B E N E F I T S :
Allows the User to Optimize the Bandwidth of the Limiting Amplifier and TIA for a
Given Data Rate, Improving the Optical Input Sensitivity at Lower Data Rates, and
Provides Superior Interoperability with Legacy Optical Devices
Automatically Adjust Bias Current, Ensuring a Constant Average Optical Power on
Temperature and Time
Adjustable Negative Peaking Control to Improve VCSEL Edge Speed
Enables the Micro-controller to Directly Read and Write the the VSC7964 Registers,
Allowing for Expanded Device Control and Enhanced Fault Coverage
Eliminates the Need for External Components Saving Board Space and Simflifying
the Layous
Enables the Customer to Meet the International Electrotechnical Commission (IEC)
Safety of Optical Fibre Communication Systems Eye Safety Epecifications.
Support Industrial Temperature Applications
F E A T U R E S :
Rate Selection
Optical Power Monitor
Dynamic Negative Peaking Control
Digital Programming Interface
Integrated Digital to Analog Converters (DACs) and Temp Sensor
Built-in Support for IEC-60825 Eye Safety
Extended Operating Temperature
A P P L I C A T I O N S :
Gigabit Ethernet Transceivers
Fibre Channel Transceivers (1x, 2x and 4x)
Infiniband Transceivers
1/2/4 Gbps Integrated VCSEL Driver and Limiting Amplifier
TRANSPORT PRODUCTS
PB-VSC7964-001
VSC7964
VCSEL
VSC7977
Receiver
VSC7964
Limiting
Amplifier
and
VCSEL
Driver
Micro
Controller
Two-wire
interface
Controls/Faults
Tx
Rx
A P P L I C A T I O N D I A G R A M :
S P E C I F I C A T I O N S :
Supported Data Rates: 1Gbps to 4.25Gbps
Transmitter and Receiver Rise/Fall Time: 40ps
Modulation Current: 2mA to 15mA
Supply Voltage: 3.3V
Operating Temperature Range from -40C to 100C (Case)
SFP/SFF-8472 Compliant Disable and Faults
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
1/2/4 Gbps Integrated VCSEL Driver and Limiting Amplifier
VSC7964
The VSC7964 is a multirate 4.25 Gbps integrated
Vertical Cavity Surface Emitting Laser (VCSEL)
driver and limiting amplifier for Gigabit
Ethernet and Fibre Channel applications
optimized to reduce SFP module cost. A
standard SPI port is provided for programming integrated
digital-to-analog converters for laser bias current, modulation
current, power, modulation peaking current, and the limiting
amplifier loss of signal threshold. The VSC7964 is equipped
B L O C K D I A G R A M S :
G E N E R A L D E S C R I P T I O N :
with SFP-compliant fault indicators, redundant disable control,
Automatic Power Control, temperature sensor, voltage reference,
various signal monitors, and robust eye safety features. A single
bidirectional pin between the VSC7964 and the VSC7977
transimpedance amplifier programs the receiver bandwidth and
monitors the received optical power. This allows the VSC7964 to
provide an accurate indicator of received power and to select the
TIA bandwidth without increasing TO-CAN pin count. The VSC7964
is available in a 6mm x 6mm 40-pin QFP-N plastic package.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
PDF 
ZIP