QLX4300-S45: Quad Lane Extender

The QLx4300-S45 is a settable quad receive-side equalizer with extended functionality for advanced protocols operating with line rates up to 3.125Gb/s such as InfiniBand (SDR) and 10GBase-CX4. The QLx4300-S45 compensates for the frequency dependent attenuation of copper twin-axial cables, extending the signal reach up to 40m on 24AWG cable.

The small form factor, highly-integrated quad design is ideal for high-density data transmission applications including active copper cable assemblies. The four equalizing filters within the QLx4300-S45 can each be set to one of 32 compensation levels, providing optimal signal fidelity for a given media and length. The compensation level for each filter can be set by either (a) three external control pins or (b) a serial bus interface. When the external control pins are used, 18 of the 32 boost levels are available for each channel. If the serial bus is used, all 32 compensation levels are available.

Operating on a single 1.2V power supply, the QLx4300-S45 enables per channel throughputs of up to 3.125Gb/s while supporting the lower data rates of 2.5Gb/s and 1.5Gb/s. The QLx4300-S45 uses current mode logic (CML) inputs/outputs and is packaged in a 4mmx7mm 46 lead QFN. Individual lane impedance select support is included for module applications.

Key Features
  • Supports data rates up to 3.125Gb/s
  • Low power (78mW per channel)
  • Low latency (<500ps)
  • Four equalizers in a 4mmx7mm QFN package for straight route-through architecture and simplified routing
  • Each equalizer boost is independently pin selectable and programmable
  • Beacon signal support and line silence preservation
  • 1.2V supply voltage
  • Individual channel power-down (impedance select) Benefits
  • Thinner gauge cable
  • Extends cable reach greater than 3x
  • Improved BER
Applications
  • InfiniBand (SDR)
  • 10GBase-CX4
  • PCI Express (Gen 1)
  • DisplayPort
  • XAUI
  • SAS (1.0)
  • High-speed active cable assemblies
  • High-speed printed circuit board (PCB) traces
Typical Diagram
Datasheets
TitleTypeUpdatedSizeOther Languages
QLx4300-S45 DatasheetPDF19 Nov 20142.12 MB
User Guides
TitleTypeUpdatedSizeOther Languages
EBL4300CI-EVALZ User GuidePDF05 Dec 2014691 KB
Order Information
Part NumberPackage TypeWeight(g)PinsMSL RatingPeak Temp (°C)RoHS Status
QLX4300SIQSR46 Ld QFN T+R0.07461260RoHS
QLX4300SIQT746 Ld QFN T+R0.07461260RoHS
QLx4300-S45 Datasheet 19 Nov 2014
46 Ld QFN T+R ISL36411
QLX4300-S45
EBL4300CI-EVALZ User Guide 05 Dec 2014