Specification

SFP28 Transceiver 850nm 100m over MM DDM

Features

  • Supports 25Gbps data rate
  • 850nm VCSEL laser and PIN photo-detector
  • Duplex LC receptacle optical interface compliant
  • Single +3.3V power supply
  • Power dissipation < 1W
  • Hot-pluggable SFP28 form factor
  • Internal CDR on both Transmitter and Receiver channel
  • Maximum link length of 70m on OM3 MMF and 100m on OM4 MMF
  • Operating temperature range:
  • Commercial: 0℃~+70℃
  • RoHS Compliant
  • Digital diagnostics functions are available via the I2C interface

Application

  • 25GBASE-SR Ethernet
  • 32G Fiber Channel

Standard

  • Compliant with MSA SFP+ specification(SFF-8431)
  • Compliant with SFF-8472
  • CPRI Line Rate Option: 24.33Gb/s
  • Compliant to IEEE 802.3ae

Specification

Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Unit

Storage temperature

TS

-40

85

Power Supply Voltage

Vcc

0

3.6

V

Relative Humidity

RH

5

95

%

Recommended Operating Conditions

Parameter

Symbol

Min

Typical

Max

Unit

Operating Case Temperature

(Commercial)

Tc

0

 

70

Power Supply Voltage

Vcc

3.13

3.3

3.47

V

Supply Current

Icc

   

300

mA

Data Rate

 

-

25.78

28.05

Gbps

Fiber Length on 50/125μm

high-bandwidth (OM3) MMF

     

70

m

Fiber Length on 50/125μm high-bandwidth (OM4) MMF

     

100

m

Optical transmitter Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Launched Power (avg.)

Pout

-9.1

 

2.4

dBm

 

Optical Power OMA

POMA

-6.4

 

3

dBm

 

Operating Wavelength Range

λc

840

850

860

nm

 

Spectral Width (-20dB)

σ

   

0.6

nm

 

Extinction Ratio

ER

2

   

dB

 

Differential data input swing

VIN,PP

40

 

1000

mV

 

Input Differential Impedance

ZIN

90

100

110

Ω

 

TX

Disable

 

2.0

 

Vcc

V

 

Enable

 

0

 

0.8

V

 

TX

Fault

 

2.0

 

Vcc

V

 

Normal

 

0

 

0.8

V

 

Output Eye Diagram

Complies with IEEE802.3z eye masks when filtered

Optical receiver Characteristics

Parameter

Symbol

Min

Typical

Max

Unit

Notes

Receiver Sensitivity

S

   

-11

dBm

 

Stressed Sensitivity (OMA)

 

-

-

-5.2

dBm

 

Wavelength Range

λc

840

850

860

nm

 

Receiver Power (OMA)

P

   

3

dBm

 

LOS

Optical De-assert

Pd

   

-13

dBm

 

Optical Assert

Pa

-30

   

LOS

High

2.0

 

Vcc

V

 

Low

   

0.8

V

 

LOS hysteresis

 

0.5

   

dB

 

Differential data output swing

Vout,PP

500

 

1130

mV

 

Timing and Electrical

Parameter

Symbol

Min

Max

Unit

Conditions

Tx-Disable assert time

T_off

 

100

us

Rising edge of Tx_Disable to fall of output signal below 10% of nominal

Tx-Disable negate time

T_on

 

2

ms

Falling edge of Tx_Disable to rise of output signal above 90% of nominal,this is only applies in normal operation,ont during start up or fault recorvery.

Time to initialize 2-wire interface

t_2w_start_up

 

300

ms

From power on or hot plug after the supply meeting

Time to initialize

T_start_up

 

300

ms

From power supplies meeting hot plug or Tx disable negated during power up ,or Tx_Fault recovery,unitl non-cooled power level I part is full operational

Time to initialize cooled module and time to power up a cooled module to power level II

T_start_up_cooled

 

90

S

From power supplies meeting hot plug or Tx disable negated during power up ,or Tx_Fault recovery,unitl non-cooled power level I part is full operational.Also,from stoop bit low-to-high SDA transition enabling Power Level II until cooled module is fully operational.

Time to Power up to level II

T_power_level2

 

300

ms

From stop bit low-to-hight SDA transition enabling power Level II until non-cooled module is fully opertational.

Time to Power Down from level II

T_power_down

 

300

ms

From stop bit low-to-high SDA transition disabling power level II until module is within power level I requirements.

Tx_Fault assert

Tx_Fault_on

 

1

ms

From occurrence of fault to assertion of Tx_Fault.

Tx_Fault assert for cooled module

Tx_Fault_on_cooled

 

50

ms

From occurrence of fault to assertion of Tx_Fault.

Tx_Fault Reset

T_reset

10

 

us

Time Tx_Disable must be held high to reset Tx_Fault.

RSO,RSI rate select timing for FC

T_RSO_FC,T_RSI_FC

 

500

us

From assertion till stable output

RSO,RSI rate select timing non FC

T_RSO,T_RSI

 

24

ms

From assertion till stable output

Rx_LOS assert delay

T_los_on

 

100

us

From occurrence of loss of signal to assertion of Rx_LOS

Rx_LOS assert delay

T_los_off

 

100

us

From occurrence of loss of signal to negation of Rx_LOS

Digital Diagnostic Monitoring Information

Parameter

Accuracy

Calibration

Range

Temperature

±3°C

internal/ External

0~70°C

Voltage

±3%

internal/ External

3.0 to 3.6 V

Bias Current

±10%

internal/ External

0 to 20 mA

TX Power

±3dB

internal/ External

-9.1 to 2.4 dBm

RX Power

±3dB

internal/ External

-11 to 0 dBm

Digital Diagnostic Memory Map

The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA).

The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.

The digital diagnostic memory map specific data field defines as following.

Pin Descriptions

Pin

Name

Function/Description

Logic

Note

1

VeeT

Transmitter Ground

 

1

2

TX_Fault

Transmitter Fault

LVTTL-O

2

3

TX_Disable

Transmitter Disable. High: Transmitter off; Low: Transmitter on

LVTTL-I

 

4

SDA

2-Wire Serial Interface Data Line

LVTTL-O/I

2

5

SCL

2-Wire Serial Interface Clock

LVTTL-I

2

6

Mod_ABS

Module Absent, Connect to VeeT or VeeR in Module

   

7

RS0

Rate Select 0, optionally controls SFP module receiver

LVTTL-I

 

8

RX_LOS

Receiver Loss of Signal indication. High: loss of signal; Low: signal detected

LVTTL-O

 

9

RS1

Rate Select 1, optionally controls SFP module transmitter

LVTTL-I

 

10

VeeR

Receiver Ground

 

1

11

VeeR

Receiver Ground

 

1

12

RD-

Receiver Inverted Data Output

CML-O

 

13

RD+

Receiver Data Output

CML-O

 

14

VeeR

Module Receiver Ground

 

1

15

VccR

Receiver Power 3.3V Supply

   

16

VccT

Transmitter Power 3.3V Supply

   

17

VeeT

Module Transmitter Ground

 

1

18

TD+

Transmitter Non-Inverted Data Input

CML-I

 

19

TD-

Transmitter Inverted Data Input

CML-I

 

20

VeeT

Module Transmitter Ground

 

1

Notes:

  1. Module ground pins GND are isolated from the module case.

Shall be pulled up with 4.7K-10Kohms to a voltage between 3.15V and 3.45V on the host board.

Package Outline

Dimensions are in millimeters. All dimensions are ±0.2mm unless otherwise specified. (Unit: mm)

图片1

Regulatory Compliance

Feature

Test

Method

Electrostatic Discharge

(ESD) to the Electrical Pins

MIL-STD-883E

Method 3015.7

Class 1 (>1.5kV) – Human Body Model

Electrostatic Discharge

(ESD) Immunity

IEC61000-4-2

Class 2(>4.0kV)

Electromagnetic

Interference (EMI)

CISPR22 ITE Class B

FCC Class B

CENELEC EN55022

VCCI Class 1

Comply with standard

Immunity

IEC61000-4-3

Comply with standard

Eye Safety

FDA 21CFR 1040.10 and

1040.11

EN (IEC) 60825-1,2

Compatible with Class I laser

Product