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| Categories | SFP Optical Transceiver Module | 
|---|---|
| Brand Name: | E-link China | 
| Model Number: | LNK-SFP-2.5G-40 | 
| Certification: | CE, RoHS, FCC | 
| Place of Origin: | Shenzhen, China | 
| MOQ: | 1 piece | 
| Payment Terms: | T/T, Western Union, MoneyGram, Paypal | 
| Supply Ability: | 1000000000pcs/Month | 
| Delivery Time: | 3-5 working days | 
| Packaging Details: | 10 piece in 1 carton box | 
| Data Rate: | 2.5G | 
| Connector: | LC | 
| Distance: | 40KM | 
| Wavelength: | 1550nm | 
| Power: | 3.3V | 
| Warranty: | 2 years | 
| Price: | Negotiation | 
| Company Info. | 
| E-link China Technology Co., Ltd. | 
| Verified Supplier | 
| View Contact Details | 
| Product List | 
2.5G SFP Dual Fiber 1550nm DFB Up to 40km on SMF SFP Optical Transceiver Module
Features
Commercial : 0 to +70°C
Industrial : -40 to +85°C
Applications
Description
The SFP transceivers are high performance, cost effective modules supporting dual data-rate of 2.5Gbps and 40km transmission distance with SMF.
The transceiver consists of three sections: a DFB laser transmitter, a APD photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.
The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For
further information, please refer to SFP MSA.
Absolute Maximum Ratings
Table 1 - Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit | 
| Supply Voltage | Vcc | -0.5 | 4.5 | V | 
| Storage Temperature | Ts | -40 | +85 | °C | 
| Operating Humidity | - | 5 | 85 | % | 
Recommended Operating Conditions
Table 2 - Recommended Operating Conditions
| Parameter | Symbol | Min | Typical | Max | Unit | |
| Operating Case Temperature | Standard | Tc | 0 | +70 | °C | |
| Industrial | -40 | +85 | °C | |||
| Power Supply Voltage | Vcc | 3.13 | 3.3 | 3.47 | V | |
| Power Supply Current | Icc | 300 | mA | |||
| Data Rate | 2.5 | Gbps | ||||
Optical and Electrical Characteristics
Table 3 - Optical and Electrical Characteristics
| Parameter | Symbol | Min | Typical | Max | Unit | Notes | ||
| Transmitter | ||||||||
| Centre Wavelength | λc | 1280 | 1310 | 1340 | nm | |||
| Spectral Width (-20dB) | ∆λ | 1 | nm | |||||
| Side Mode Suppression Ratio | SMSR | 30 | dB | |||||
| Average Output Power | Pout | -2 | +3 | dBm | 1 | |||
| Extinction Ratio | ER | 9 | dB | |||||
| Optical Rise/Fall Time | tr/tf | 0.16 | ns | |||||
| Data Input Swing Differential | VIN | 400 | 1800 | mV | 2 | |||
| Input Differential Impedance | ZIN | 90 | 100 | 110 | Ω | |||
| TX Disable | Disable | 2.0 | Vcc | V | ||||
| Enable | 0 | 0.8 | V | |||||
| TX Fault | Fault | 2.0 | Vcc | V | ||||
| Normal | 0 | 0.8 | V | |||||
| Receiver | ||||||||
| Centre Wavelength | λc | 1260 | 1580 | nm | ||||
| Receiver Sensitivity | -28 | dBm | 3 | |||||
| Receiver Overload | -9 | dBm | 3 | |||||
| LOS De-Assert | LOSD | -30 | dBm | |||||
| LOS Assert | LOSA | -40 | dBm | |||||
| LOS Hysteresis | 1 | 4 | dB | |||||
| Data Output Swing Differential | Vout | 370 | 1800 | mV | 4 | |||
| LOS | High | 2.0 | Vcc | V | ||||
| Low | 0.8 | V | ||||||
Notes:
1. The optical power is launched into SMF.
2. PECL input, internally AC-coupled and terminated.
3. Measured with a PRBS 27-1 test pattern @2500Mbps, BER ≤1×10-12
4. Internally AC-coupled.
Timing and Electrical
Table 4 - Timing and Electrical
| Parameter | Symbol | Min | Typical | Max | Unit | 
| Tx Disable Negate Time | t_on | 1 | ms | ||
| Tx Disable Assert Time | t_off | 10 | µs | ||
| Time To Initialize, including Reset of Tx Fault | t_init | 300 | ms | ||
| Tx Fault Assert Time | t_fault | 100 | µs | ||
| Tx Disable To Reset | t_reset | 10 | µs | ||
| LOS Assert Time | t_loss_on | 100 | µs | ||
| LOS De-assert Time | t_loss_off | 100 | µs | ||
| Serial ID Clock Rate | f_serial_clock | 400 | KHz | ||
| MOD_DEF (0:2)-High | VH | 2 | Vcc | V | |
| MOD_DEF (0:2)-Low | VL | 0.8 | V | 
Diagnostics
Table 5 – Diagnostics Specification
| Parameter | Range | Unit | Accuracy | Calibration | 
| Temperature | 0 to +70 | °C | ±3°C | Internal / External | 
| -40 to +85 | ||||
| Voltage | 3.0 to 3.6 | V | ±3% | Internal / External | 
| Bias Current | 0 to 100 | mA | ±10% | Internal / External | 
| TX Power | -2 to +3 | dBm | ±3dB | Internal / External | 
| RX Power | -30 to -9 | dBm | ±3dB | Internal / External | 
|   | 
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