VSC7981 Ver la hoja de datos (PDF) - Vitesse Semiconductor
Número de pieza
componentes Descripción
Fabricante
VSC7981 Datasheet PDF : 2 Pages
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VSC7980, 7981, 7982
Up to 11.3 Gb/s 3.3V: VCSEL, DML, EML Laser/Modulator Driver Family
GENERAL DESCRIPTION:
The VSC7980, VSC7981 and VSC7982 are
low power 10Gb/s laser and modulator
drivers for both Telecommunications and
Data Communications. Applications include
modules and line cards for OC-192/STM-64
SONET/SDH as well as 10GE/10GFC
protocols. The VSC7980 is intended to drive Vertical Cavity
Surface Emitting Lasers (VCSEL). The VSC7981 is intended to
drive Direct Modulated Lasers (DML) such as Distributed
Feedback (DFB) and Fabry-Perot (FP) Lasers with a 25 Ohm
characteristic impedance. The VSC7982 is intended to drive DML
and Externally Modulated Lasers (EML) such as Electro
Absorption modulators with a 50 Ohm characteristic impedance.
The 50 Ohm on-chip back-termination simplifies the process of
matching the laser to the driver. The VSC7980, VSC7981 and
VSC7982 are equipped with XFP-compliant fault indicators
(FLTN_DISN and EOLN), dual disable control (FLTN_DISN and
TX_DIS), Automatic Power Control (APC), temperature sensor,
voltage reference, various eye safety features and Extinction
Ratio Control (ERC) with an external micro controller. These
device controls and monitors were designed to be controlled
with set resistors, potentiometers, or Digital-to-Analog
Converters (DACs) and monitored with Analog-to-Digital
Converters (ADCs) for ultimate flexibility in module design. The
VSC7980, VSC7981 and VSC7982 are available in a 5mm x 5mm
32-pin plastic QFP-N package.
BLOCK DIAGRAMS:
Configuration with a Common Cathode Laser
BSRC
IOB
DATA
DATAN
C TERM
VCC
SRC_SNKN
LCLRN
EOLN
TX_DIS
FLTN_DISN
V CC= +3.3V
VCC= +3.3V
IOM
OUT CD
OUTN
25
I MOD
VCC = +3.3V
BSNK GND
MD
Modulation and Bias Control and Montoring
VTEMP
MODMON
MODSET BIASMAX
CPSET
APCSET
BIASMON
APCREF
VREF
DFB TOSA
17
Configuration with a Common Anode Laser
BSRC +3.3V
VCC = +3.3V
V CC= +3.3V
+3.3V
DFB TOSA
IOM
OUT C D
OUTN
17
DATA
DATAN
C TERM
SRC_SNKN
LCLRN
EOLN
TX_DIS
FLTN_DISN
25
IMOD
VCC = +3.3V
BSNK
IOB
MD
Modulation and Bias Control and Montoring
VTEMP
MODMON
BIASMON
APCREF
MODSET BIASMAX CPSET APCSET VREF
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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