QLX411GRX Datasheet, PDF (1/11 Pages) Intersil Corporation – Quad Lane Extender

Quad Lane Extender
QLx411GRx
The QLx411GRx is a settable quad receive-side equalizer
with extended functionality for advanced protocols
operating with line rates up to 11.3Gb/s such as
InfiniBand (SDR, DDR and QDR) and 40G Ethernet
(40GBase-CR4). The QLx411GRx 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 quad design is
ideal for high-density data transmission applications
including active copper cable assemblies. The four
equalizing filters within the QLx411GRx can each be set
to provide optimal signal fidelity for a given media and
length. The compensation level for each filter is set by
two external control pins.
Operating on a single 1.2V power supply, the QLx411GRx
enables per channel throughputs of 10Gb/s to 11.3Gb/s
while supporting lower data rates including 8.5, 6.25, 5,
4.25, 3.125, and 2.5Gb/s. The QLx411GRx 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.
Typical Application Circuit
Features
• Supports data rates up to 11.3Gb/s
• Low power (135mW 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
• Supports 64b/66b encoded data – long run lengths
• Line silence preservation
• 1.2V supply voltage
• Individual lane LOS support
Applications
• QSFP active copper cable modules
• InfiniBand SDR, DDR and QDR
• 40G Ethernet (40GBase-CR4)
• XAUI and RXAUI
• High-speed active cable assemblies
• High-speed printed circuit board (PCB) traces
Benefits
• Thinner gauge cable
• Extends cable reach greater than 3x
• Improved BER
Tx1[P,N]
Tx2[P,N]
Tx3[P,N]
Tx4[P,N]
Rx1[P,N]
0.1μF
0.1μF
Rx2[P,N]
0.1μF
Rx3[P,N]
0.1μF
Rx4[P,N]
1.2V
10nF
4 12
100pF
LOS CP EP VDD
OUT1[P,N]
0.1μF
IN1[P,N]
OUT2[P,N]
0.1μF
IN2[P,N]
QLx411GRx
OUT3[P,N]
0.1μF
IN3[P,N]
OUT4[P,N]
0.1μF
IN4[P,N]
1.2V
DT
Active Copper Cable Assembly
8-Pair Differential 100Ω
Twin-Axial Cable
≤ 10m 28AWG
1.2V
10nF
100pF
12 4
VDD EP CP LOS
0.1μF
IN1[P,N]
OUT1[P,N]
0.1μF
IN2[P,N]
OUT2[P,N]
Host Channel
Adapter
0.1μF
Rx1[P,N]
0.1μF
Rx2[P,N]
QLx411GRx
0.1μF
IN3[P,N]
OUT3[P,N]
0.1μF
IN4[P,N]
1.2V
DT
OUT4[P,N]
0.1μF
Rx3[P,N]
0.1μF
Rx4[P,N]
Tx1[P,N]
Tx2[P,N]
Tx3[P,N]
Tx4[P,N]
Fabric Switch
Connector Paddle Card
Connector Paddle Card
November 19, 2009
FN6989.1
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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