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| TRANSPORT PRODUCTS VSC7980, 7981, 7982 Up to 11.3 Gb/s 3.3V: VCSEL, DML, EML Laser/Modulator Driver Family BENEFITS: On Chip Op-amps Provide Stability and Control Resulting in Reduced Component Count Small 5mm x 5mm Low-cost QFP-N Packaging Optimized for Small Footprint Applications, Including XFP Modules. A P P L I C AT I O N S : SONET OC-192 and SDH STM-64 Transmission Systems GR-253: SR, IR and LR 10 Gigabit Ethernet and 10 Gigabit Fibre Channel IEEE802.3ae 10GBASE-SR,LR,ER XFP MSA Transceiver Modules XENPAK, XPAK, X2 and 300-pin MSA Transponder Modules Supports Both APC and ERC Control Loops for Leading Edge Designs On Chip Sourcing and Sinking Bias Current Outputs for IEC-60825 Eye Safety, Reducing Both Circuit and Firmware Design Complexity S P E C I F I C AT I O N S : DATA Rate up to 11.3 Gb/s Single-Ended Input Voltage Sensitivity: 300mV Differential Input Voltage Sensitivity: 300mV (150mV per side) Output Modulation Voltage Compliance 1.5 V Minimum Output Modulation Current - VSC7980 - 1 mA - VSC7981 - 20 mA - VSC7982 - 20 mA or 1V Maximum Output Modulation Current - VSC7980 - 15 mA - VSC7981 - 80 mA - VSC7982 - 2.5V or 50 mA, VCC2 = 3.3V - VSC7982 - 3V or 60 mA, VCC2 = 5V Power Supply Voltage +3.3 V Minimum Ambient Temperature -40 C Case Temperature -20 to +100 C F E AT U R E S : +3.3V Power Supply for Low Power Duty Cycle, Output Modulation and Output Bias Level Controls VSC7980: 200mW Typical Power Dissipation Including 50 Load VSC7981: 800mW Typical Power Dissipation Including 25 Load VSC7982: 930mW Typical Power Dissipation Including 50 Load Sourcing and Sinking Bias Current Outputs 50ohm Back-terminated AC-coupled Outputs Automatic Power Control Support for Extinction Ratio Control XFP-Compliant Current Disable and Faults Built-in support for IEC-60825 Eye Safety Small package: 5mm x 5mm 32 pin QFP-N PB-VSC7980,81,82-001 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 Configuration with a Common Anode Laser BSRC +3.3V +3.3V LB V CC = +3.3V VCC = +3.3V LP1 DFB TOSA V CC = +3.3V VCC = +3.3V LP1 DFB TOSA IOM OUT OUTN LP2 DATA DATAN C TERM VCC SRC_SNKN LCLRN Modulation and Bias Control and Montoring EOLN TX_DIS FLTN_DISN MODSET BIASMAX CPSET APCSET VREF VTEMP MODMON BIASMON APCREF CD 17 DATA DATAN C TERM IOM OUT OUTN CD 17 LP2 LB 25 V CC = +3.3V I MOD BSNK MD GND 25 VCC = +3.3V IMOD BSNK MD IOB SRC_SNKN LCLRN Modulation and Bias Control and Montoring EOLN TX_DIS FLTN_DISN MODSET BIASMAX CPSET APCSET VREF VTEMP MODMON BIASMON APCREF 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 (c)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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