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| TRANSPORT PHYSICAL LAYER VSC7967 PON Integrated 155 Mbps to 2.5 Gbps Burst-mode Laser Driver and Limiting Amplifier A P P L I C AT I O N S : BPON, GE-PON, and GPON burst-mode laser driver S P E C I F I C AT I O N S : Package size: 5 mm x 5 mm QFN VSC7967 Maximum modulation = 80 mA Typical core power = 330 mW Operating temperature range = -40 C to 100 C F E AT U R E S : APC loop requires no initialization phase VSC7967 meets the specification for BPON, GE-PON, and GPON BENEFITS: Laser driver is ready to transmit upon power up Allows the VSC7967 to be used in both PON and SFP module solutions Allows PON module to interoperate with multiple upstream devices Improves accuracy of the monitor diode input by allowing the user to select the resistance and capacitance in the input Enables the user to adjust the level of the crossing point on the laser driver output No external components are required to meet IEC-60825 eye safety specifications Burst enable input supports LVPECL, LVDS, and LVTTL output levels Selectable resistance on monitor diode input Laser driver crossing point control Built-in eye safety support A P P L I C AT I O N D I A G R A M : GPON ONU Module VSC7967 MON_SEL Triplexor VSC7970 at 1490 nm Laser at 1310 nm Analog Video Receive at 1555 nm Downstream Video at 1555 nm Downstream Receive Data at 1490 nm Upstream Data at 1310 nm Limiting Amplifier Burst-mode Laser Driver Fault and Control Logic Connector Analog MUX SPI ADC Microcontroller CATV Receive Video Amplifier VPPD-01356 Revision 1.0 VSC7967 PON Integrated Burst-mode Laser Driver and Limiting Amplifier GENERAL DESCRIPTION: The VSC7967 is a multirate 1.25 Gbps integrated laser driver and 2.5 Gbps limiting amplifier for Passive Optical Network applications optimized VSC7967 modulation current, average power, and the limiting amplifier loss of signal threshold. The VSC7967 is equipped with SFP-compliant fault indicators, redundant disable control, Automatic Power Control, temperature sensor, various signal monitors, and robust eye safety features. The VSC7967 is available in a 5mm x 5mm 32-pin QFN plastic package. 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, BLOCK DIAGRAMS: Laser Driver BSRC = VCC VCC 15 15 IMOD OUT OUTN 5 15 5 VCC DATA DATAN IMOD BSNK BSNKN BEN MD TX_FAULT AOUT IBIAS IMD VCC 10 k 10 k Modulation and Bias Control and Montoring BENN_TX_DIS Limiting Amplifier DCRST[1:0] DCRST1 RPK_STAGE Peak Detector and Control DCRST[1:0] DCRST2 LIN 100 VCC LA_SQSRC LA_SQFORCE Output Control 7 k LOSMON LOS LA_SQMON 50 50 LOUT S1 S2 S3 S4 S5 LOUTN Trademarks TM 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, NexSAS, VersaCAT, GigaStream, HawX, SparX, StaX, VstaX, SimpliPHY,VeriPHY, ActiPHY, XFP PRO, SFP PRO, Smart-LINK, OctalMAC, 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 (c) 2006 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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