六层板pcb布线经验-飞思卡尔工程师.pdf

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1、FreescaleSemiconductorDocumentNumber:AN3535ApplicationNoteRev.0,2/2008AStrategyforRoutingtheMPC8544EinaSix-LayerPCBbyMichaelGeorgeNMGApplicationsFreescaleSemiconductor,Inc.Austin,TexasThisapplicationnoteisadesignguidetoassistthecustomerContents1.References......................

2、............2increatingalow-layer,low-cost,PCBdesignwhenusingthe2.BallmapOrganization.........................2MPC8544Edevice.Keyitemsofdiscussioninclude3.InterfaceSupportinSixLayers.................3assumedPCBstackup,powerdelivery,andpropersignal4.BoardStackupConsiderations...

3、...............4referencing.Additionally,layoutplotsforthedevicefan-out5.SignalBreakout..............................66.ViaUsage..................................9arealsoincluded.7.PowerandGroundStrategy...................108.SignalLayerGerberPlot.....................20NOTE9.Fa

4、n-OutSchematics.........................24TheschematicandGerberdatashownwithin10.CurrentDeliveryintheBGAField..............39thisapplicationnoteareintendedmerelyto11.RevisionHistory............................43demonstratethefan-outandpowerdeliverystrategynecessarytoachieveasix

5、-layerPCB.TheschematicandGerberdatadoesnotincludeallthedecoupling,nordotheyshowallthenecessarypull-upsandACcapsrequiredoutsidetheBGAfan-outarea.ThislevelofdetailiscapturedaspartoftheMPC8544Edevelopmentsystem.©FreescaleSemiconductor,Inc.,2008.Allrightsreserved.References1Referen

6、cesTable1listsreferencesmentionedinthisapplicationnote,aswellasusefulresourcesforfurtherreading.Table1.ReferencesDocumentSourceIPCStandards:www.ipc.orgIPC-D-275IPC-2221AIPC-2152NewCorrelationsBetweenElectricalCurrentand20thIEEESEMI-THERMSymposiumTemperatureRiseinPCBTraces0-7803

7、-8363-X/04/$20.00©2004IEEEJohannesAdam,www.flomerics.com/flotherm/technical_papers/t341.pdfFlomericsLtd.Current-CarryingCapacity,MartinTarr,UniversityofBoltonwww.ami.ac.uk/courses/ami4817_dti/u02/pdf/meah0221.pdfInteractivetrace-widthcalculatorhttp://circuitcalculator.com/wordp

8、ress/2006/01/31/pcb-trace-width-calculator2BallmapOrga