1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
  1. 1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
  2. 1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
  3. 1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
  4. 1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC
  5. 1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC

1.25G SFP BIDI Transceiver for 550m/3/10/20/40/60km SMF/MMF Links, 1310nm/1490nm Simplex LC/SC

SFPBD-1.25-1315-1/3/10/20/40/60/80-LC/SC

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  • Broad Multi-Brand Compatibility
  • Flexible Customization Support
  • Tested for Reliable Performance
  • Fast Response & Delivery
  • Professional Technical Support

The FC-LINK SFP BIDI 1.25G 1310/1550nm LC/SC SX Transceiver series, a compact small form-factor pluggable module designed for single-fiber bi-directional communication in Gigabit Ethernet 1000BASE-BX and Fiber Channel applications, utilizes a 1310nm/1550nm transmitter paired with a 1550nm/1310nm receiver to support transmission distances of 1km, 3km, 10km, 20km, 40km, 60km, and 80km. Featuring a 20-pin SFP connector with hot-plug capability for simplified installation and maintenance, its transmitter section incorporates a Class 1 laser fully compliant with IEC 60825 international safety standards, while the receiver section employs an advanced optical detection system—including an integrated B-type/A-type detector preamplifier (IDP) mounted in an optical header and a precision limiting post-amplifier IC—to ensure reliable signal reception and processing, with design adherence to SFF-8472 Multi-Source Agreement (MSA) guaranteeing industry-standard compatibility and interoperability for seamless network integration.

SPECIFICATIONS
Product ModelSFPBD-1.25-1315-1/3/10/20/40/60/80-LC/SCManufacturer BrandFC-LINK
Package TypeSFPOptical ConnectorSimplex SC/LC
Max Data Rateup to 1.25GChannel Data Rate-
Effective Transmission Distance1/3/10/20/40/60/80KM
Wavelength1310nm/1550nm
1550nm/1310nm		Operating Voltage3.3V
Fiber Type1KM MMF
3/10/20/40/60/80KM SMF		Core Size1KM 50/125µm
3/10/20/40/60/80KM 9/125µm
Transmitter TypeFP/DFBReceiver TypeIDP
TX Power1KM -9.5~-3dbm
3KM -14~-8dbm
10KM -9~-3dbm
20KM -8~-3dbm
40KM -3~2dbm
60KM 0~5dbm
80KM 0~5dbm		Receiver Sensitivity1/10KM -21dbm
3/20KM -22dbm
40KM -23dbm
60KM -24dbm
80KM -33dbm
Digital Diagnostic Monitoring(DDM)YESReceiver Overload1/3/10/20/40/60KM -3dbm
80KM -12dbm
Power Consumption<1WProtocolsSFP MSA SFF-8472
Operating temperature(Commercial)0℃~+70℃Storage Temperature(Commercial)-40℃~+85℃
Operating temperature(Industrial)-40℃~+85℃Storage Temperature(Industrial)-40℃~+85℃
Server-to-Switch Data Center Links

Used for 10G/25G/100G optical uplinks between servers and top-of-rack switches in high-density data center deployments.

Building-to-Building Campus Backbone

Suitable for 1G/10G fiber links between office buildings, campus distribution rooms, and backbone aggregation points.

Access-to-Core Enterprise Uplinks

Designed for switch uplinks from access to aggregation or core layers in enterprise and campus network architectures.

Industrial Switching in Harsh Environments

Applied in industrial Ethernet, automation systems, and outdoor cabinets where wider temperature tolerance and stable fiber communication are required.

网络拓扑展示模块
网络拓扑背景
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1
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Compatible Brands

Customization Options

Vendor Coding
Private Label
Custom Part Number
Packaging Design
Temperature Grade Selection
Absolute Maximum Ratings
Parameter Symbol Min. Max. Unit
Storage temperature TS -4.0  +85  ℃
Supply voltage VCC -0.5  3.6  V
Operating relative humidity - - 95  %
Exceeding any one of these values may destroy the device immediately

Recommended Operating Environment
Parameter Symbol Min Typical Max Unit
Operating case temperature Tc SFPBD-1.25-1315-1/3/10/20/40/60/80-LC/SC 0 - +70  °C
-40 - +85 
Power supply voltage Vcc 3.15 3.3 3.45 V
Power supply current Icc - - 300 mA
Date rate FE - - 100 - Mbps
FC - 1.063 - Gbps
GBE - 1.25 - Gbps

Performance Specifications – Electrical
Parameter Symbol Min. Typ. Max. Unit Notes
Transmitter
LVPECL inputs(Differential) Vin 400 - 2000 mVpp AC coupled inputs
Input impedance (Differential) Zin 85 100 115 ohm Rin > 100  kohm @ DC
TX_dis Disable - 2 - Vcc+0.3 V -
Enable - 0 - 0.8 -
TX_FAULT Fault - 2 - Vcc+0.3 V -
Normal - 0 - 0.5 -
Receiver
LVPECL outputs (Differential) Vout 370 - 2000 mVpp AC coupled output
Output impedance (Differential) Zout 85 100 115 ohms -
RX_LOS LOS - 2 - Vcc+0.3 V -
Normal - 0 - 0.8 V -
MOD_DEF ( 0:2 ) VoH 2.5 - - V With serial ID
VoL 0 - 0.5 V

Optical and Electrical Characteristics
Parameter Symbol Unit 1310nm FP and PIN, 550m 1310nm FP and PIN, 3km 1310nm FP and PIN, 10km 1310nm FP and PIN, 20km
Min. Typical Max. Min. Typical Max. Min. Typical Max. Min. Typical Max.
50µm core diameter MMF(800Mhz*km) L m - - 1000 - - - - - - - - -
62.5 core diameter MMF(500Mhz*km) L m - - 550 - - - - - - - - -
9µm core diameter SMF L km - - - - 3 - - 10 - - 20 -
Data rate - Gbps 100 1.063/1.25 - 100 1.063/1.25 - 100 1.063/1.25 - 100 1.063/1.25 -
Transmitter
Center wavelength λC nm 1260 1310 1360 1260 1310 1360 1270 1310 1350 1290 1310 1330
Spectral width(-20dB) Δλ nm - - 4 - - 4 - - 3.5 - - 3.5
Average output power Pout dBm -9.5 - -3 -14 - -8 -9 - -3 -8 - -3
Extinction ratio ER dB 6 - - 6 - - 6 9 - 6 9 -
Rise/Fall time(20%～80%) tr/tf ns - - 0.26 - - 0.26 - - 0.26 - - 0.26
Total jitter TJ ps - - 56.5 - - 260 - - 260 - - 260
Output optical eye - - Compatible with IEEE 802.3ah-2004 Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004
TX disable assert time t_off us - - 10 - - 10 - - 10 - - 10
Pout@TX disable asserted Pout dBm - - -45 - - -45 - - -45 - - -45
Receiver
Center wavelength λC nm 1500 1550 1580 1500 1550 1580 1530 1550 1570 1500 1550 1600
Receiver sensitivity Pmin dBm - - -22 - - -22 - - -21 - - -22
Receiver overload Pmax dBm -3 - - -3 - - -3 - - -3 - -
Return loss - - - - - - - - - - - - - -
Optical path penalty - - - - - - - - - - - - - -
LOS de-assert LOSD dBm - - -23 - - -23 - - -22 - - -23
LOS assert LOSA dBm -35 - - -35 - - -35 - - -35 - -
LOS hysteresis - dB 0.5 - - 0.5 - - 0.5 - - 0.5 - -

Optical and Electrical Characteristics
Parameter Symbol Unit 1310nm DFB and PIN, 40km 1310nm DFB and PIN, 60km 1310nm DFB and PIN, 80km
Min. Typical Max. Min. Typical Max. Min. Typical Max.
9µm core diameter SMF L km - 40 - - 60 - - 80 -
Data rate - Gbps 100 1.25 - 100 1.25 - 100 1.25 -
Transmitter
Center wavelength λC nm 1290 1310 1330 1290 1310 1330 1290 1310 1330
Spectral width (-20dB) Δλ nm - - 1 - - 1 - - 1
Side mode suppression ratio SMSR dB 30 - - 30 - - 30 - -
Average output power Pout dBm -3 - 2 0 - +5  +1  - +5 
Extinction ratio ER dB 8.2 - - 8.2 - - 8.2 - -
Rise/Fall time(20%～80%) tr/tf ns - - 0.26 - - 0.26 - - 0.26
Output optical eye - - Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004
TX disable assert time t_off us - - 10 - - 10 - - 10
Pout@TX disable asserted Pout dBm - - -45 - - -45 - - -45
Receiver
Center wavelength λC nm 1480 1550 1580 1480 1550 1580 1480 1550 1580
Receiver sensitivity Pmin dBm - - -23 - - -24 - - -24
Receiver overload Pmax dBm -3 - - -3 - - -3 - -
Return loss - dB 12 - - 12 - - 12 - -
Optical path penalty - - - - 1 - - 1 - - 1
LOS de-assert LOSD dBm - - -24 - - -25 - - -25
LOS assert LOSA dBm -35 - - -35 - - -35 - -
LOS hysteresis - dB 0.5 - - 0.5 - - 0.5 - -

Optical and Electrical Characteristics
Parameter Symbol Unit 1550nm FP and PIN, 550m 1550nm FP and PIN, 3km 1550nm DFB and PIN, 10km 1550nm DFB and PIN, 20km
Min. Typical Max. Min. Typical Max. Min. Typical Max. Min. Typical Max.
50µm core diameter MMF(800Mhz*km) L m - - 1000 - - - - - - - - -
62.5 core diameter MMF(500Mhz*km) L m - - 550 - - - - - - - - -
9µm core diameter SMF L km - - - - 3 - - 10 - - 20 -
Data rate - Gbps 100 1.25 - 100 1.063/1.25 - 100 1.063/1.25 - 100 1.063/1.25 -
Transmitter
Center wavelength λC nm 1500 1550 1580 1480 1550 1580 1520 1550 1580 1530 1550 1570
Spectral width(-20dB) Δλ nm - - 4 - - 4 - - 1 - - 1
Average output power Pout dBm -9.5 - -3 -14 - -8 -9 - -3 -8 - -3
Extinction ratio ER dB 6 - - 6 - - 6 9 - 6 9 -
Rise/Fall time(20%～80%) tr/tf ns - - 0.26 - - 0.26 - - 0.26 - - 0.26
Total jitter TJ ps - - 56.5 - - - - - - - - -
Output optical eye - - Compatible with IEEE 802.3ah-2004 Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004
TX disable assert time t_off us - - 10 - - 10 - - 10 - - 10
Pout@TX disable asserted Pout dBm - - -45 - - -45 - - -45 - - -45
Receiver
Center wavelength λC nm 1260 1310 1360 1260 - 1600 1260 - 1360 1260 1310 1360
Receiver sensitivity Pmin dBm - - -22 - - -22 - - -21 - - -22
Receiver overload Pmax dBm -3 - - -3 - - -3 - - -3 - -
Return loss - - - - - 12 - - 12 - - 12 - -
Optical path penalty - - - - - - - 1 - - 1 - - 1
LOS de-assert LOSD dBm - - -23 - - -23 - - -22 - - -23
LOS assert LOSA dBm -35 - - -35 - - -35 - - -35 - -
LOS hysteresis - dB 0.5 - - 0.5 - - 0.5 - - 0.5 - -

Optical and Electrical Characteristics
Parameter Symbol Unit 1550nm DFB and PIN, 40km 1550nm DFB and PIN, 60km 1550nm DFB and APD, 80km
Min. Typical Max. Min. Typical Max. Min. Typical Max.
9µm core diameter SMF L km - 40 - - 60 - - 80 -
Data rate - Gbps 100 1.25 - 100 1.25 - 100 1.25 -
Transmitter
Center wavelength λC nm 1480 1550 1580 1480 1550 1580 1480 1550 1580
Spectral width (-20dB) Δλ nm - - 1 - - 1 - - 1
Side mode suppression ratio SMSR dB 30 - - 30 - - 30 - -
Average output power Pout dBm -5 - 0 -2 - +3  0  - +5 
Extinction ratio ER dB 8.2 - - 8.2 - - 8.2 - -
Rise/Fall time(20%～80%) tr/tf ns - - 0.26 - - 0.26 - - 0.26
Output optical eye - - Compliant with IEEE 802.3 ah-2004 Compliant with IEEE 802.3 ah-2004  
TX disable assert time t_off us - - 10 - - 10 - - 10
Pout@TX disable asserted Pout dBm - - -45 - - -45 - - -45
Receiver
Center wavelength λC nm 1290 - 1330 1290 - 1330 1480 1550 1580
Receiver sensitivity Pmin dBm - - -23 - - -24 - - -33
Receiver overload Pmax dBm -3 - - -3 - - -8 - -
Return loss - dB 12 - - 12 - - 12 - -
Optical path penalty - - - - 1 - - 1 - - 1
LOS de-assert LOSD dBm - - -24 - - -25 - - -34
LOS assert LOSA dBm -35 - - -35 - - -45 - -
LOS hysteresis - dB 0.5 - - 0.5 - - 0.5 - -

FUNCTIONAL DESCRIPTION OF TRANSCEIVER

SFP TRANSCEIVER ELECTRICAL PAD LAYOUT

PIN FUNCTION DEFINITIONS
Pin Name Function Plug Seq. Notes
1 VeeT Transmitter ground 1 5)
2 TX fault Transmitter fault indication 3 1)
3 TX disable Transmitter disable 3 2) Module disables on high or open
4 MOD-DEF2 Module definition 2 3 3) Data line for serial ID.
5 MOD-DEF1 Module definition 1 3 3) Clock line for serial ID.
6 MOD-DEF0 Module definition 0 3 3) Grounded within the module.
7 Rate select Not connect 3 Function not available
8 LOS Loss of signal 3 4)
9 VeeR Receiver ground 1 5)
10 VeeR Receiver ground 1 5)
11 VeeR Receiver ground 1 5)
12 RD- Inv. received data out 3 6)
13 RD+ Received data out 3 6)
14 VeeR Receiver ground 1 5)
15 VccR Receiver power 2 7) 3.3V ± 5%
16 VccT Transmitter power 2 7) 3.3V ± 5%
17 VeeT Transmitter ground 1 5)
18 TD+ Transmit data In 3 8)
19 TD- Inv. transmit data In 3 8)
20 VeeT Transmitter ground 1 5)
Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the host board. Pull up voltage between 2.0V and VccT/R+0.3V. When high, output indicates a laser fault of some kinds. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.

2) TX disable is an input that is used to shutdown the transmitter optical output. It is pulled up within the module with a 4.7K – 10 KΩ resistor. Its states are:
Low (0 – 0.8V): Transmitter on
 (>0.8, < 2.0V): Undefined
High (2.0 – 3.465V): Transmitter Disabled
Open: Transmitter Disabled

3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10Kωresistor on the host board. The pull-up voltage shall be VccT or VccR (see Section IV for further details). Mod-Def 0 is grounded by the module to indicate that the module is present Mod-Def 1 is the clock line of two wire serial interface for serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID.

4) LOS is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor. Pull up voltage between 2.0V and VccT/R+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use).Low indicates normal operation. In the low state, the output will be pulled to < 0.8V.

5) VeeR and VeeT may be internally connected within the SFP module.

6) RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the module and is thus not required on the host board. The voltage swing on these lines will be between 370 and 2000 Mv differential (185 –1000 Mv single ended) when properly terminated.

7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP connector pin. Maximum supply current is 300Ma. Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1ohm should be used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30Ma greater than the steady state value.VccR and VccT may be internally connected within the SFP transceiver module.

8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module.. The AC coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 500 – 2400 Mv (250 – 1200Mv single-ended), though it is recommended that values between 500 and 1200 Mv differential (250 – 600Mv single-ended) be used for best EMI performance.
Performance Testing

Each module is tested before shipment to help ensure stable optical and electrical performance.

Compatibility Verification

Compatibility validation is available for major switch and router platforms.

Reliability Screening

Selected products support aging, temperature cycle, and stability testing for demanding applications.

Traceable Quality Control

Inspection and production records support more consistent quality control and batch traceability.

光模块产品详情订购信息---SFP

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