VSC8504-02 datasheet(109/131 Pages) MICROSEMI

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Electrical Specifications

VMDS-10507 VSC8504-02 Datasheet Revision 4.2

Figure 43 •

QSGMII Transient Parameters

5.2.7.1

Enhanced SerDes Outputs

The following table provides the AC specifications for the enhanced SerDes outputs in SGMII mode.

The following table provides the AC specifications for the enhanced SerDes outputs in QSGMII mode.

Table 113 •

Enhanced SerDes Outputs AC Specifications, SGMII Mode

Parameter

Symbol

Minimum

Maximum

Unit Condition

Unit interval, 1.25G mode

800 ps

VOD ringing compared to VS

VRING

±10

RL =100 Ω ±1%

VOD rise time and fall time

tR, tF

100

200

20% to 80% of VS

RL =100 Ω ±1%

Differential peak-to-peak output

voltage

VOD

Tx disabled

Differential output return loss,

50 MHz to 625 MHz

RLO_DIFF ≥10

RL =100 Ω ±1%

Differential output return loss,

625 MHz to 1250 MHz

RLO_DIFF 10–10 × log

(ƒ/625 MHz)

RL =100 Ω ±1%

Common-mode return loss,

50 MHz to 625 MHz

RLOCM

6dB

Intrapair skew

tSKEW

Table 114 •

Enhanced SerDes Outputs AC Specifications, QSGMII Mode

Parameter

Symbol

Minimum

Maximum

Unit Condition

Unit interval, 5G

200 ps

VOD rise time and fall time tR, tF

20% to 80% of VS

RL = 100 Ω ±1%

Differential peak-to-peak

output voltage

VOD

Tx disabled

Differential output return

loss, 100 MHz to 2.5 GHz

RLO_DIFF 8dB

RL = 100 Ω ±1%

Differential output return

loss, 2.5 GHz to 5 GHz

RLO_DIFF 8dB– 16.6log

(ƒ/2.5 GHz)

RL = 100 Ω ±1%

Eye mask X1

T_X1

0.15

Eye mask X2

T_X2

0.4

R_Y2

R_Y1

–R_Y1

–R_Y2

T_Y2

T_Y1

–T_Y1

–T_Y2

Time (UI)

1.0

T_X1

T_X2

1–T_X2

R_X1

0.5

1–R_X1

1.0

Time (UI)

Transmitter Eye Mask

Receiver Eye Mask

1–T_X1

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