VSC8504-02 datasheet(103/131 Pages) MICROSEMI

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Electrical Specifications

VMDS-10507 VSC8504-02 Datasheet Revision 4.2

Figure 41 •

SGMII DC Input Definitions

5.1.6

Enhanced SerDes Interface (QSGMII)

All DC 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 OIF-

CEI-02.0 requirements where applicable.

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

values in the following table apply to the modes specified in the condition column.

The following table shows the DC specifications for the enhanced SerDes driver.

Input differential peak-to-peak

voltage

|VID|

100

1000

Input common-mode voltage(1)

VICM

0VDD_A(2)

Without any

differential signal

Receiver differential input

impedance

120

Input differential hysteresis,

SGMII mode

VHYST

SGMII compliancy requires external AC-coupling. When interfacing with specific Microsemi devices, DC-

coupling is possible. For more information, contact your local Microsemi sales representative.

The common-mode voltage is only limited by the maximum and minimum input voltage range and the

input signal’s differential amplitude.

Table 103 •

Enhanced SerDes Driver DC Specifications

Parameter

Symbol Minimum

Maximum

Unit Condition

Output differential peak voltage,

SFP and QSGMII modes

|VODp|

250

400

VDD_VS =1.0 V

RL =100 Ω ±1%

maximum drive

Output differential peak voltage,

SGMII mode(1)

|VODp|

150

400

VDD_VS =1.0 V

RL =100 Ω ±1%

DC output impedance,

single-ended, SGMII mode

140

VC =1.0 V

See Figure 40,

page 91

RO mismatch between A and B,

SGMII mode(2)

ΔRO

VC =1.0 V

See Figure 40,

page 91

Change in |VOD| between 0 and 1,

SGMII mode

Δ|VOD|25

RL =100 Ω ±1%

Change in VOS between 0 and 1,

SGMII mode

ΔVOS

RL =100 Ω ±1%

Table 102 •

SerDes Receiver DC Specifications (continued)

Parameter

Symbol Minimum

Maximum

Unit Condition

VID = VIA –VIB

VIC = ½ (VIA + VIB)

VIB

VIA

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