SFP 1000BASE-CWDM 40km

The 1.25Gbps CWDM Single-mode SFP Transceiver is a high-performance optical module designed for reliable data communication over single-mode fiber (SMF) up to 40 kilometers. It features a DFB laser transmitter and PIN photo-detector, encased in a hot-pluggable SFP package with a duplex LC/UPC optical interface. This transceiver supports data rates of up to 1.25Gbps, making it ideal for applications such as switch-to-switch interfaces, Gigabit Ethernet, backplane applications, router/server interfaces, and other optical links. Compliant with SFF-8472 standards, it offers advanced features like digital diagnostic monitoring.

Engineered for efficiency, the transceiver operates on a single +3.3V power supply with low power dissipation. Its metal enclosure minimizes electromagnetic interference (EMI), ensuring stable performance in demanding network environments. The module supports a wide operating temperature range of 0°C to +70°C, making it suitable for various commercial networking scenarios. In addition, it complies with RoHS regulations, ensuring environmentally friendly operation.

The optical performance is a key highlight, with a transmitter average output power range of -5dBm to 0dBm and an extinction ratio of 9dB. It utilizes CWDM wavelengths ranging from 1270nm to 1610nm, allowing for flexible channel allocation and efficient bandwidth usage. The receiver provides a sensitivity of -24dBm and can handle input wavelengths from 1270nm to 1610nm, making it compatible with a range of CWDM systems. Key features like Loss of Signal (LOS) and Transmitter Disable (Tx Disable) provide enhanced operational control and diagnostics.

Electrically, the transceiver offers a differential line input impedance of 100Ω and complies with IEEE802.3z for transmitter output eye mask requirements. It is compatible with standard 2-wire serial communication protocols for accessing identification and diagnostic information. Real-time monitoring of parameters such as temperature, laser bias current, transmitted optical power, and received optical power is supported, with alarm flags for operating conditions outside normal ranges.

In summary, the 1.25Gbps CWDM Single-mode SFP Transceiver is a versatile and reliable solution for medium-range networking applications. Its advanced optical and electrical features, coupled with compliance to industry standards, make it a valuable component for modern telecommunications and data infrastructure.

This CWDM SFP module offers flexible wavelength selection from 1270 to 1610 nm, providing efficient wavelength multiplexing for metro and access networks. It supports +3.3 V single-rail operation, includes low power consumption and EMI shielding, and is hot-pluggable for easy deployment. Enhanced DDM (per SFF-8472) allows real-time monitoring of temperature, bias current, optical power, and supply voltage.

Key Features

• Data rate: 1.25 Gbps
• Reach: up to 40 km over 9/125 µm SMF
• Laser: DFB transmitter
• Receiver: PIN-TIA
• Optical interface: Duplex LC/UPC
• Power supply: +3.3 V, max 300 mA
• Hot-pluggable SFP footprint
• Digital Diagnostics Monitoring (DDM)
• Operating case temperature: 0 °C to +70 °C
• RoHS compliant, lead-free

CWDM Wavelength Options

Optical Characteristics (DFB Tx / PIN Rx)

• Transmitter:
  • Output power: −5 to 0 dBm
  • Extinction ratio: ≥ 9 dB
  • SMSR: ≥ 30 dB
  • Spectrum bandwidth: ≤ 1 nm
  • Tx off power: ≤ −45 dBm
• Receiver:
  • Sensitivity: ≤ −24 dBm
  • Overload: −1 dBm
  • LOS assert: ≤ −25 dBm
  • LOS de-assert: ≥ −38 dBm
  • Wavelength range: 1270–1610 nm

Electrical Characteristics

• Supply voltage: 3.13–3.47 V
• Max current: 300 mA (Tx + Rx combined)
• Differential input impedance: 100 Ω
• TTL logic for Tx Disable, Tx Fault, and LOS outputs.