TRANSPORT PRODUCTS
VSC8228
Dual Channel Multirate Signal Conditioner and Retimer
BENEFITS:
4Provides
Fibre Channel and Gigabit Ethernet Signal Conditioning, Improving
the Signal Integrity
4Offers
flexible implementation. FibreTimer in Retimer Mode Minimizes the
Jitter Generation, While Maintaining High Jitter Tolerance. In Repeater
Mode Offers Low Latency Signal Cleanup. Bypass Mode Allows Support
for Rates in not Directly by the CDR.
4Supports
Exteneded Trace Lengths Over Copper Backplanes and Cables,
Ideal for Backplane and Rack-to-rack Applications
4Supports
enhanced receiver diagnostic capabilities.
F E AT U R E S :
4Provides
SerDes to SGMII Gigabit Ethernet interface conversion.
4Dual
Clock and Data Recovery Architecture for Gigabit
Ethernet and Fibre Channel Applications
4FibreTimer™
Configurable Clock Recovery Unit (CRU):
Repeater, Retimer, or Bypassed
BLOCK DIAGRAM:
4Programmable
Input Signal Equalization, Output
De-emphasis, and Output Drive Levels
4Analog
Signal Detect and Protocol Monitor Indicators
4Optional
Half-rate SGMII Clock and Repeated Reference
Clock Output
4Built
In Self Test Which can Generate and Detect an
Unframed 2^7, 2^23, and 2^31 Pseudorandom Bit
Stream (PRBS), a User Defined Pattern, and the Fibre
Channel CRPAT, CJTPAT, and CSPAT Patterns
PIO0, M0, MOSI, SDA
PIO1, M1, SCK
PIO2, RESET, MISO
PIO3, SSN
PIO4
PIO5, M2
PIO6, M3
Serial Interface
and
Control Logic
RXCLKP
RXCLKN
REFCLK
4Enables
Comprehensive System Diagnostic Capabilities. The Extended
Pattern Support Reduces the Need for External test Equipment
VSC8228
RXINP
RXINN
CDR
with
Retimer
RXOUTP
RXOUTN
A P P L I C AT I O N S :
RXEMP
4Fibre
Channel Switches, Disk Arrays, RAID Subsystems,
Host Bus Adapters
4Gigabit
Ethernet Line Cards
4Blade
Server Backplanes
RXASD
RXSDU
EXOEN
LOS and
Protocol Error
Logic
RXRATE0
RXRATE1
RXRP
APPSEL
CDR
with
Retimer
TXINP
TXINN
S P E C I F I C AT I O N S :
4Single
1.2 V and/or 1.8 V Supply
410mm
x 10mm 64-pin TQFP Package
4SPI
or Two-wire Serial Interface
4Typical
Power: 360 mW
TXOUTP
TXOUTN
RXASD
RXSDU
TXRATE0
TXRATE1
TXRP
LOS and
Protocol Error
Logic
TXASD
TXSDU
PB-VSC8228-001
VSC8228
Dual Channel Multirate Signal Conditioner and Retimer
GENERAL DESCRIPTION:
The VSC8228 is a dual repeater/retimer for
Fibre Channel, Gigabit Ethernet, SONET/SDH,
and Infiniband applications. The VSC8228
contains dual FibreTimerTM clock recovery
units (CRU) for bidirectional signal conditioning in system
interconnect and serial backplane applications. The device
supports rates from 125 Mbps up to 4.25 Gbps. Using a single
reference clock for acquisition, the VSC8228 retransmits the
incoming serial data synchronously to the reference clock in
retimer mode or to the incoming data in repeater mode. In the
retimer mode, add/drop elasticity buffers insert/delete Fibre
Channel fill words to account for timing differences in the
incoming data and local reference clock.
An analog signal detect function is integrated into both
channels. In the retimer mode, the device monitors the
incoming data for run-length violations and K28.5- symbols.
The inputs on both the transmit and receive channels can be
looped back to the outputs of the opposite channels for
diagnostic purposes. The device provides a built-in pattern
A P P L I C AT I O N D I A G R A M :
The device may be powered from a single 1.2 V supply, single
1.8 V supply, or both a 1.2 V and 1.8 V supply. The 1.8 V supply
is required to meet the LVPECL output swing levels. The device
has current-mode logic (CML) inputs and outputs that can be
AC-coupled for LVPECL and LVDS compatibility. The IC is
packaged in a compact 10mm x 10mm, 64-pin TQFP package.
Typical power dissipation for a 1.2 V supply is 360 mW.
A high degree of signal integrity is maintained via differential
I/O, on-chip input and output terminations, input equalization,
and output de-emphasis. The programmable input equalization
circuit compensates for the frequency limitations of long
printed circuit board (PCB) traces, backplanes, connectors,
and cables. Equalization, de-emphasis, output drive levels,
data rate, and other features are configured through industry
standard serial interfaces (Two-wire or SPI).
generator and checker. An optional half-rate clock for SGMII
applications is provided on the receive channel output.
Optical
Module
VSC8228
Line Card
Switch
ASIC
Backplane
Switch Fabric
For more information on Vitesse Products visit the Vitesse web site
at www.vitesse.com or contact Vitesse Sales at (800) VITESSE
or sales@vitesse.com
©2005 Vitesse Semiconductor Corporation
Vitesse, ASIC-Friendly, FibreTimer, TimeStream and Snoop Loop are trademarks of Vitesse Semiconductor Corporation.
All other trademarks or registered trademarks mentioned herein are the property of their respective holders. Vitesse
Semiconductor Corporation ("Vitesse") retains the right to make changes to its products or specifications to improve
performance, reliability or manufacturability. All information in this document, including descriptions of features,
functions, performance, technical specifications and availability, is subject to change without notice at any time.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
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