TRANSPORT PRODUCTS
VSC7966
155 Mbps to 1.25 Gbps Laser Driver and Post Amplifier
F E AT U R E S :
4Integrated
Laser Driver and Limiting Amplifier
4Digital
Control Interface
4Selectable
Resistance on Monitor Diode Input
4Laser
Driver Crossing Point Control
4Built-in
Eye Safety Support
BENEFITS:
4Reduces
Board Space and Simplifies the Design
4Provides
Advance System Diagnostics, Enabling Full Support of SFF-8472
4Improves
Accuracy of the Monitor Diode Input by Allowing the User to
Select the Resistance and Capacitance in the Input
4Enables
the User to Adjust the Level of the Crossing Point on the Laser
Driver Output
4No
External Components are Required to Meet IEC-60825 Eye Safety
Specifications
S P E C I F I C AT I O N S :
4Package
Size: 5 mm × 5 mm QFP-N
4Maximum
Modulation = 80 mA
4Typical
Core Power = 330 mW
BLOCK DIAGRAM:
SFP/SFF Module
VSC7964/5/6
MON_SEL
VSC797x-WD
ROSA
Limiting Amplifier
Laser Driver
SFP/SFF
MSA
Connector
Fault and
Control Logic
Analog MUX
TOSA
SPI
ADC
Microcontroller
PB-VSC7966-001
VSC7966
155 Mbps to 1.25 Gbps Laser Driver and Post Amplifier
GENERAL DESCRIPTION:
The VSC7966 device is a multirate 1.25 Gbps
integrated laser driver and limiting amplifier for
SONET/SDH, Fast Ethernet, and Gigabit Ethernet
applications optimized to reduce module cost. The
device is intended to drive distributed feedback
(DFB) and Fabry Perot (FP) lasers. A standard SPI
port is provided for programming integrated digital to analog converters
for laser bias current, modulation current, average power, and the
limiting amplifier loss of signal threshold. The VSC7966 device is
equipped with SFP-compliant fault indicators, redundant disable control,
Automatic Power Control, temperature sensor, various signal monitors,
and robust eye safety features. The VSC7966 device is available in a 5
mm x 5 mm 32-pin QFP-N plastic package.
Trademarks ™
Vitesse, ASIC-Friendly, FibreTimer, TimeStream, Snoop Loop, Super FEC, FOCUSConnect, Meigs-II, Meigs-IIe, Lansing, Campbell-I, Barrington, PaceMaker, HOVCAT48,
HOVCAT48e, HOVCAT192, HOVCAT192e, Micro PHY, FOCUS32, FOCUS16, IQ2200, VersaCAT, GigaStream, HawX, SparX, StaX, VstaX, SimpliPHY,VeriPHY, ActiPHY, XFP PRO, SFP
PRO, Smart-LINKOctalMAC, EQ Technology are trademarks in the United States and/or other jurisdictions of Vitesse Semiconductor Corporation. All other trademarks or
registered trademarks mentioned herein are the property of their respective holders.
Copyright ©
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. While the information furnished herein is held to be accurate and reliable, no responsibility will be assumed by Vitesse for its use. Furthermore, the information contained
herein does not convey to the purchaser of microelectronic devices any license under the patent right of any manufacturer.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
sales@vitesse.com
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