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1、CypressCY2941X可编PLL晶振15MHz・2・1GHz解决方案时间：2016-10-1409:45:05来源:中电网Cypress公司的CY2941x/CY2942x系列是可编基于PLL的晶体振荡器解决方案，具有灵活的输出频率从15MHz到2.1GHz和极好的抖动性能，工作电压1.8V-3.3V注要用在通信应用如OTN.SONET/SDH,xDSL,GbE,网络，无线基础设备以及测试和仪器仪表于高速数据转换器•本文介绍了CY2941x/CY2942x系列主要特性，逻辑框图，以及评佔板CY3676框图，电路图和材料清单.TheCY2941x/CY
2、2942xisaprogrammablePLL-basedcrystaloscillatorsolutionwithflexibleoutputfrequencyoptions・Itisfieldorfactory-programmableforanyoutputfrequencybetween15MHzand2.1GHz.OtherfrequencyoptionscanbeconfiguredwiththeI2Cinterface.Usingadvaneeddesigntechnology,itprovidesexcellentjitterperform
3、sneeacrosstheentireoutputfrequencyrange,workingreliablyatsupplyvoltagesfrom1.8Vto3.3Vforambienttemperaturesfrom-40°Cto+105°C.Thismakesitideallysuitedforcommunicationsapplications(forexample,OTN,SONET/SDH,xDSL,GbE,networking,wirelessinfrastructure),testandinstrumentationapplication
4、s,andhigh-speeddataconverters.Additionally,theVCXOfunctionenablesuseoftheCY2941x/CY2942xseriesinapplicationsrequiringaclocksourcewithvoltagecontrol,andindiscreteclockingsolutionsforsynchronoustimingapplicationsCY2941x/CY2942x系列主要特性：■Low-noisePLLforintegratedcrystalapplications■Dif
5、ferentialClockOutput:re-configurablethroughI2C■Outputfrequencysupportfrom15MHzto2.1GHz■FractionalNPLLwithfullyintegratedVCO■Worksonanintegratedfixedfrequencycrystal■LVPECL,LVDS,HCSL,andCMLoutputstandardsavailable■Compatiblewith3.3V,2.5V,and1.8Vsupply■150fstypicalintegratedjitterpe
6、rformanee(12kHzto20MHzfrequencyoffsets)foroutputsgreaterthan150MHz■VCXOfunctionalityprovidedwithtunableTotalPullRange(TPR)from±50ppmto±275PPm■8-pinLCCpackage7.0x5.0(CY2941x)or5.0x3.2(CY2942x)mm评估板CY3676TheCY3676EvaluationKit(EVK),isbuilttoevaluateournewproduct-CY29412,theHighPerfo
7、rmanceProgrammableOscillator.CY29412isan8・pin5x7LCCpackageddevice.CY3676EVKisdesignedtoenableyoutoevaluatetheprogrammableclockdeviceCY29412,thelatestadditiontoprogrammabledevicesinCypress'stimingproductportfolio.TheclockdeviceCY29412isahighperformaneeprogrammableoscillatorwithonef
8、ractionalPLLthatgeneratesanyfrequ
