SFP28-SR

Transmitter

Parameter

Symbol

Min.

Typical

Max.

Unit

Notes

CenterWavelength

λ_t

840

850

860

nm

Average Optical Power, 25GE

P_avg

-6

-

2.4

dBm

Optical Modulation Amplitude, 25GE

OMA

-3.2

-

-

dBm

OMA–TDP, 25GE

OMA_TDP

-4

-

-

dBm

Average Output Power (Laser Turn off)

P_OFF

-

-

-30

dBm

Spectral Width (RMS)

σ

-

0.6

nm

Extinction Ratio, 25GE

ER

2

-

-

dB

Transmitter and Dispersion Penalty

TDP

-

-

3.13

dB

1

Optical Return Loss Tolerance

ORLT

-

-

11

dB

Receiver

Center Wavelength

λr

840

850

860

nm

Stressed OMA Sensitivity, 25GE

-

-

-5.2

dBm

OMA Sensitivity, 25GE@1E-6

P_{SEN_OMA}

-

-

-10.2

dBm

Average Rx Sensitivity, 25GE@1E-6

P_SEN

-

-

-10.3

dBm

Receiver Overload

P_IN-OL

2.5

-

-

dBm

Reflectance

Ref

-

-

-12

dB

LOS Assert

LOS_A

-30

-

-17

dBm

LOS De-assert

LOS_D

-

-

-17

dBm

LOS Hysteresis

LOS_H

0.5

-

-

dB

Transmitter (Module Input)

Parameter

Symbol

Min.

Typical

Max.

Unit

Notes

Differential Data Input Amplitude

V_IN,P-P

100

-

900

mVpp

Differential Input Impedance

Rin

-

100

-

Ω

Tx_Fault

Normal Operation

V_IL

-0.3

-

0.4

V

TxFault

V_IH

2.4

-

V_CC+0.3

V

Tx_Disable

Normal Operation

V_IL

-0.3

-

0.8

V

Laser Disable

V_IH

2.0

-

V_CC+0.3

V

Receiver (Module Output)

Differential Data Output Amplitude

V_OUT,P-P

450

-

900

mVpp

Differential Output Impedance

Rout

-

100

-

Ω

Differential Termination Mismatch

-

-

±5

%

Output Rise/Fall Time, 20%~80%

T_R

9.5

-

-

ps

Rx_LOS

Normal Operation

V_OL

-0.3

-

0.4

V

Lose Signal

V_OH

2.4

-

V_CC+0.3

V