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The 1.25Gbps Compact SFP (CSFP) Optical Transceiver is designed for long-distance, bi-directional data communication over single-mode fiber (SMF) up to 40 kilometers. It integrates a DFB laser and a PIN photo-detector, supporting dual-channel operation for a data rate of up to 1250Mbps. Encased in a compact, hot-pluggable SFP form factor with an LC/UPC optical interface, this module is suitable for Point-to-Point FTTH applications, switched backplane networks, router/server interfaces, and switch-to-switch communication. It complies with the CSFP MSA and SFF-8472 standards, ensuring compatibility with conventional SFP systems and minimizing electromagnetic interference (EMI) through its metal enclosure.
Operating on a single +3.3V power supply, the transceiver is energy-efficient, consuming a maximum current of 450mA. It supports an operational temperature range from 0°C to +70°C, making it suitable for a wide range of commercial applications. The module’s advanced diagnostics capabilities, including Digital Diagnostic Monitoring (DDM), enable real-time monitoring of critical parameters such as temperature, voltage, bias current, and optical power. Alarm and warning thresholds provide early alerts for deviations from optimal operating conditions.
Optically, the transmitter operates with an output power ranging from -5dBm to 0dBm and features an extinction ratio of 9dB, ensuring clear signal differentiation. The receiver sensitivity is rated at -23dBm, with a saturation power of -1dBm, providing robust performance across diverse signal conditions. Loss of Signal (LOS) functionality is integrated, offering enhanced link diagnostics and fault detection.
Electrically, the transceiver supports a differential impedance of 100Ω for seamless integration with host systems. Its dual-channel architecture enables simultaneous upstream and downstream communication using wavelengths of 1310nm and 1490nm. Features like transmitter disable (TX Disable) and transmitter fault (TX Fault) allow for precise control and fault management.
In summary, the 1.25Gbps Compact SFP Optical Transceiver is a reliable and versatile solution for high-speed, long-distance networking. Its advanced optical and electrical performance, combined with robust diagnostic capabilities and compliance with industry standards, makes it an essential component for modern telecommunications and data networks.
This compact SFP transceiver supports 1.25 Gbps bidirectional data transmission over up to 40 km of 9/125 µm single-mode fiber. It is compliant with CSFP MSA Option 2 and SFF-8472, with two independent bidirectional optical channels (Ch A and Ch B) operating at 1310 nm / 1490 nm wavelengths. The unit is designed with a DFB laser transmitter, PIN photodetector receiver, and metal housing for low EMI. It operates from a 3.3 V supply, supports digital diagnostics monitoring (DDM), and is hot-pluggable for simplified deployment.
| Parameter | Value | Notes |
|---|---|---|
| Data rate | 1.25 Gbps (TX/RX) | — |
| Reach | 40 km | 9/125 µm SMF |
| TX wavelength | 1310 nm (U) / 1490 nm (D) | — |
| RX wavelength | 1490 nm (U) / 1310 nm (D) | — |
| TX output power | -5 to 0 dBm | Average |
| Extinction ratio | ≥9 dB | — |
| SMSR | ≥30 dB | — |
| Spectral width | ≤1 nm (-20 dB) | — |
| RX sensitivity | ≤-23 dBm | BER ≤1×10⁻¹², ER = 8 dB, PRBS 2⁷-1 |
| RX overload | -1 dBm | — |
| LOS assert/de-assert | -38 dBm / -24 dBm; hysteresis 0.5–6 dB | LOS high = signal lost |
| Eye mask | IEEE 802.3ah compliant | Class 1 laser |
| Parameter | Value | Notes |
|---|---|---|
| Supply voltage | 3.13–3.47 V (nom. 3.3 V) | — |
| Max supply current | 450 mA (total for TX+RX) | — |
| Power supply noise | ≤100 mVp-p (100 Hz–1 MHz) | — |
| Case temperature | 0 °C to +70 °C | Operating |
| Connector | LC/UPC | Pluggable |
| Form factor | Compact SFP (CSFP, Option 2) | Hot-pluggable, dual-channel |
| Diagnostics | SFF-8472 DDM (Temp, Vcc, TxBias, TxPower, RxPower) | I²C addresses A0h/A2h (Ch1), B0h/B2h (Ch2) |
| Control/Status | Tx Disable, Tx Fault, LOS | I²C register accessible |
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.
At Carritech Optics, we stand by the quality and reliability of our optical transceivers. That’s why we proudly offer a lifetime warranty on all products as a testament to our commitment to excellence and customer satisfaction.
Our lifetime warranty provides comprehensive coverage for the entire lifecycle of your optical transceivers, ensuring you experience complete peace of mind when choosing Carritech Optics. The warranty covers:
Should you ever need to make a warranty claim, our team is here to assist you. Simply contact our support team with your product details, and we’ll guide you through a quick and hassle-free process to resolve the issue.
Carritech Optics is dedicated to providing high-quality optical solutions that you can trust for the long haul. With our lifetime warranty, you can confidently invest in our products, knowing that we’re with you every step of the way.
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.
Carritech’s Opticode is an advanced transceiver programming solution that gives you complete flexibility across your optical network. Designed to ensure seamless compatibility with a wide range of OEM systems, Opticode allows you to quickly reconfigure transceivers to meet your specific requirements. The result is greater control, reduced costs, and a more adaptable, future-proof infrastructure.
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