QLX4300-S45 Datasheet, PDF (1/21 Pages) Intersil Corporation – Quad Lane Extender

Quad Lane Extender
QLx4300-S45
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.
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)
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
Benefits
• Thinner gauge cable
• Extends cable reach greater than 3x
• Improved BER
Typical Application Circuit
QLX4300-S45
QLX4300-S45
<40M 24AWG
November 19, 2009
FN6982.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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