VSC8504-02 datasheet(108/131 Pages) MICROSEMI

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Electrical Specifications

VMDS-10507 VSC8504-02 Datasheet Revision 4.2

5.2.4

SerDes Driver Jitter

The following table lists the jitter characteristics for the SerDes output driver.

5.2.5

SerDes Inputs

The following table lists the AC specifications for the SerDes inputs.

5.2.6

SerDes Receiver Jitter Tolerance

The following table lists jitter tolerances for the SerDes receiver.

5.2.7

Enhanced SerDes Interface

All AC specifications for the enhanced SerDes interface are compliant with QSGMII Specification

Revision 1.3 and meet or exceed the requirements in the standard. They are also compliant with the OIF-

CEI-02.0 requirements where applicable.

The enhanced SerDes interface supports the following modes of operation: SGMII, QSGMII, and SFP.

The values in the tables in the following sections apply to the QSGMII modes listed in the condition

column and are based on the test circuit shown in Figure 38, page 91. The transmit and receive eye

specifications relate to the eye diagrams shown in the following illustration, with the compliance load as

defined in the test circuit.

Table 110 •

SerDes Driver Jitter Characteristics

Parameter

Symbol Maximum

Unit Condition

Total jitter

TJO

192

Measured according to IEEE 802.3.38.5

Deterministic jitter

DJO

Measured according to IEEE 802.3.38.5

Table 111 •

SerDes Input AC Specifications

Parameter

Maximum

Unit Condition

Differential input return loss,

50 MHz to 625 MHz

≥10

RL = 100

Ω ±1%

Differential input return loss,

625 MHz to 1250 MHz

10–10 × log (ƒ/625 MHz)

RL = 100

Ω ±1%

Table 112 •

SerDes Receiver Jitter Tolerance

Parameter

Symbol Minimum

Unit Condition

Total jitter tolerance, greater than

637 kHz, SFP mode

TJTI

600

Measured according to

IEEE 802.3 38.6.8

Deterministic jitter tolerance,

greater than 637 kHz, SFP mode

DJTI

370

Measured according to

IEEE 802.3 38.6.8

Cycle distortion jitter tolerance,

100BASE-FX mode

JTCD

1.4

Measured according to

ISO/IEC 9314-3:1990

Data-dependent jitter tolerance,

100BASE-FX mode

DDJ

2.2

Measured according to

ISO/IEC 9314-3:1990

Random peak-to-peak jitter

tolerance, 100BASE-FX mode

RJT

2.27

Measured according to

ISO/IEC 9314-3:1990

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