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January 18, 2011

CPS-10Q

CPS-10Q Datasheet

2010 Integrated Device Technology, Inc. All rights reserved.

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 Trans-

mitter 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.

Figure 15 Transmitter Output Compliance Mask

Symbol

Parameter

Range

Unit

Notes

Min

Max

VO

Output Voltage

-0.40

2.30

Volts

Voltage relative to COMMON of either

signal comprising a differential pair.

VODIFF 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

Table 22 Long Run Transmitter AC Timing Specifications - 3.125 GBaud

Transmitter Setting

VDIFFmin (mV)

VDIFFmax (mV)

A (UI)

B (UI)

1.25 GBaud Short Range

250

500

0.175

0.39

1.25 GBaud Long Range

400

800

0.175

0.39

2.5 GBaud Short Range

250

500

0.175

0.39

2.5 GBaud Long Range

400

800

0.175

0.39

3.125 GBaud Short Range

250

500

0.175

0.39

3.125 Gbaud Long Range

400

800

0.175

0.39

Table 23 Transmitter Differential Output Eye Diagram Parameters

VDIFFmax

VDIFFmin

-VDIFFmax

-VDIFFmin

0

0A

B

1 - A

1 - B

1

Time in UI