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The 1.25Gbps Bi-Directional SFP Optical Transceiver is a robust solution designed for ultra-long-distance communication over single-mode fiber (SMF) up to 160 kilometers. Utilizing a 1490nm DFB laser with a 1550nm APD receiver (or vice versa, depending on the configuration), the transceiver supports Ethernet, telecom, and Fiber Channel applications. It operates on a single +3.3V power supply with low power dissipation of only 1W, ensuring energy-efficient performance. The module features an SFP package with an LC connector, excellent ESD protection, and compliance with laser safety standards (IEC-60825), as well as RoHS regulations for environmentally friendly deployment.
Optically, the transmitter provides a center wavelength of 1490nm or 1550nm, delivering an average output power of 0 to +5dBm, with an extinction ratio between 9dB and 15dB for superior signal clarity. The receiver sensitivity reaches -32dBm, supporting reliable data reception over extended distances. Advanced features include Loss of Signal (LOS) detection and digital diagnostics, ensuring consistent performance and ease of monitoring. Designed for reliable operation within commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges, this transceiver is an excellent choice for demanding high-speed, long-distance optical communication networks.
These hot-pluggable BiDi SFP modules support Gigabit Ethernet, Fibre Channel, and telecom applications requiring ultra-long-reach, single-fiber connectivity. They operate from a single +3.3 V rail, feature LVPECL-compatible I/O, and incorporate low-EMI design with robust ESD protection. The modules are IEC-60825 laser-safety compliant and RoHS compatible.
| Parameter | Symbol | Min | Max | Units |
|---|---|---|---|---|
| Storage temperature | Tst | −40 | +85 | °C |
| Supply voltage | Vcc | 0 | +3.6 | V |
| Operating relative humidity | RH | 5 | 95 | % |
| Parameter | Symbol | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply voltage | Vcc | 3.15 | 3.3 | 3.45 | V |
| Case temperature (Commercial) | Tc | 0 | — | +70 | °C |
| Case temperature (Industrial) | — | −40 | — | +85 | °C |
| Power dissipation | — | — | — | 1 | W |
| Data rate (nominal) | — | — | 1.25 | — | Gbps |
| Parameter | Variant | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Center wavelength | Tx 1490 | 1480 | 1490 | 1500 | nm |
| Center wavelength | Tx 1550 | 1540 | 1550 | 1560 | nm |
| RMS spectral width | Tx 1490 / Tx 1550 | — | — | 1 | nm |
| Average output power | Tx 1490 / Tx 1550 | 0 | — | +5 | dBm |
| Extinction ratio | — | 9 | — | 15 | dB |
| Rise/Fall time (20–80 %) | — | — | — | 0.26 | ns |
| Total jitter | — | — | — | 0.43 | UI |
| Optical eye: IEEE 802.3z and ANSI Fibre Channel compatible. |
| Parameter | Variant | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Center wavelength | Rx 1550 | 1500 | 1550 | 1600 | nm |
| Center wavelength | Rx 1490 | 1440 | 1490 | 1540 | nm |
| Sensitivity (Rsen) | — | — | — | −32 | dBm |
| Overload (Rov) | — | −7 | — | — | dBm |
| Return loss | — | 12 | — | — | dB |
| LOS assert (LOSA) | — | −45 | — | — | dBm |
| LOS de-assert (LOSD) | — | — | — | −32 | dBm |
| LOS hysteresis | — | 0.5 | — | 5 | dB |
BiDi pair mapping
CT-SFP-BX-160U: 1490 nm DFB Tx / 1550 nm APD Rx
CT-SFP-BX-160D: 1550 nm DFB Tx / 1490 nm APD Rx.
| Parameter | Symbol | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input differential impedance | Zin | 90 | 100 | 110 | Ω |
| Data input swing (differential) | Vin | 500 | — | 2400 | mV |
| TX Disable — High (disable) | — | 2.0 | — | Vcc | V |
| TX Disable — Low (enable) | — | 0 | — | 0.8 | V |
| TX Fault — Assert | — | 2.0 | — | Vcc | V |
| TX Fault — De-assert | — | 0 | — | 0.8 | V |
| Parameter | Symbol | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Output differential impedance | Zout | — | 100 | — | Ω |
| Data output swing (differential) | Vout | 370 | — | 2000 | mV |
| Rx_LOS — Assert | — | 2.0 | — | Vcc | V |
| Rx_LOS — De-assert | — | 0 | — | 0.8 | V |
EEPROM (A0h): SFP identifier, LC connector, nominal 1.25 Gbps, options (LOS, TX_DISABLE, TX_FAULT), wavelength codes for 1490/1550 nm, vendor fields per SFP ID map.
Key pins: TX Disable (input, pull-up inside module), TX Fault (open collector), LOS (open collector), MOD-DEF[0:2] for 2-wire serial ID; TD±/RD± are AC-coupled 100 Ω differential pairs.
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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