25G SFP28 BIDI ELR Transceiver for 20km SMF Links, 1270/1330nm Simplex LC
SFP28BD-25-1213-20(ELR)-LC
- Broad Multi-Brand Compatibility
- Flexible Customization Support
- Tested for Reliable Performance
- Fast Response & Delivery
- Professional Technical Support
The FC-LINK SFP28 BIDI 25G 1270/1330nm 20km ELR LC SX transceiver is a high-performance module designed for bidirectional optical data transmission over single-mode fiber, supporting distances of up to 20km. It complies with SFF-8472, SFF-8402, SFF-8432, and applicable sections of SFF-8431 standards.Equipped with digital diagnostic monitoring via a 2-wire serial interface, as outlined in SFF-8472, this transceiver ensures reliable performance and precise monitoring for seamless integration into high-speed network applications.
| SPECIFICATIONS | |||
|---|---|---|---|
| Product Model | SFP28BD-25-1213-20(ELR)-LC | Manufacturer Brand | FC-LINK |
| Package Type | SFP28 | Optical Connector | LC |
| Max Data Rate | 25.78Gbps | Channel Data Rate | - |
| Effective Transmission Distance | 20km | ||
| Wavelength | 1270nm-TX/1330nm-RX | Operating Voltage | 3.3V |
| Fiber Type | SMF | Core Size | 9/125µm |
| Transmitter Type | DFB BiDi | Receiver Type | PIN |
| TX Power | 0~6dBm | Receiver Sensitivity | <-14dBm |
| Digital Optical Monitoring(DOM) | YES | Receiver Overload | 2.5dB |
| Power Consumption | ≤1.2W | Protocols | eCPRI, SFF-8472, SFF-8432, SFF-8431 |
| Operating Temperature(Commercial) | 0℃~+70℃ | Storage Temperature(Commercial) | -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.
Compatible Brands
Customization Options
Vendor Coding
Private Label
Custom Part Number
Packaging Design
Temperature Grade Selection
| Absolute Maximum Ratings | |||||||||
| Parameter | Symbol | Unit | Min. | Max. | |||||
| Storage temperature range | TS | °C | -40 | 85 | |||||
| Relative humidity | RH | % | 0 | 85 | |||||
| Supply voltage | VCC | V | -0.3 | 3.6 | |||||
| Recommended Operating Conditions | |||||||||
| Parameter | Symbol | Unit | Min. | Typ. | Max. | ||||
| Operating case temperature range | Tc | ℃ | -40 | - | 85 | ||||
| Power supply voltage | VCC | V | 3.135 | 3.3 | 3.465 | ||||
| Bit rate | BR | Gb/s | 24.33024 | 25.78125 | - | ||||
| Max. supported link length | L | km | 10 | 20 | - | ||||
| Electrical Characteristics | |||||||||
| Parameter | Symbol | Unit | Min. | Typ. | Max. | Note | |||
| Supply voltage | VCC | V | 3.14 | 3.3 | 3.46 | - | |||
| Supply current | Icc | mA | - | - | 360 | @3.3V | |||
| Transmitter | |||||||||
| Input differential impedance | Rin | Ω | - | 100 | - | - | |||
| Single ended data input swing | VIN | mVp-p | 90 | - | 450 | - | |||
| Transmit disable voltage | VDIS | V | 2 | - | VCCHOST | - | |||
| Transmit enable voltage | VEN | V | VEE | - | VEE+0.8 | - | |||
| Transmit fault assert voltage | VFA | V | 2.2 | - | VCCHOST | - | |||
| Transmitfault de-assert voltage | VFDA | V | VEE | - | VEE+0.4 | - | |||
| Receiver | |||||||||
| Single ended data output swing | VOD | mVp-p | 200 | - | 450 | - | |||
| LOS fault | VLOSFT | V | 2.2 | - | VccHOST | - | |||
| LOS normal | VLOSNR | V | VEE | - | Vee+0.4 | - | |||
| Optical Characteristics | |||||||||
| Parameter | Symbol | Unit | Min. | Typ. | Max | Notes | |||
| Transmitter | |||||||||
| Center wavelength range | λ | nm | 1320 | - | 1340 | Downstream | |||
| - | - | 1280 | Upstream | ||||||
| Spectral width | -20dB | - | nm | - | - | 1 | - | |||
| Side mode suppression ratio | SMSR | dB | 30 | - | - | - | |||
| Average launch power | PAVG | dBm | 0 | - | 6 | - | |||
| OMA launch power | POMA | dBm | -2 | - | - | - | |||
| Transmitter and dispersion penalty 25G | BER=5E-5 | TDP | dB | - | - | 4 | - | |||
| Average launch power of OFF transmitter | POFF | dBm | - | - | -30 | - | |||
| Extinction ratio | ER | dB | 3.5 | - | - | - | |||
| RIN20OMA | RIN | dB/Hz | - | - | -130 | - | |||
| Optical return loss tolerance | - | dB | - | - | 20 | - | |||
| Mask margin | - | % | 5 | - | - | 1 | |||
| Receiver | |||||||||
| Center wavelength | λr | nm | 1260 | 1270 | 1280 | Downstream | |||
| 1320 | 1330 | 1340 | Upstream | ||||||
| Overload | - | dBm | 2.5 | - | - | - | |||
| OMA receiver sensitivity up to 25G 5E-5 | POMA | dBm | - | - | -14 | - | |||
| LOS de-assert | LOSA | dBm | -30 | - | - | - | |||
| Los assert | LOSD | dBm | - | - | -17 | - | |||
| Los hysteresis | - | dB | 0.5 | - | - | - | |||
| Note 1: Template: {0.31, 0.40, 0.45, 0.34, 0.38, 0.40}, Hit Ratio: 5E-5 | |||||||||
| Pin Function Definitions |
| TRANSCEIVER PIN DESCRIPTIONS | |||||||||
| Pin No. | Symbol | Logic | Description | ||||||
| 1 | VeeT | - | Connected to signal ground on the host board. | ||||||
| 2 | TX fault | LVTTL output | Module transmitter fault output | ||||||
| 3 | TX disable | LVTTL input | Module transmitter disable control | ||||||
| 4 | SDA | LVTTL input/output | 2-wire serial interface data | ||||||
| 5 | SCL | LVTTL input/output | 2-wire serial interface clock | ||||||
| 6 | MOD_ABS | - | Module absent (connected to Module ground) | ||||||
| 7 | RS0 | LVTTL input | Rate select 0 (Rx): Low=CDR Bypass; high=CDR select | ||||||
| 8 | LOS | LVTTL output | Receiver loss of signal | ||||||
| 9 | RS1 | LVTTL input | Rate select 1 (Tx): Low=CDR Bypass; high=CDR select | ||||||
| 10,11,14 | VeeR | - | Connected to signal ground on the host board. | ||||||
| 12 | RD- | CML output | Receiver inverted data output, internally AC coupled and terminated. | ||||||
| 13 | RD+ | CML output | Receiver non-inverted data output, internally AC coupled and terminated. | ||||||
| 15 | VccR | - | Receiver power 3.3V supply | ||||||
| 16 | VccT | - | Transmitter power 3.3V supply | ||||||
| 18 | TD+ | CML input | Transmitter non-inverted data input, internally AC coupled and terminated. | ||||||
| 19 | TD- | CML input | Transmitter inverted data Input, internally AC coupled and terminated | ||||||
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.
