1 of 3GX4002 2x2 14.025Gb/s Crosspoint Switch
Product Brief
56217 - B December 2010
GX4002 2x2 14.025Gb/s Crosspoint Switch with Trace Equalization and Output
De-Emphasis
www.gennum.com
Key Features
• 2 x 2 crosspoint switch architecture
• Integrated CDR with 9.95 to 11.3Gb/s and 14.025Gb/s
reference-free operation
• Automatic rate detect
• Sophisticated dynamic on-chip power management
control
• Multiple user-programmable power-down saving
modes
• Independent programmable input trace equalization to
reduce deterministic jitter (ISI)
• Independent programmable output pre-emphasis for
driving long board traces
• Digital control through I
2
C interface
• Integrated analog-to-digital converter, which provides
access to digital diagnostic information on supply
voltage and die temperature
• Integrated eye monitor and PRBS7 generator/checker
• Polarity invert, output mute functions available
• Single 3.3V supply (±5%)
• On-chip I/O termination
• Low power consumption: 600mW typical
Low power option for 4.25 & 8.5Gb/s operation:
360mW typical
• 5mm x 5mm 32-pin QFN package
• -40°C to +100°C case operation
• RoHS compliant
Applications
• Enterprise and carrier applications
• 10GbE, Fibre Channel and InfiniBand networks
•Redundancy switching
• Retimer for 10Gb/s and 14Gb/s backplane and
linecards
Description
The GX4002 is a low-power, high-speed 2 x 2 crosspoint
switch, with robust signal conditioning circuits for driving
and receiving high-speed signals through backplanes.
The device consumes as low as 600mW of power (typical)
with all channels operational. Unused portions of the chip
can be turned off in order to further reduce power
consumption.
The signal conditioning features of the GX4002 include
per-input clock and data recovery (CDR), programmable
equalization and per-output programmable de-emphasis.
The input equalizer removes ISI jitter—typically caused by
PCB trace losses—by opening the input data eye in
applications where long PCB traces are used. The
integrated CDR “resets” the jitter budget, effectively
erasing the signal distortion that can occur during
transmission.
Output pre-emphasis capability provides a boost of the
high-frequency content of the output signal, such that the
data eye remains open after passing through a long
interconnect of PCB traces and connectors.
The GX4002 features an integrated analog-to-digital
converter, which, through the serial interface, provides
digital diagnostic information about supply voltage and die
temperature.
The GX4002 device is packaged in a small-outline 5mm ×
5mm 32-pin, high-frequency QFN package with exposed
pad.
The GX4002 is Pb-free, and the encapsulation compound
does not contain halogenated flame retardant. This
component and all homogeneous sub components are
RoHS-compliant.
