Specifications
The 1.25Gbps SFP Optical Transceiver is a high-performance module designed for ultra-long-distance data communication over single-mode fiber (SMF) up to 180 kilometers. Encased in a compact SFP package with an LC connector, the transceiver integrates a 1550nm DFB laser and an APD photodetector to ensure superior optical performance. This module supports data rates of up to 1.25Gbps, making it an excellent choice for Ethernet, telecom, and Fiber Channel applications. Its operation on a single +3.3V power supply and compatibility with LVPECL data input/output interfaces ensure seamless integration with host systems. Furthermore, compliance with IEC-60825 laser safety standards and RoHS regulations underlines its safety and environmental responsibility.
The transceiver operates reliably in diverse environments, with a supply voltage range of 3.15V to 3.45V and an operational temperature range of 0°C to +70°C for commercial applications and -40°C to +85°C for industrial use. With a maximum power dissipation of 1W, it ensures energy-efficient operation. Additionally, its design incorporates robust protection against electromagnetic interference (EMI) and electrostatic discharge (ESD), ensuring consistent performance even in demanding networking scenarios.
The optical performance of this transceiver is remarkable. The transmitter operates at a center wavelength of 1550nm, with an average output power range of +1dBm to +6dBm and an extinction ratio of 10dB to 15dB, ensuring strong signal integrity. The receiver supports wavelengths between 1260nm and 1620nm, with a sensitivity of -34dBm and an overload threshold of -7dBm. These characteristics meet IEEE 802.3z and ANSI Fiber Channel standards, ensuring compatibility and reliable data transmission over extended distances.
The module’s electrical features include a differential impedance of 100Ω and support for input swing differentials from 500mV to 2400mV. The receiver provides an output swing differential ranging from 370mV to 2000mV. Enhanced functionality is offered through features like TX Disable, TX Fault, and Loss of Signal (LOS) detection, which allow for precise control and fault monitoring in complex networking environments.
Overall, the 1.25Gbps SFP Optical Transceiver offers a dependable, high-performance solution for ultra-long-distance networking applications. Its advanced optical and electrical specifications, combined with adherence to industry standards, make it an invaluable component for modern telecommunications and data center infrastructure.
The CT-SFP-XZX+ is a high-performance hot-pluggable SFP module designed for 1.25 Gb/s optical links up to 180 km over single-mode fiber. It integrates a 1550 nm DFB laser transmitter with an APD photodiode receiver, providing high sensitivity (–34 dBm) and extended optical budget. With a single +3.3 V supply and <1 W power dissipation, it offers LVPECL-compatible I/O, EEPROM diagnostics, and robust EMI/ESD protection. Compliant with IEEE 802.3z Gigabit Ethernet, ANSI Fibre Channel, IEC-60825 Class 1 laser safety, and RoHS standards, it is suitable for commercial and industrial environments.
Key Parameters
| Parameter | Value |
|---|---|
| Form factor / Connector | SFP, LC duplex |
| Data rate | 1.25 Gb/s |
| Tx wavelength | 1550 nm, DFB laser |
| Rx wavelength | 1260–1620 nm |
| Fiber type / Reach | SMF, up to 180 km |
| Tx output power | +1 to +6 dBm |
| Extinction ratio | 10–15 dB |
| Rx sensitivity | ≤ –34 dBm (APD) |
| Rx overload | –7 dBm |
| LOS threshold | Assert –40 dBm, Deassert –32 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), diagnostics (SFF-8472) |
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) |
