (to

equalize the link and reduce inter-symbol interference) to only comply with the Transmitter Output Compliance Mask when pre-emphasis is disabled

or minimized.

Symbol

Parameter

Range

Unit

Notes

Min

Max

VO

Output Voltage

-0.40

2.30

Volts

Voltage relative to COM-

MON of either signal com-

prising a differential pair.

VDIFF PP

Differential Output Voltage

800

1600

mV p-p

JD

Deterministic Jitter

-

0.17

UI p-p

JT

Total Jitter

-

0.35

UI p-p

SMO

Multiple Output Skew

-

1000

ps

Skew at the transmitter

output between lanes of a

multilane link

UI

Unit Interval

400

400

ps

+/- 100 ppm

Symbol

Parameter

Range

Unit

Notes

Min

Max

VO

Output Voltage

-0.40

2.30

Volts

Voltage relative to COM-

MON of either signal com-

prising a differential pair.

VDIFF PP

Differential Output Voltage

800

1600

mV p-p

JD

Deterministic Jitter

-

0.17

UI p-p

JT

Total Jitter

-

0.35

UI p-p

SMO

Multiple Output Skew

-

1000

ps

Skew at the transmitter

output between lanes of a

multilane link

UI

Unit Interval

320

320

ps

+/- 100 ppm