Specifications
The 155Mbps Bi-Directional SFP Optical Transceiver is a reliable and efficient solution for medium-distance communication over single-mode fiber (SMF) up to 20 kilometers. This transceiver is offered in two configurations: a 1310nm FP laser with a 1550nm PIN photodetector or a 1550nm FP laser with a 1310nm PIN photodetector, depending on the specific application needs. Compliant with industry standards, including IEC-60825 laser safety and RoHS regulations, the module is optimized for Ethernet, telecom, and Fiber Channel applications. It features a compact SFP package with an LC connector, operating on a single +3.3V power supply to ensure energy efficiency.
The transceiver delivers robust optical performance with an output power range of -15dBm to -8dBm for both transmitter configurations, paired with a receiver sensitivity of -34dBm to support reliable signal reception. It includes advanced features such as Loss of Signal (LOS) detection and LVPECL-compatible data input/output interfaces, offering enhanced diagnostics and operational control. With a power dissipation of just 1W, the module supports a commercial operating temperature range of 0°C to +70°C, with options available for industrial-grade performance between -40°C and +85°C. This combination of features makes it a dependable choice for high-speed optical communication systems in diverse environments.
The CT-MSFP-BX-20U and CT-MSFP-BX-20D are cost-effective hot-pluggable SFP modules for 155 Mb/s bidirectional links up to 20 km on 9/125 μm SMF. Using 1310 nm (U) or 1550 nm (D) FP transmitters with complementary PIN photodiode receivers, they deliver reliable optical connectivity for short-to-medium reach deployments. Operating from a single +3.3 V supply with <1 W maximum power dissipation, the modules support LVPECL-compatible electrical interfaces, EEPROM digital diagnostics, and robust EMI/ESD protection. Fully compliant with IEC-60825 Class 1 laser safety and RoHS standards, they are available in both commercial and industrial temperature grades.
Key Parameters
| Parameter | Value |
|---|---|
| Form factor / Connector | SFP, LC duplex |
| Data rate | 155 Mb/s |
| Tx wavelength | 1310 nm (U) / 1550 nm (D), FP laser |
| Rx wavelength | 1260–1360 nm (for 1310 nm Tx) / 1500–1600 nm (for 1550 nm Tx) |
| Fiber type / Reach | SMF, up to 20 km |
| Tx output power | –15 to –8 dBm |
| Extinction ratio | 10–18 dB |
| Rx sensitivity | ≤ –34 dBm |
| Rx overload | –3 dBm |
| LOS threshold | Assert –45 dBm, Deassert –34 dBm |
| Power consumption | ≤ 1 W |
| Supply voltage | 3.15–3.45 V (nom. 3.3 V) |
| Electrical interface | LVPECL-compatible differential I/O |
| EEPROM | Serial ID (A0h), SFF-8472 fields |
Environmental Ratings
| Category | Range |
|---|---|
| Operating case temperature (Commercial) | 0 to +70 °C |
| Operating case temperature (Industrial) | –40 to +85 °C |
| Storage temperature | –40 to +85 °C |
| Relative humidity | 5% – 95% (non-condensing) |
