Description
Features of 25G SFP28 Transceiver Module LR
- Supports 24.3Gbps to 28.1Gbps bit rates
- 1310nm DFB Laser and PIN photo-detector
- Up to 2kmon 9/125µm SMF
- Duplex LC receptacle optical interface compliant
- Hot pluggable
- All-metal housing for superior EMI performance
- RoHS6 compliant (lead free)
- Operating case temperature: Commercial: -5°C to +70°C; Extended: -20°C to +80°C; Industrial: -40°C to +85°C
Applications
- Data center: Interconnection among servers, switches, and routers (spine-leaf architecture);
- 5G network: 5G front-haul (Fronthaul) scenario, meeting the medium-distance connection requirements between base stations.
Standards
- Compliant with INF-8431
- Compliant with SFF-8472
- Compatible with IEEE802.3cc
25G SFP28 Transceiver Module LR Optical Parameters
| Parameter | Symbol | Min. | Typical | Max. | Unit | Note |
| Transmitter Section | ||||||
| Centre Wavelength | λc | 1295 | 1310 | 1325 | nm | |
| Spectral Width(-20dB) | Δλ | 1 | nm | |||
| Side Mode Suppression Ratio | SMSR | 30 | dB | |||
| Average Optical Power (avg.) | Pout | -5 | +2.0 | dBm | 1 | |
| Laser Off Power | Poff | – | – | -30 | dBm | |
| Extinction Ratio | ER | 3 | – | – | dB | 2 |
| Relative Intensity Noise | RIN | – | – | -130 | dB/Hz | |
| Transmitter and Dispersion
Penalty |
TDP | – | 2.7 | dB | ||
| Optical Return Loss Tolerance | – | – | 26 | dB | ||
| Output Optical Eye | Compliant with IEEE802.3cc eye masks when filtered | 2 | ||||
| Receiver Section | ||||||
| Receiver Center Wavelength | λc | 1260 | 1310 | 1355 | nm | |
| Receiver in Average Power | -11.4 | 2 | dBm | |||
| Receiver sensitivity(OMA) | Sen | -12 | dBm | 3 | ||
| Los Assert | LOSA | -26 | – | – | dBm | |
| Los Dessert | LOSD | – | – | -17 | dBm | |
| Los Hysteresis | LOSH | 0.5 | – | 5 | dB | |
| Overload | Pin-max | – | – | 2 | dBm | 3 |
| Receiver Reflectance | – | – | -26 | dB | ||
| Receiver Power (damage) | – | – | 3 | dBm | ||
Notes:
- The optical power is launched into 9/125µm SMF.
- Measured with a PRBS 231-1test pattern @25.78Gbps.
- Measured with a PRBS 231-1test pattern @78Gbps, ER=4dB, BER <10-6.
Timing Characteristics
| Parameter | Symbol | Min. | Typical | Max. | Unit |
| TX_Disable Assert Time | t_off | 100 | us | ||
| TX_Disable Negate Time | t_on | 2 | ms | ||
| Time to Initialize | t_start_up | 300 | ms | ||
| Tx_Fault Assert | t_fault_on | 1 | ms | ||
| Tx_Fault Reset | t_reset | 10 | us | ||
| Rx_LOS Assert Delay | t_los_on | 100 | us | ||
| Rx_LOS Negate Delay | t_los_off | 100 | us | ||
| Clock Frequency | fSCL | 0 | 400 | kHz |
Ordering information
| Part Number | Product Description |
| SFP28-25G-LR02 | 1310nm, 25Gbps, 2km, Duplex LC SFP28 Transceiver, -5ºC ~ +70ºC, With DDM. |
| SFP28-25G-LR02E | 1310nm, 25Gbps, 2km, Duplex LC SFP28 Transceiver, -20ºC ~ +80ºC, With DDM. |
| SFP28-25G-LR02T | 1310nm, 25Gbps, 2km, Duplex LC SFP28 Transceiver, -40ºC ~ +85ºC, With DDM. |
