VSC7440 datasheet(400/444 Pages) MICROSEMI

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Electrical Specifications

VMDS-10492 VSC7440 Datasheet Revision 4.2

383

6.2.5

SERDES10G

This section describes the AC specifications for the SERDES10G transceiver. The transceiver supports

the following modes:

•

100BASE-FX

•SGMII

•SFP

•

1000BASE-KX

•2.5G

•

10GBASE-KR

•SFP+ (SFI)

The following table lists the AC characteristics for the 10G transmitter in 100BASE-FX, SGMII, SFP,

2.5G, and 1000BASE-KX modes. Applies to the S[10:7]_TXN/P pins. Note that only S[10:9]_TXN/P pins

support 10GBASE-KR and SFP+ (SFI).

The following table lists the AC characteristics for the 10G receiver operating in 100BASE-FX, SGMII,

SFP, 2.5G, and 1000BASE-KX modes. Applies to the S[10:7]_RXN/P pins. Note that only S[10:9]_RXN/P

pins support 10GBASE-KR and SFP+ (SFI).

Table 297 •

100BASE-FX, SGMII, SFP, 2.5G, 1000BASE-KX Transmitter

Parameter

Symbol

Minimum

Maximum

Unit

Condition

Data rate

125 – 100 ppm

125 + 100 ppm

Mbps

100BASE-FX.

Data rate

1.25 – 100 ppm

1.25 + 100 ppm

Gbps

SGMII, SFP, 1000BASE-

KX.

Data rate

3.125 – 100 ppm 3.125 + 100 ppm Gbps

2.5G.

Differential output return loss

RLOSDD22

–10

50 MHz to 625 MHz.

Differential output return loss

RLOSDD22

–10 + 10 x log

(ƒ/625 MHz)

625 MHz to 1250 MHz.

Rise time and fall time1

Slew rate is programmable.

tR, tF

320

20% to 80%.

Interpair skew

tSKEW

Random jitter

0.15

UIP-P

At BER 10–12.

Deterministic jitter

0.10

UIP-P

Total jitter

0.25

UIP-P

Wideband SyncE jitter

TWJ

0.5

UIP-P

Measured according to

ITU-T G.8262, section 8.3.

Eye mask

0.125

Eye mask

0.325

Eye mask

3802

Compatibility to supported standards require VDD_HS = 1.2 V supply for driver.

Eye mask

800

Table 298 •

100BASE-FX, SGMII, SFP, 2.5G, 1000BASE-KX Receiver

Parameter

Symbol Minimum

Typical

Maximum

Unit

Condition

Data rate

125 – 100 ppm

125 + 100 ppm

Mbps

100BASE-FX.

Data rate

1.25 – 100 ppm

1.25 + 100 ppm

Gbps

SGMII, SFP, 1000BASE-KX.

Data rate

3.125 – 100 ppm

3.125 + 100 ppm

Gbps

2.5G

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