模拟开关多路复用SFP模块

摘要：为了避免多个I²C总线的主人，在电信或数据通信系统与SFP模块，添加一个模拟多路复用器（MAX4572），指示相应的SFP模块的数据线。

Maxim>AppNotes>CommunicationscircuitsKeywords:analogswitches,I2Cbus,MDIOinterface,SFPmodulesDec23,2010APPLICATIONNOTE4552AnalogSwitchMultiplexesSFPModulesBy:KevinBilkeNancyXiongAbstract:ToavoidmultipleICbusmastersinatelecomordata-communicationssystemwithSFPmodules,addananalogmultiplexer(MAX4572)thatdirectsthedatalinetotheappropriateSFPmodule.AsimilarversionofthisarticleappearedintheAugust2,2007issueofElectronicDesignmagazine.Small-form-factorpluggablemodules(SFPmodules)areincommonuseforthephysical-layerinterfaceintelecomanddata-communicationsequipment.AlsocommoninthesesystemsisanICbusfortheMDIOinterface(ManagementDat