Specifications
The 155Mbps Bi-Directional SFP Optical Transceiver is designed for ultra-long-distance communication over single-mode fiber (SMF) up to 120 kilometers. Featuring two configurations—1490nm DFB laser with a 1550nm PIN photodetector, or 1550nm DFB laser with a 1490nm PIN photodetector—the transceiver provides reliable performance for Ethernet, telecom, and Fiber Channel applications. It operates with a single +3.3V power supply and complies with industry standards, including IEC-60825 for laser safety and RoHS for environmental compliance. Its compact SFP package with LC connectors ensures seamless integration into networking systems.
The module offers a transmitter output power of 0dBm to +5dBm with an extinction ratio between 12dB and 18dB, while the receiver sensitivity reaches -36dBm. Additional features include Loss of Signal (LOS) detection and LVPECL-compatible data input/output interfaces. It operates efficiently across commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges, with low power dissipation of 1W. This transceiver is a dependable solution for high-speed, long-distance optical communication.
The CT-MSFP-BX-120U and CT-MSFP-BX-120D are hot-pluggable SFP modules that provide reliable 155 Mb/s bidirectional links over single-mode fiber up to 120 km. They integrate 1490 nm (U) or 1550 nm (D) DFB transmitters with complementary PIN photodiode receivers, enabling flexible deployment in long-distance networks. Operating on a single +3.3 V supply with <1 W power consumption, they feature LVPECL-compatible electrical interfaces, excellent EMI/ESD resistance, and digital diagnostics via EEPROM. Compliant with IEC-60825 laser safety and RoHS standards, they are available in commercial and industrial temperature grades.
Key Parameters
| Parameter | Value |
|---|---|
| Form factor / Connector | SFP, LC duplex |
| Data rate | 155 Mb/s |
| Tx wavelength | 1490 nm (U) / 1550 nm (D), DFB laser |
| Rx wavelength | 1490–1600 nm (for 1550 nm Tx) / 1440–1540 nm (for 1490 nm Tx) |
| Fiber type / Reach | SMF, up to 120 km |
| Tx output power | 0 to +5 dBm |
| Extinction ratio | 12–18 dB |
| Rx sensitivity | ≤ –36 dBm |
| Rx overload | 0 dBm |
| LOS threshold | Assert –45 dBm, Deassert –36 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), DDM 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) |
