Multi-rate SFP transceiver, 1.25 to 4.25Gb/s, 1310nm DFB, single mode, 10km, -40 to 85°C

Manufacturer's part number :


Manufacturer Coretek


Description :

The CT-4250TSP-NE4L-E GD from Coretek Opto Corp. is a high-performance and cost-effective module for serial optical data communication applications specified for multi-rate from 1.25 to 4.25 Gb/s. It operates with +3.3V power supply. The module is intended for single mode fibre, operates at a nominal wavelength of 1310nm and complies with multi-source agreement (MSA) small form factor pluggable (SFP). Each module is integrated digital diagnostics functions via an I2C serial interface.

The module is a duplex LC connector transceiver designed to provide Gigabit Ethernet compliant link at 1.25 Gb/s, 10GBASE LX-4 compliant link at 3.125 Gb/s, and fibre channel compliant link at 4.25 Gb/s medium reach applications. The characteristics are performed in accordance with ANSI fibre channel physical interface (FC-PI-2) Rev 7.0.



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  • 1310 nm DFB LD
  • Multi-rate: from 1.25 to 4.25 Gb/s, NRZ, with rate select
  • Single +3.3V power supply
  • RoHS compliant and lead-free
  • AC/AC differential electrical interface
  • Compliant with multi-source agreement (MSA) small form factor pluggable (SFP)
  • Compliant with SFF-8472 digital diagnostic monitoring interface
  • Duplex LC connector
  • Compliance with ANSI specifications for fibre channel applications
  • Compliance with specifications for 10GBASE LX-4 at 3.125 Gb/s
  • Compliance with specifications for IEEE-802.3z Gigabit Ethernet at 1.25 Gb/s
  • Eye safety designed to meet Laser Class 1 comply with EN60825-1
  • Firmware version: SFP_4G_LRMR-071317
  • Applications: Fibre channel links, 10GBASE LX-4, Gigabit Ethernet
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Form factor SFP  

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Distance (km) 1-15  
Protocol Datacom/telecom  
Data rate 2.488 - 4.25 Gb/s  
Temperature range Industrial