BACKPLANE PRODUCTS
VSC7281
Dual XAUI – Single XGMII Quad 0.95 Gbps to 3.25 Gbps Transceiver
F E AT U R E S :
IEEE802.3ae 10 Gigabit Ethernet Compliant
ANSI 10Gb Fibre Channel Compliant
Dual XAUI Serial Bus
Single XGMII Parallel Bus
0.95 Gbps to 3.25 Gbps Quad SerDes/Transceiver
XAUI Compliant Retimer and Repeater Modes
Simultaneous Operation at Multiple Frequencies
A P P L I C AT I O N S :
10 Gigabit Ethernet and Fibre Channel Links
- XENPAK, X2, XPAK Module Connections
High Speed Serial Backplanes
- XAUI Channel
- Independent Channel Control
Box-to-Box Serial Communications
- Copper, Coax, and Fiber
Programmable Pre-Emphasis and Signal Equalization
8B/10B Encoder/Decoder with Optional Bypass
Programmable Rate Matching Characters
Elastic Buffer for Intra/Inter-Chip Deskewing and Channel-to-
Channel Alignment
Received Data Aligned to Local REFCLK or to Recovered Clock
TX and RX Rate Matching for FC, 1GbE, and InfiniBand™
S P E C I F I C AT I O N S :
Packaged in a 324-pin, 19mm x 19mm TEPBGA
Input Termination, Internal 100Ω Differential
Input Signal Detection and Signal Equalization
Multiple Internal Clocking Modes
Output Reduced Swing Level for Optics
Serial and Parallel Loopback
Fast Locking CRU
Flexible CMU Operation
IEEE802.3 MDIO Register Interface
Multiple Built-In-Self Test Diagnostics and Counters
- PRBS, CRPAT, CJPAT Pattern Generation
XAUI-A
Parallel
Port
XGMII
Encode/
Decode
4x4
MUX
XAUI-B
CMU
MDIO
DIAG
Serial
Port A
Serial
Port B
BLOCK DIAGRAM:
JTAG Boundary Scan
HSTL1.5 and HSTL1.8 Parallel I/O
Enterprise
Access
Metro
Core
PB-VSC7281-001
VSC7281
Dual XAUI – Single XGMII Quad 0.95 Gbps to 3.25 Gbps Transceiver
GENERAL DESCRIPTION:
The VSC7281 is a Dual XAUI – Single
XGMII Transceiver tailored for 10 Gigabit
Ethernet (10GbE) and 10 Gigabit Fibre
Channel (10GFC) applications. The feature
set and flexibility of these devices make
them perfectly suited for Backplane and
other Serial Interconnect applications such as Serial Rapid
I/O, PCI Express and XAUI.
With four channels of serial transmitter/receiver pairs, these
transceivers can deliver a duplex data rate of greater than 20
Gbps. These serial channels can be configured for independent
operation, or as fully 10GbE/10GFC compliant XAUI (10 Gigabit
Attachment Unit Interface) serial buses. The parallel bus is fully
XGMII (10 Gigabit Media Independent Interface) compliant. When
independent channel operation is required, the parallel bus can
be configured for either 8- or 10-bit operation with the ability to
enable or bypass the internal 8B/10B encoders/decoders.
No additional external logic is required for the basic operation of
this device. However, for flexibility and systems adaptability, an
MDIO (Management Data Input/Output) interface is provided for
internal register access. These registers are MDIO compliant and
allow for monitoring and configuration of special modes for
diagnostics, BIST (Built-In-Self Test), and various control of
special channel features, such as pre-emphasis, cable
equalization, reduced output swing, loopback, signal detection
and XAUI port selection.
The flexibility of this device is not only seen in the MDIO register
programmable feature set, but also in a wide range of supported
frequencies. With a serial data rate that can range from 0.95
Gbps to 3.25 Gbps, this device supports multiple communication
applications such as Fibre Channel, InfiniBand, and Ethernet. The
VSC7281 has the functionality to support these common rates
simultaneous with a single external reference clock.
Whether the application is a high-speed backplane, chassis-to-
chassis communication or an optical link, these devices can
provide the flexibility and reliability required in today’s high-end
Data Communication systems.
M O D E S O F O P E R AT I O N :
The VSC7281 allow for flexibility in multiple systems
environments.
XAUI-A
XGMII
XAUI-B
XAUI
Retimer
XAUI-B
• XAUI Loop-Through
- XAUI Retimer/Switch
- XGMII Bypass
- Supervisor
• High Speed Signal Clean-up
XAUI-A
XGMII
• Single Port XGMII-Dual XAUI
- Supervisor and Redundant XAUI
- Link Ready State Diagnostics
A P P L I C AT I O N S :
10 Gigabit Ethernet Port Application
• Driving out-of-box optics or backplane
XAUI-A
XENPAK
Optical Module
Backplane
Backplane
Interconnect
Interconnect
10GE MAC(s),
10GE Switch,
and/or
Switch Fabric(s)
XGMII
VSC7281
SerDes
Transceiver
XAUI-B
2GFC and 1GFC Simultaneous Operation
2x2.125 Gbps
2x1.06 Gbps
2-lane FC
2-lane FC
2x2.125G
2x1.06G
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
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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