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The 25Gbps Bi-Directional SFP28 Transceiver is a high-performance module designed for single-mode fiber (SMF) communication over distances of up to 10 kilometers. Supporting data rates from 24.33Gbps to 25.78Gbps, it is ideal for applications such as 25GE BASE-LR Ethernet and CPRI Option 10/eCPRI. This transceiver is available in two configurations: the CT-SFP28-BX-20U, which features a 1270nm DML laser transmitter and a 1330nm receiver, and the CT-SFP28-BX-20D, which uses a 1330nm DML laser transmitter and a 1270nm receiver. With compliance to SFP28 MSA, SFF-8472, SFF-8431, and SFF-8432 standards, it ensures compatibility with a wide range of networking equipment.
Operating on a +3.3V power supply and consuming less than 1.2W, the module is highly energy-efficient. The transmitter delivers an average optical power output between -4dBm and +4dBm, with an extinction ratio of 3.5dB, while the receiver supports a sensitivity of -11dBm and an overload threshold of +2dBm. Advanced features like Loss of Signal (LOS) detection and integrated digital diagnostics allow real-time monitoring of parameters such as temperature, voltage, bias current, transmitted power, and received power. Designed for commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges, the hot-pluggable transceiver ensures reliable performance and easy integration into modern networking systems.
These hot-pluggable transceivers support 24.33 to 25.78 Gbps operation and comply with IEEE 802.3cc, SFP28 MSA, SFF-8431, SFF-8432, and SFF-8472 standards. They use a simplex LC connector for single-fiber transmission: BX-20U transmits at 1270 nm and receives at 1330 nm, while BX-20D transmits at 1330 nm and receives at 1270 nm. Designed for 10 km reach, the modules integrate internal CDR on both Tx and Rx chains to ensure low jitter and stable operation. Power consumption is <1.2 W with a single 3.3 V supply, and both commercial (0 °C to +70 °C) and industrial (−40 °C to +85 °C) temperature ranges are available. Integrated DDMI provides real-time monitoring of key operating parameters.
Key Parameters
| Specification | CT-SFP28-BX-20U | CT-SFP28-BX-20D | Notes |
|---|---|---|---|
| Form factor / connector | SFP28 (hot-pluggable), LC simplex | SFP28 (hot-pluggable), LC simplex | Single-fiber bidirectional |
| Data rate | 24.33 – 25.78 Gbps | 24.33 – 25.78 Gbps | Supports rate adaptation |
| Reach | Up to 10 km SMF | Up to 10 km SMF | — |
| Tx wavelength | 1270 nm | 1330 nm | DML laser |
| Rx wavelength | 1330 nm | 1270 nm | PIN/TIA receiver |
| Tx optical power | −4 to +4 dBm | −4 to +4 dBm | Average |
| Extinction ratio | ≥ 3.5 dB | ≥ 3.5 dB | — |
| Spectral width | ≤ 1 nm | ≤ 1 nm | — |
| Side-mode suppression | ≥ 30 dB | ≥ 30 dB | — |
| Tx off power | ≤ –30 dBm | ≤ –30 dBm | — |
| Receiver sensitivity | ≤ −11 dBm (OMA) | ≤ −11 dBm (OMA) | BER ≤ 5 × 10⁻⁵ |
| Receiver overload | +2 dBm max | +2 dBm max | — |
| Receiver reflectance | ≤ –12 dB | ≤ –12 dB | — |
| LOS assert/de-assert | −30 dBm / −17 dBm | −30 dBm / −17 dBm | 0.5 dB hysteresis |
| Supply voltage | 3.14 – 3.46 V | 3.14 – 3.46 V | Single 3.3 V supply |
| Power consumption | <1.2 W | <1.2 W | — |
| Diagnostics | Temp., bias, Tx/Rx power, Vcc | Temp., bias, Tx/Rx power, Vcc | Digital diagnostics (DDMI) |
| Operating case temp. | 0 °C to +70 °C (commercial), −40 °C to +85 °C (industrial) | Same | — |
| Compliance | IEEE 802.3cc, SFP28 MSA, SFF-8431/8432/8472, RoHS, EN 60825 Class 1 | Same | Standards compliant |
At Carritech, we pride ourselves on our exceptional service and commitment to meeting our customers’ needs. Our extensive range of SFP transceivers is designed to cater to various requirements, ensuring that you receive the best solutions for your projects. We understand the importance of timely delivery, and our efficient processes are geared towards providing you with the products you need as quickly as possible. Our dedicated team works tirelessly to ensure that your orders are processed and dispatched promptly, so you can rely on us for swift and reliable service.
We recognise that every project is unique, and our flexible approach allows us to adapt to your specific needs. Whether you require immediate delivery or have more complex requirements, we are here to support you every step of the way. Our commitment to customer satisfaction means that we go above and beyond to ensure that you receive your SFP transceivers in a timely manner, without compromising on quality. Trust Carritech to deliver the solutions you need, when you need them.
En Carritech Optics, garantizamos la calidad y fiabilidad de nuestros transceptores ópticos. Por eso ofrecemos con orgullo una garantía de por vida en todos los productos como testimonio de nuestro compromiso con la excelencia y la satisfacción del cliente.
Nuestra garantía de por vida proporciona una cobertura completa durante todo el ciclo de vida de sus transceptores ópticos, asegurándole una total tranquilidad al elegir Carritech Optics. La garantía cubre:
Si alguna vez necesita hacer una reclamación de garantía, nuestro equipo está aquí para ayudarle. Solo tienes que ponerte en contacto con nuestro equipo de asistencia con los datos de tu producto y te guiaremos a través de un proceso rápido y sin complicaciones para resolver el problema.
Carritech Optics se dedica a proporcionar soluciones ópticas de alta calidad en las que puede confiar a largo plazo. Con nuestra garantía de por vida, puede invertir con confianza en nuestros productos, sabiendo que estamos con usted en cada paso del camino.
At Carritech Optics, every product we supply undergoes a meticulous testing process designed to guarantee exceptional quality, reliability, and consistency. Our manufacturer operates within a professional laboratory environment, where advanced testing equipment and industry-standard procedures are used to carefully evaluate each item.
Opticode de Carritech es una solución avanzada de programación de transceptores que le ofrece una flexibilidad total en su red óptica. Diseñado para garantizar una compatibilidad perfecta con una amplia gama de sistemas OEM, Opticode le permite reconfigurar rápidamente los transceptores para satisfacer sus requisitos específicos. El resultado es un mayor control, una reducción de costes y una infraestructura más adaptable y preparada para el futuro.
Nuestro equipo de profesionales multilingües está a su disposición para ayudarle a entender nuestros productos y satisfacer sus necesidades. Solo tiene que introducir sus datos a continuación y nuestro equipo se pondrá en contacto con usted.
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