The CT-SFP-BX-80U and CT-SFP-BX-80D are advanced bi-directional (BIDI) SFP optical transceivers designed for 1.25Gbps data transmission over single-mode fiber (SMF) distances of up to 80 kilometers. The CT-SFP-BX-80U employs a 1490nm DFB laser and a 1550nm PIN photodetector, while the CT-SFP-BX-80D uses a 1550nm DFB laser and a 1490nm PIN photodetector. Packaged in a compact SFP form factor with LC connectors, these modules are ideal for Ethernet, Telecom, and Fiber Channel applications. Fully compliant with IEC-60825 laser safety standards and RoHS regulations, they deliver reliable performance in demanding environments.
Key features include operation within a wide temperature range (-40°C to +85°C for industrial grade, 0°C to +70°C for commercial grade) and compatibility with a +3.3V power supply. The modules boast excellent optical performance, including high extinction ratios, precise wavelength control (1490nm/1550nm), and low EMI. Robust electrical characteristics such as LVPECL-compatible interfaces and ESD protection make these transceivers suitable for long-distance and high-speed optical communication networks.
These BiDi SFP modules are optimized for Ethernet, Fibre Channel, and telecom applications where single-fiber operation up to 80 km is required. Operating from a single +3.3 V supply, they feature LVPECL-compatible I/O, low EMI design, and strong ESD protection. The devices meet IEC-60825 laser safety and RoHS compliance standards.
| 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 | — | — | 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 | — | 10 | — | 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) | — | — | — | −24 | dBm |
| Overload (Rov) | — | −3 | — | — | dBm |
| Return loss | — | 12 | — | — | dB |
| LOS assert (LOSA) | — | −36 | — | — | dBm |
| LOS de-assert (LOSD) | — | — | — | −24 | dBm |
| LOS hysteresis | — | 0.5 | — | 5 | dB |
BiDi pair mapping
CT-SFP-BX-80U: 1490 nm DFB Tx / 1550 nm PIN Rx
CT-SFP-BX-80D: 1550 nm DFB Tx / 1490 nm PIN Rx.
| Parameter | Symbol | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input differential impedance | Zin | 90 | 100 | 110 | Ω |
| Data input swing (diff.) | 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 (diff.) | 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, 1.25 Gbps nominal BR, LOS/TX_DISABLE/TX_FAULT functions, wavelength codes for 1490/1550 nm, vendor fields.
Key pins: TX Disable (input with pull-up), TX Fault (open collector), LOS (open collector), MOD-DEF[0:2] for 2-wire serial ID. TD± and 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.
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.
Intuitive interface allows you to reprogram transceivers quickly, without complex processes or specialist training.
Reprogram transceivers to work reliably across a wide range of OEM systems.
Gain the flexibility to adapt, optimise, and scale your optical infrastructure with confidence.
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