VSC3303
PRODUCT BRIEF
8.5 Gbps 4 × 4 Crosspoint Switch
BLOCK DIAGRAM:
Switch Core
Inputs [3:0]
EQ
EQ
Outputs [3:0]
VSC3303
Programming Interface
Features
Benefits
8.5 Gbps non-return-to-zero (NRZ) data bandwidth
Transparent support for virtually all data rates and protocols
Fully non-blocking and multicasting switch core with per-pin
signal inversion capability
Allows complete flexibility in routing and distributing signals
Multiple time-constant programmable input and output
equalization
Compensates for multiple impairments in a signal path
Wide equalization adjustment range
Supports all types of interconnect media such as PCB,
backplanes, and cable
Fully asynchronous operation with <1 ns latency
No adjustments based on data rate or reference clock required
LOS detection and forwarding
OOB forwardng for protocols such as SAS and SATA
Small 7 mm × 7 mm BGA package with 1.0 mm pin pitch
Convenient size and pin spacing for signal routing flexibility
Applications
• Wideband signal switching and clean-up
• Line driver or receiver
• Backplane signal fanout, driver, or receiver
• Copper cable
• PCB signal enhancement
• High-speed signal conditioner
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VSC3303
General Description
The VSC3303 is a 4-port 8.5 Gbps asynchronous switch
with advanced signal equalization designed for high-speed
serial backplanes and cable interconnect applications.
VSC3303 switches have multicast and loopback capability
for great flexibility in allocating and routing signals in a
broad range of applications. The VSC3303 includes dual
time-constant equalization, significantly reducing jitter
associated with driving multigigabit signals across
backplanes and cables.
Using a fully asynchronous architecture supports any data
rate or protocol on any channel without the need for an
external reference clock. This gives the VSC3303 wire-like
interoperability in virtually any application that uses binary
signaling.
The VSC3303 can also be used as a buffer that simplifies
and enhances the design of high-speed signal paths by
providing signal equalization at both inputs and outputs to
reduce or reverse signal degradation due to transmission
line effects.
Featuring programmable input signal equalization and
output pre-emphasis, each with multiple time constants, the
VSC3303 is also ideal for countering signal degradation
over a wide variety of transmission media types and
lengths.
Typical power consumption for the device is 200 mW per
active channel, and unused channels can be de-activated
to save the power associated with those ports. The output
drivers for the VSC3303 also feature a wide supply voltage
range from 1.8 V to 3.3 V for flexibility in matching the
output swing to the application requirements.
The VSC3303 has a loss of signal (LOS) detector with
programmable thresholds on every input port. LOS
forwarding can be enabled for each of the outputs, which
will cause the outputs to be squelched in response to a
LOS detect at the corresponding input, thereby propagating
signal envelopes through the switch.
VSC3303 programming is through a standard two-wire
serial interface. The interface address can be hardwired
through static pins or through a proprietary two-pin
interface that allows for address assignment after
power-up.
Specifications
• 8.5 Gbps NRZ per-channel data rate
• 2.5 V core; 1.8 V, 2.5 V, and 3.3 V high-speed I/O
Related Vitesse Products
Visit www.vitesse.com for information about these related
Vitesse products:
• VSC3303: 8.5 Gbps 4 × 4 Crosspoint Switch
• VSC8238-03: 8.5 Gbps Transceiver with Equalization
and Clock and Data Recovery
• VSC7344-01: 24-Port Ethernet MAC
Backplane Application
Central Switch
ASIC/
FPGA
4
4
VSC3303
VSC3144-08
ASIC/
FPGA
4
4
VSC3303
Backplane
© 2009 by Vitesse Semiconductor Corporation. VPPD-02410 Revision 1.0. Vitesse Semiconductor Corporation ("Vitesse") retains the right to make changes to its products or specifications. As such, all information in this document, including descriptions of features, functions, performance, technical specifications and availability, is subject to change without
notice at any time, and Vitesse assumes no responsibility for use of any information herein. Nothing contained herein conveys to the purchaser of microelectronic devices any
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use of Vitesse products does not ensure compliance to IEC 60825. Buyers are responsible for ensuring compliance to IEC 60825. Buyers must fully indemnify Vitesse for any damages resulting from non-compliance to IEC 60825.