VSC8479 查看數據表（PDF） - Vitesse Semiconductor
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VSC8479 Datasheet PDF : 2 Pages
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VSC8479
9.95 Gbps to 11.3 Gbps 16-bit Transceiver
GENERAL DESCRIPTION:
The VSC8479 is a 1:16, 16:1 transceiver with
integrated Clock and Data Recovery unit
(CDR) and Clock Multiplier Unit (CMU) that
provides the most comprehensive solution
available in the industry. Continuous
frequency of operation spans from 9.953
Gbps to 11.3 Gbps over full temperature range.
Targeted for XFP Host ASIC SERDES, 300 pin module and
DWDM line card applications, the VSC8479 provides
industry leading optimization of power, performance,
programmability, price and feature integration. The 1.15 W
total power dissipation enables 300 pin MSA module
vendors to provide performance and functionality
advantages while dropping the overall power dissipation of
their existing modules. The VSC8479 is a perfect choice for
XFP motherboards with proven inter-operability with all
major XFP module vendors.
The receiver path has a high sensitivity receiver with a
programmable VGA and input bandwidth equalization (EQ)
to provide stressed input data eye compensation. No
external post amplifier is required for most applications.
The high-speed output is swing and pre-emphasis
programmable to support a variety laser driver and XFI host
ASIC applications.
The VSC8479 fully supports all features, functions and
clock modes required for 300-pin multi-source agreement
(MSA) transponder module full compliance. All loopback
modes are supported with multiple line timing clock modes.
A highly flexible reference clock source selection and
reference clock clean-up support scheme is provided to
minimize external circuitry. A selectable two-wire serial or
Serial Peripheral Interface (SPI) provides full micro-
controller access to all status and control registers,
including software read-back capability of all external
control input pins. Any combination of discrete pins and
serial register status and control can be employed. A highly
flexible PRBS and user defined pattern checker and error
count provides system analysis and built-in self-testing.
Robust cross talk immunity enables the VSC8479 to operate
the Tx and Rx paths asynchronously to each other while
exceeding SONET level jitter generation and jitter tolerance
performance. A high-speed output clock can be optionally
enabled for higher performance applications. An adjustable
loss of signal (LOS) indicator is integrated into the device
enabling optical modulation amplitude monitoring.
The power supply scheme provides a high degree of
flexibility. The device can operate on a single +1.8V supply
with an optional +3.3V I/O supply for 3.3V compliant
interfacing. The Tx path and Rx path can be powered down
independently. The single chip, small footprint (17 x 17 mm)
allows for both cost reduction and board size reduction for
price and size aggressive, small form factor module
applications. All VSC8479 devices are tested at high-speed
to insure the highest performance and quality standards
you’ve come to expect from Vitesse.
VSC8479 BLOCK DIAGRAM:
TXPCLK with Phase Adjust
TXMCLK
High-Speed Clock*
High-Speed Data
16:1
MUX
FIFO 16
x 16
SFI-4
Phase 1/
XSBI
FIFO Alarm
TXPICLK
16Low-Speed Data
Tx Ref Clock
Rx Ref Clock
Ex Ref Clock
Reference Clk
Distribution and
Clean Up
Support
Loopback
and
BIST
CMU
Line Loopback
Diagnostic Loopback
Adjustable LOS
High-Speed Data
Control/Status Signals
Mute Controls
Invert Controls
LOL Alarms
External Pin Read Back
CDR
EQ
VGA
1:16
DEMUX
I2C / SPI
Interface
Two-wire Interface / SPI Port
SFI-4
Phase 1/
XSBI
RXMCLK
RXPOCLK
16Low-Speed Data
* With Enable/Disable
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
©2004 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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