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March 31, 2008

IDT80KSW0004

Datasheet

Receiver Eye Diagrams

For each baud rate at which an LP-Serial receiver is specified to operate, the receiver meets the corresponding Bit Error Rate specification (Receiver

AC Timing Specifications - 1.25 GBaud, Receiver AC Timing Specifications - 2.5 GBaud, and Receiver AC Timing Specifications - 3.125 GBaud )

when the eye pattern of the receiver test signal (exclusive of sinusoidal jitter) falls entirely within the unshaded portion of the Receiver Input

Compliance Mask shown in (Figure 17) with the parameters specified in Receiver Input Compliance Mask Parameters exclusive of Sinusoidal Jitter.

The eye pattern of the receiver test signal is measured at the input pins of the receiving device with the device replaced with a 100 Ohm +/- 5%

differential resistive load.

Figure 17 Receiver Input Compliance Mask

Table 24 Receiver Input Compliance Mask Parameters exclusive of Sinusoidal Jitter

Receiver Rate

VDIFFmin (mV)

VDIFFmax (mV)

A (UI)

B (UI)

1.25 GBaud

100

800

0.275

0.400

2.5 GBaud

100

800

0.275

0.400

3.125 GBaud

100

800

0.275

0.400

VDIFFmax

VDIFFmin

-VDIFFmax

-VDIFFmin

0

0

AB

1 - A

1 - B

1

Time in UI