GS3490

Final Data Sheet

Rev. 1

GENDOC-058568

April 2014

9 of 22

Proprietary & Confidential

www.semtech.com

Table 2-4: AC Electrical Characteristics - Cable Driver Mode

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Notes

Serial Data Rate

–

270

–

2970

Mb/s

–

Additive Jitter

–

2.97Gb/s

–

15

25

–

1.485Gb/s

–

15

25

–

270Mb/s

–

55

85

–

SDO Rise/Fall Time

CD_SD_EN = 0, 20% - 80%

–

–

135

ps

–

CD_SD_EN = 1, 20% - 80%

400

–

950

ps

–

Mismatch in Rise/Fall

Time

Δt

CD_SD_EN = 0 only

–

–

35

ps

–

Duty Cycle Distortion

–

CD_SD_EN = 0, 2.97Gb/s

–

–

14

ps

1, 2

CD_SD_EN= 0, 1.485Gb/s

–

–

20

ps

1, 2

CD_SD_EN = 1

–

–

50

ps

1, 2

Overshoot

–

CD_SD_EN = 0

–

–

10

%

1

Output Return Loss

ORL

5MHz - 1.485GHz

15

–

–

dB

3

1.485GHz - 2.97GHz

10

–

–

dB

3

SDO Output Voltage

Swing

ΔV

SDO

750

800

880

1

DDI/DDI Input Voltage

Swing

ΔV

DDI

Guaranteed functional

100

–

250

–

Guaranteed to meet all published

specifications

250

–

2200

–

Cable Driver Mode

Enable Delay

––

–

0.25

–

μs

–

Notes:

1. Single-ended into 75

Ω external load.

2. Calculated as the actual positive bit-width compared to the expected positive bit-width using a 1010 pattern.

3. ORL depends on board design. The GS3490 achieves this specification on Semtech's evaluation boards.