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Fiber Cable Assemblies.

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Fiber Cable Assemblies.


SFP 10G SR is a very compact 10Gb/s optical transceiver module for serial optical communication applications at 10Gb/s. The SFP 10G SR converts a 10Gb/s serial electrical data stream to 10Gb/s optical output signal and a 10Gb/s optical input signal to 10Gb/s serial electrical data streams. The high speed 10Gb/s electrical interface is fully compliant with SFI specification. The high performance 850nm VCSEL transmitter and high sensitivity PIN receiver provide superior performance for Ethernet applications at up to 300m links.

SFP 10G SR Features:
1. Supports 9.95 to 11.3Gb/s bit rates
2. Hot-Pluggable
3. Duplex LC connector
4. 850nm VCSEL transmitter, PIN photo-detector
5. MMF links up to 300m
6. 2-wire interface for management specifications compliant with SFF 8472 digital diagnostic monitoring interface
7. Power Supply :+3.3V
8. Power consumption<1W
9. Temperature Range: 0~ 70°C
10. RoHS compliant

SFP 10G SR Applications:
10GBASE-SR/SW Ethernet
10G Fibre Channel

  • Absolute Maximum Ratings
Parameter Symbol Min. Typical Max. Unit
Storage Temperature TS -40 +85 °C
Case Operating Temperature TA 0 70 °C
Maximum Supply Voltage Vcc -0.5 4 V
Relative Humidity RH 0 85 %
  • Electrical Characteristics (TOP = 0 to 70 °C, VCC = 3.135 to 3.465 Volts)
Parameter Symbol Min. Typical Max. Unit Note
Supply Voltage Vcc 3.135 3.465 V
Supply Current Icc 250 mA
Power Consumption P 1 W
Transmitter Section:
Input differential impedance Rin 100 Ω 1
Tx Input Single Ended DC Voltage Tolerance (Ref VeeT) V -0.3 4 V
Differential input voltage swing Vin,pp 180 700 mV 2
Transmit Disable Voltage VD 2 Vcc V 3
Transmit Enable Voltage VEN Vee Vee+0.8 V
Receiver Section:
Single Ended Output Voltage Tolerance V -0.3 4 V
Rx Output Diff Voltage Vo 300 850 mV
Rx Output Rise and Fall Time Tr/Tf 30 ps 4
LOS Fault VLOS fault 2 VccHOST V 5
LOS Normal VLOS norm Vee Vee+0.8 V 5


  1. Connected directly to TX data input pins. AC coupling from pins into laser driver IC.
  2. Per SFF-8431 Rev 3.0
  3. Into 100 ohms differential termination.
  4. 20%~80%
  5. LOS is an open collector output. Should be pulled up with 4.7k – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.
  • Optical Parameters(TOP = 0 to 70°C, VCC = 3.135 to 3.465 Volts)
Parameter Symbol Min. Typical Max. Unit Note
Transmitter Section:
Center Wavelength λt 840 850 860 nm
RMS spectral width λRMS 4 nm
Average Optical Power Pavg -7.3 -1 dBm 1
Optical Power OMA Poma -1.5 dBm
Laser Off Power Poff -30 dBm
Extinction Ratio ER 3.5 dB
Transmitter Dispersion Penalty TDP 3.9 dB 2
Relative Intensity Noise Rin -128 dB/Hz 3
Optical Return Loss Tolerance 20 dB
Receiver Section:
Center Wavelength λr 840 860 nm
Receiver Sensitivity (OMA) Sen -11.1 dBm 4
Stressed Sensitivity (OMA) SenST -7.5 dBm 4
Los Assert LOSA -30 dBm
Los Dessert LOSD -12 dBm
Los Hysteresis LOSH 0.5 dB
Overload Sat 0 dBm 5
Receiver Reflectance Rrx -12 dB


  1. Average power figures are informative only, per IEEE802.3ae.
  2. TWDP figure requires the host board to be SFF-8431compliant. TWDP is calculated using the Matlab code provided in clause of IEEE802.3ae.
  3. 12dB reflection.
  4. Conditions of stressed receiver tests per IEEE802.3ae. CSRS testing requires the host board to be SFF-8431 compliant.
  5. Receiver overload specified in OMA and under the worst comprehensive stressed condition.
  • Timing Characteristics
Parameter Symbol Min. Typical Max. Unit
TX_Disable Assert Time t_off 10 us
TX_Disable Negate Time t_on 1 ms
Time to Initialize Include Reset of TX_FAULT t_int 300 ms
TX_FAULT from Fault to Assertion t_fault 100 us
TX_Disable Time to Start Reset t_reset 10 us
Receiver Loss of Signal Assert Time TA,RX_LOS 100 us
Receiver Loss of Signal Deassert Time Td,RX_LOS 100 us
Rate-Select Chage Time t_ratesel 10 us
Serial ID Clock Time t_serial-clock 100 kHz
  • Pin Assignment

Diagram of Host Board Connector Block Pin Numbers and Name

  • Pin Function Definitions
PIN # Name Function Notes
1 VeeT Module transmitter ground 1
2 Tx Fault Module transmitter fault 2
3 Tx Disable Transmitter Disable; Turns off transmitter laser output 3
4 SDL 2 wire serial interface data input/output (SDA)
5 SCL 2 wire serial interface clock input (SCL)
6 MOD-ABS Module Absent, connect to VeeR or VeeT in the module 2
7 RS0 Rate select0, optionally control SFP+ receiver. When high, input data rate >4.5Gb/ s; when low, input data rate <=4.5Gb/s
8 LOS Receiver Loss of Signal Indication 4
9 RS1 Rate select0, optionally control SFP+ transmitter. When high, input data rate >4.5Gb/s; when low, input data rate <=4.5Gb/s
10 VeeR Module receiver ground 1
11 VeeR Module receiver ground 1
12 RD- Receiver inverted data out put
13 RD+ Receiver non-inverted data out put
14 VeeR Module receiver ground 1
15 VccR Module receiver 3.3V supply
16 VccT Module transmitter 3.3V supply
17 VeeT Module transmitter ground 1
18 TD+ Transmitter inverted data out put
19 TD- Transmitter non-inverted data out put
20 VeeT Module transmitter ground 1


  1. The module ground pins shall be isolated from the module case.
  2. This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.
  3. This pin shall be pulled up with 4.7K-10Kohms to VccT in the module.
  4. This pin is an open collector/drain output pin and shall be pulled up with 4.7K-10Kohms to Host_Vcc on the host board.
  • SFP Module EEPROM Information and Management

The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the I2C interface at address A0h and A2h. The memory is mapped in Table 1. Detailed ID information (A0h) is listed in Table 2. And the DDM specification at address A2h. For more details of the memory map and byte definitions, please refer to the SFF-8472, “Digital Diagnostic Monitoring Interface for Optical Transceivers”. The DDM parameters have been internally calibrated.

Table 1. Digital Diagnostic Memory Map (Specific Data Field Descriptions)

Table 2 – EEPROM Serial ID Memory Contents (A0h)

Data Address



Name of


Description and Contents
Base ID Fields
0 1 Identifier Type of Serial transceiver (03h=SFP)
1 1 Reserved Extended identifier of type serial transceiver (04h)
2 1 Connector Code of optical connector type (07=LC)
3-10 8 Transceiver 10G Base-SR
11 1 Encoding 64B/66B
12 1 BR, Nominal Nominal baud rate, unit of 100Mbps
13-14 2 Reserved (0000h)
15 1 Length(9um) Link length supported for 9/125um fiber, units of 100m
16 1 Length(50um) Link length supported for 50/125um fiber, units of 10m
17 1 Length(62.5um) Link length supported for 62.5/125um fiber, units of 10m
18 1 Length(Copper) Link length supported for copper, units of meters
19 1 Reserved
20-35 16 Vendor Name SFP vendor name: Huihongfiber
36 1 Reserved
37-39 3 Vendor OUI SFP transceiver vendor OUI ID
40-55 16 Vendor PN Part Number: “SFP+-10GB-SR” (ASCII)
56-59 4 Vendor rev Revision level for part number
60-62 3 Reserved
63 1 CCID Least significant byte of sum of data in address 0-62
Extended ID Fields
64-65 2 Option

Indicates which optical SFP signals are implemented

(001Ah = LOS, TX_FAULT, TX_DISABLE all supported)

66 1 BR, max Upper bit rate margin, units of %
67 1 BR, min Lower bit rate margin, units of %
68-83 16 Vendor SN Serial number (ASCII)
84-91 8 Date code Huihongfiber’s Manufacturing date code
92-94 3 Reserved
95 1 CCEX Check code for the extended ID Fields (addresses 64 to 94)
Vendor Specific ID Fields
96-127 32 Readable Huihongfiber specific date, read only
128-255 128 Reserved Reserved for SFF-8079
  • Digital Diagnostic Monitor Characteristics
Data Address Parameter Accuracy Unit
96-97 Transceiver Internal Temperature ±3.0 °C
98-99 VCC3 Internal Supply Voltage ±3.0 %
100-101 Laser Bias Current ±10 %
102-103 Tx Output Power ±3.0 dB
104-105 Rx Input Power ±3.0 dB
  • Regulatory Compliance

The SFP+-10GB-SR complies with international Electromagnetic Compatibility (EMC) and international safety requirements and standards (see details in Table following).

Electrostatic Discharge

(ESD) to the Electrical Pins


Method 3015.7

Class 1(>1000 V)

Electrostatic Discharge (ESD)

to the Duplex LC Receptacle

IEC 61000-4-2


Compatible with standards


Interference (EMI)

FCC Part 15 Class B

EN55022 Class B (CISPR 22B)

VCCI Class B

Compatible with standards
Laser Eye Safety

FDA 21CFR 1040.10 and 1040.11

EN60950, EN (IEC) 60825-1,2

Compatible with Class 1 laser