Specifications
The 1.25Gbps SFP Optical Transceiver is a reliable module tailored for short-range data communication over multimode fiber (MMF) up to 550 meters. Encased in a compact SFP package with an LC connector, the transceiver utilizes an 850nm VCSEL laser and PIN photodetector to ensure robust and efficient performance. It supports data rates of up to 1.25Gbps, making it suitable for Ethernet, telecom, and Fiber Channel applications. The module operates on a single +3.3V power supply and is compatible with LVPECL data input/output interfaces, ensuring seamless integration with various host systems. Its compliance with IEC-60825 laser safety standards and RoHS regulations reflects its commitment to safety and environmental responsibility.
This transceiver is designed to function across a range of environments, with a supply voltage range of 3.15V to 3.45V and operating temperatures from 0°C to +70°C for commercial use, and -40°C to +85°C for industrial settings. The device maintains energy efficiency with a maximum power dissipation of 1W. It also boasts excellent protection against electromagnetic interference (EMI) and electrostatic discharge (ESD), ensuring stable operation in high-performance networks.
The optical specifications of the transceiver emphasize precision and reliability. The transmitter operates at a center wavelength of 850nm, with an average output power ranging from -8dBm to -3dBm and an extinction ratio of 9dB to 15dB. The receiver supports wavelengths between 770nm and 860nm, with a sensitivity of -19dBm and an overload threshold of -3dBm. These features align with IEEE 802.3z and ANSI Fiber Channel standards, ensuring compatibility with modern networking protocols and high-quality data transmission.
Electrically, the transceiver includes a differential impedance of 100Ω, supporting input swing differentials between 500mV and 2400mV. The receiver provides an output swing differential from 370mV to 2000mV. Additional features, such as TX Disable, TX Fault, and Loss of Signal (LOS) detection, offer precise control and diagnostic capabilities, enhancing the module’s functionality in various configurations.
Overall, the 1.25Gbps SFP Optical Transceiver is a dependable, high-performance solution for short-distance networking applications. Its robust design, combined with adherence to industry standards, ensures reliable operation in diverse environments, making it a valuable component for modern networking infrastructure.
The CT-SFP-SX-1 is a cost-effective hot-pluggable SFP module designed for 1.25 Gb/s optical links over multimode fiber up to 550 m. It incorporates an 850 nm VCSEL transmitter with a PIN photodiode receiver, delivering reliable short-distance connectivity for LAN and enterprise networks. Operating on a single +3.3 V supply with <1 W power consumption, the module supports LVPECL-compatible differential I/O, EEPROM diagnostics, and robust EMI/ESD protection. Fully 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 | 850 nm, VCSEL |
| Rx wavelength | 770–860 nm |
| Fiber type / Reach | MMF (50/125 µm), up to 550 m |
| Tx output power | –9 to –3 dBm |
| Extinction ratio | ≥ 9 dB |
| Rx sensitivity | ≤ –20 dBm (PIN) |
| Rx overload | –3 dBm |
| LOS threshold | Assert –30 dBm, Deassert –20 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) |
