About Us
EnglishEnglish
You are here: Home » Products » Optical Products » Optical Transceiver » 25G SFP28 SR Dual LC Transceiver

loading

Share to:
sharethis sharing button

25G SFP28 SR Dual LC Transceiver

• Compliant to QSFP28 MSA
• SFF-8636 Specification
• Wide Operating Temperature(0°C~70°C)
• 4x25Gbps and 4x27.95Gbps 850nm VCSEL-based Transmitter
• RoHS compliant
• Telecom Central Offices (CO)
Availability:
Quantity:
  • 25G SFP28 SR Transceiver

  • zhaolong

Application

Data center & Networking Equipment

Servers/Storage Devices

High Performance Computing (HPC)

Switches/Routers

Telecom Central Offices (CO)

Test and Measurement Equipment


Standards Compliance

SFF8472

SFP28 MSA

SFF-8431 and SFF-8432


Features

25Gbps serial optical interface

850nm VCSEL laser and PIN receiver

Operating case temperature: (0°C~70°C)

Maximum link length of 70m via OM3 multimode Fiber (MMF)

Maximum link length of 100m via OM4 multimode Fiber (MMF)



Product Specification

Absolute Maximum Ratings (TC=25°C, unless otherwise noted)

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings will cause permanent damage and/or adversely affect device reliability.

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Storage Temperature

TS

-40

-

+85

ºC


Operating Relative Humidity

RH

0

-

+85

%

No

condensation


General Specifications (Ta, Unless Otherwise Noted)

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Operating Case Temperature

Tc

0

-

70

ºC


Power Supply Voltage

Vcc

3.15

3.3

3.45

V


Lane Baud Rate

BRLANE


25.78125


Gbps



Electrical Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Power Consumption




1

W


Supply Current

Icc



300

mA



Transmitter Characteristics (Ta, Unless Otherwise Noted)

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Center wavelength

λ

840


860

nm


RMS spectral width

Pm



0.6

nm


Average optical power

Pavg

-8.4


2.4

dBm


Optical modulation amplitude

OMA

-6.4


3

dBm


Average launch power of OFF

transmitter

Poff



-30

dBm


Extinction ratio

ER

2



dB


Optical return loss tolerance




12

dB



Receiver Characteristics (Ta, Unless Otherwise Noted)

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Center wavelength

λ

840

850

860

nm


Damage threshold


3.4



dBm


Receive power overload


2.4



dBm


Receiver reflectance




-12

dB


Receiver sensitivity

SENS



-10.3

dBm

Note1

LOS Assert

LOSA

-30



dBm


LOS De-Assert

LOSD



-13

dBm


LOS Hysteresis

LOSH

0.5



dB


Note 1: Measured with a 25.78125G, PRBS-31 NRZ, ER>2dB, BER<5E-5.


PIN Descriptions

Figure 1 – Pin Definitions


PIN

Logic

Symbol

Name / Description

Notes

1


VeeT

Module Transmitter Ground


2

LVTTL-O

TX_Fault

Module Transmitter Fault


 

3

 

LVTTLI

 

TX_Dis

Transmitter Disable, Turns off transmitter

laser output


4

LVTTL-I/O

SDA

2-Wire Serial Interface Data Line


5

LVTTL-I

SCL

2-Wire Serial Interface Clock


6


MOD_DEFO

Module Definition, Grounded in the module


7

LVTTL-I

RSO

Receiver Rate Select


 

8

 

LVTTL-O

 

RX Los

Receiver Loss of Signal Indication Active

LOW


9

LVTTL-I

RS1

Transmitter Rate Select (not used)


10


VeeR

Module Receiver Ground


11


VeeR

Module Receiver Ground


12

CML-O

RD-

Receiver Inverted Data Output


13

CML-O

RD+

Receiver Data Output


14


VeeR

Module Receiver Ground


PIN

Logic

Symbol

Name / Description

Notes

15


VccR

Module Receiver 3.3 V Supply


16


VccT

Module Receiver 3.3 V Supply


17


VeeT

Module Transmitter Ground


18

CML-I

TD+

Transmitter Non-Inverted Data Input


19

CML-I

TD-

Transmitter Inverted Data Input


20


VeeT

Module Transmitter Ground


Digital Diagnostic Specification

Parameter

Symbol

Accuracy

Units

Notes

Transceiver Case Temperature

DMI_TEMP

&plusmn;3

deg.C


Supply voltage monitor absolute error

DMI _VCC

&plusmn;3

%


Channel Bias current monitor

DMI_IBIAS

&plusmn;10

%


Channel RX power monitor absolute

error

DMI_RX

&plusmn;3

dB


Channel TX power monitor absolute

error

DMI_TX

&plusmn;3

dB



Recommended Interface Circuit

Figure 2 Typical application circuit



Mechanical Specifications

Unit: mm


Figure 3 - Mechanical Specifications


Product Information

Data Rate

Factor

Optical

Wavelength

Reach

25G

SFP28

SR

Dual LC

850nm

100m

ESD Safety Cautions

This transceiver is specified as ESD threshold 1KV for high speed data pins and 2KV for all others electrical input pins, tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment.


Important Notice

The performance figures, data, and any illustrative material presented in this datasheet are typical and must be explicitly confirmed in writing by ZHAOLONG before they are deemed applicable to any specific order or contract.


By ZHAOLONG's policy of continuous improvement, specifications may change without prior notice. The publication of information in this datasheet does not imply exemption from patent or other


protective rights held by ZHAOLONG or other parties. Additional details can be obtained from any ZHAOLONG sales representative.


Revision Record

Rev.

Comments

Author

Date

A01

Initial Release

James Chen

10/01/2023













Previous: 
Next: 

RELATED BLOGS

content is empty!

WHITE PAPER

2020-07-20 153

Getting to Know the Generic Cabling in Industrial Environments