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25G-SR-SFP28-多模模块

工作温度范围 商业级:0℃ to 70℃ 工业级:-40℃ to 85℃

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产品介绍

产品特性

◆ 双纤LC接口 

◆ 热插拔SFP28封装

◆ 内置数字诊断功能

◆ 内置CDR芯片

◆ 在多模光纤中传输距离达到100米 

◆ +3.3V单电源供电

◆ 符合RoHS6标准

◆ 工作温度范围 商业级:0℃ to 70℃ 工业级:-40℃ to 85℃ 

◆ 低功耗<1.0W


产品应用

◆ 数据中心 

◆ 25G以太网 

◆ 32G光纤通道

◆ 服务器、交换机、存储主机光纤网卡


光学参数/Optical transmitter Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Launched Power (avg.)

POUT

-8.4


2.4

dBm


Optical Power OMA

POMA

-6.4


3

dBm


Operating Wavelength

Range

λC

840

850

860

nm


Spectral Width (RMS)

∆λ



0.6

nm


Extinction Ratio

ER

2



dB


Transmitter and Dispersion

Penalty

TDP



4.3

dB


Optical Output Power after

TX Disable

PDIS



-30

dBm


Relative Intensity Noise

RIN



-128

dB/Hz


Optical Return Loss

Tolerance

ORL



12

dB


Optical Receiver Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Wavelength Range

λC

840

850

860

nm


Average Receiver Power

Pmax

-10.3


2.4

dBm


Receiver Sensitivity

(Average power)

Psen



 

-10.3

dBm

1,2

LOS De-Assert

LOSD



-13

dBm


LOS Assert

LOSA

-30



dBm


LOS Hysteresis


0.5



dB


Receiver Reflectance

Rr



-12

dB


Notes:

1.Measured with a PRBS 231-1 test pattern, @25.78125Gb/s, BER<5E-5.

2.Minimum value is informative, equals min Tx OMA with infinite ER and max channel insertion loss.


引脚定义

The SFP28 modules are hot-pluggable. Hot pluggable refers to plugging in or unplugging a module while the host board is powered. The SFP28 host connector is a 0.8 mm pitch 20 position right angle improved connector specified by SFF-8431, or stacked connector with equivalent electrical performance. SFP28 module contacts mates with the host in the order of ground, power, followed by signal as illustrated by Figure 1 and the contact sequence order listed in Table 1.


image.png

Figure 1 SFP28 Pad Assignment Top View



Pin

No

Symbol

Name/Description

Power Seq.

Note

1

VeeT

Transmitter Ground

1st

1

2

TX_Fault

Transmitter Fault

3rd

2

3

TX_Disable

Transmitter Disable

3rd

3

4

SDA

2-Wire Serial Interface Data Line

3rd

4

5

SCL

2-Wire Serial Interface Data Line

3rd

4

6

Mod_ABS

Module Absent, Connect to VeeT or VeeR in Module

3rd

5

7

RS0

No connection required

3rd

6

8

RX_LOS

Receiver Loss of Signal indication

3rd

7

9

RS1

No connection required

3rd

8

10

VeeR

Receiver Ground

1st

1

11

VeeR

Receiver Ground

1st

1

12

RD-

Receiver Inverted DATA out. AC Coupled. CML-O

3rd

9

13

RD+

Receiver Non-inverted DATA out. AC Coupled. CML-O

3rd

9

14

VeeR

Receiver Ground

1st

1

15

VccR

Receiver Power Supply

2nd

10

16

VccT

Transmitter Power Supply

2nd

10

17

VeeT

Transmitter Ground

1st

1

18

TD+

Transmitter Non-Inverted DATA in. AC Coupled. CML-I

3rd

11

19

TD-

Transmitter Inverted DATA in. AC Coupled. CML-I

3rd

11

20

VeeT

Transmitter Ground

1st

1


Power Seq.: Pin engagement sequence during hot plugging.

Notes:

1.The module signal ground contacts.

2.This pin is an open drain/collector and should be pulled up to Vcc-host in the host with a 4.7k~10k Ohm resistor.

3.This pin should be pulled up to VccT with a 4.7k~10k Ohm resistor in modules.

4.SDA&SCL (IIC) are needed pull up 4.7k~10k Ohm resistors on host board.

5.Mod_ABS is connected to VeeT or VeeR in the SFP28 module.

6.Rate Select 0, no connection required.

7.Module RX_Los of signal indication need pull up 4.7k~10k Ohm resistor on host board.

8.Rate Select 1, no connection required.

9.RD -/+: These are the differential receiver outputs. They are CML AC-coupled with 100 Ohm terminal resistor matching internal.

10.VccR and VccT are the receiver and transmitter power supplies.

11.TD-/+: These are the differential transmitter inputs. They are CML AC-coupled with 100 Ohm terminal resistor matching internal


订购信息

型号/PART NO.

产品描述Specifications

Pack

Rate

Tx

Po

Sen

Temp

Reach

DDM

(Gbps)

(nm)

(dBm)

(dBm)

()

(m)

 

HD-SFP28/25G-SR

 

SFP28

 

25.78125

 

850

 

-8.4~2.4

 

<-10.3

 

0~70

 

100

 

Y


*Note:

1.Measured with a PRBS 231-1 test pattern, @25.78125Gb/s, BER<5E-5.

2.OM3 Cable length =<70m or OM4 Cable length =<100m.

3.More detail product selection and cable lengths, please contact Handar.


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