VSC7440 datasheet(404/444 Pages) MICROSEMI

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Electrical Specifications

VMDS-10492 VSC7440 Datasheet Revision 4.2

387

The specifications in the following table correspond to 10G transmitter output, SFI point A.

The specifications in the following table correspond to SFI point D, ASIC. Point D assumes that the input

is from a compliant point C output and a compliant SFI channel according to the SFP+ standard

(SFF-8431).

The 10 Gbps transmitter operating in 10GBASE-KR mode complies with IEEE 802.3 clause 72.7.

Table 303 •

10G Transmitter Output (SFI Point A, ASIC)

Parameter

Symbol Minimum

Maximum

Unit

Condition

Data rate

10.3125 – 100 ppm 10.3125 + 100 ppm Gbps

10 Gbps LAN

10 Gbps SFP+ Cu

Data rate

1.25 – 100 ppm

1.25 + 100 ppm

Gbps

1.25 Gbps mode

Termination mismatch at

1MHz

ΔZM

Rise time and fall time

tR, tF

20% to 80%.

AC common-mode voltage

VCM

mVRMS

Table 304 •

SFI Input Receiver (SFI Point D, ASIC)

Parameter

Symbol

Minimum

Typical

Maximum

Unit

Condition

RXIN input data rate,

10 Gbps LAN

10.3125 –

100 ppm

10.3125

10.3125 + 10

0ppm

Gbps

10 Gbps LAN mode

10 Gbps SFP+ Cu

RXIN input data rate,

1.25 Gbps

1.25 –

100 ppm

1.25

1.25 +

100 ppm

Gbps

1.25 Gbps mode

RXIN linear mode

differential input data

swing

ΔVRXINLINEAR 180

600

Voltage modulation

amplitude (VMA)

RXIN limiting mode

differential input data

swing

ΔVRXINLIMITING 300

850

Measured peak-to-peak

RXIN AC common-mode

voltage

VCM

mVRMS

Table 305 •

10GBASE-KR Transmitter

Parameter

Symbol

Minimum

Maximum

Unit

Condition

Data rate

10.3125 – 100 ppm

10.3125 + 100 ppm

Gbps

Differential output return

loss

RLOSDD22

–9

50 MHz to 2.5 MHz

Differential output return

loss

RLOSDD22

–9 + 12 x log10

(ƒ/2.5 GHz)

2.5 GHz to 7.5 GHz

Common-mode output

return loss

RLOSCC22

–6

50 MHz to 2.5 MHz

Common-mode output

return loss

RLOSCC22

–6 + 12 x log10

(ƒ/2.5 GHz)

2.5 GHz to 7.5 GHz

Rise time and fall time

tR, tF

571

20% to 80%

Random jitter

0.171, 2

UIP-P

Deterministic jitter

0.151

UIP-P

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