The QLx111GRx is a settable single-channel receive-side equalizer with extended functionality for advanced protocols operating with line rates up to 11. 1Gb/s such as 10G Ethernet (10GBase-CR). The QLx111GRx compensates for the frequency dependent attenuation of copper twin-axial cables, extending the signal reach up to at least 10m on 28AWG cable. The small form factor, highly-integrated design is ideal for high-density data transmission applications including active copper cable assemblies. The equalizing filter within the QLx111GRx can be set to provide optimal signal fidelity for a given media and length. The compensation level for the filter is set by two external control pins. Operating on a single 1. 2V power supply, the QLx111GRx enables per channel throughputs of 10Gb/s to 11. 1Gb/s while supporting lower data rates including 8. 5, 6. 25, 5, 4. 25, 3. 125, and 2. 5Gb/s. The QLx111GRx uses current mode logic (CML) input/output and is packaged in a 3mmx3mm 16 lead QFN. LOS support is included for module applications.


  • Supports data rates up to 11.1Gb/s
  • Low power (<135mW)
  • Low latency (<500ps)
  • Single channel equalizer in a 3mmx3mm QFN package for straight route-through architecture and simplified routing
  • Adjustable equalizer boost
  • Supports 64b/66b encoded data long run lengths
  • Line silence preservation
  • 1.2V supply voltage
  • LOS support Benefits
  • Thinner gauge cable
  • Extends cable reach greater than 3x
  • Improved BER




  • SFP+ active copper cable modules
  • QSFP active copper cable modules
  • 10G Ethernet (10GBase-CR)
  • XFI
  • 40G Ethernet (40GBase-CR4)
  • Fibre Channel
  • High-speed active cable assemblies
  • High-speed printed circuit board (PCB) traces


Type Title Date
Datasheet PDF 629 KB
Brochure PDF 5.20 MB 日本語
End Of Life Notice PDF 603 KB
3 items

Design & Development