Quad Lane Extender
QLx4600-SL30
The QLx4600-SL30 is a settable quad receive-side
equalizer with extended functionality for advanced
protocols operating with line rates up to 6.25Gb/s such
as InfiniBand (SDR and DDR) and 10GBase-CX4. The
QLx4600-SL30 compensates for the frequency
dependent attenuation of copper twin-axial cables,
extending the signal reach up to 30m 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 QLx4600-SL30 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
QLx4600-SL30 enables per channel throughputs of up to
6.25Gb/s while supporting lower data rates including 5,
4.25, 3.125, and 2.5Gb/s. The QLx4600-SL30 uses
current mode logic (CML) inputs/outputs and is packaged
in a 4mmx7mm 46 lead QFN. Individual lane LOS
support is included for module applications.
QLx4600-SL30
Features
• Supports data rates up to 6.25Gb/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 lane LOS support
Applications
• QSFP active copper cable modules
• InfiniBand (SDR and DDR)
• 10GBase-CX4
• XAUI and RXAUI
• SAS (2.0)
• High-speed active cable assemblies
• High-speed printed circuit board (PCB) traces
Benefits
• Thinner gauge cable
• Extends cable reach greater than 3x
• Improved BER
Typical Application Circuit
November 19, 2009
FN6981.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
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Copyright Intersil Americas Inc. 2009. All Rights Reserved
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