参数资料
型号: OR4E041BM416-DB
厂商: LATTICE SEMICONDUCTOR CORP
元件分类: FPGA
英文描述: FPGA, 1296 CLBS, 380000 GATES, PBGA416
封装: PLASTIC, FBGA-416
文件页数: 128/151页
文件大小: 2680K
代理商: OR4E041BM416-DB
78
Lattice Semiconductor
Data Sheet
September, 2002
ORCA Series 4 FPGAs
TimingCharacteristics
Todefinespeedgrades,theORCAseriespartnumberdesignation(seeOrderingInformation)usesasingle-digit
numbertodesignateaspeedgrade.Thisnumberisnotrelatedtoanysingleacparameter.Highernumbersindi-
cateafastersetoftimingparameters.Theactualspeedsortingisbasedontestingthedelayinapathconsistingof
aninputbuffer,combinatorialdelaythroughallPLCsinarow,andanoutputbuffer.Othertestsarethendoneto
verifyotherdelayparameters,suchasroutingdelays,setuptimestoFFs,etc.
ThemostaccuratetimingcharacteristicsarereportedbythetiminganalyzerintheORCAFoundryDevelopment
System.Atimingreportprovidedbythedevelopmentsystemafterlayoutdividespathdelaysintologicandrouting
delays.Thetiminganalyzercanalsoprovidelogicdelayspriortolayout.Whilethisallowsroutingbudgetesti-
mates,thereiswidevarianceinroutingdelaysassociatedwithdifferentlayouts.
ThelogictimingparametersnotedintheElectricalCharacteristicssectionofthisdatasheetarethesameasthose
inORCAFoundry.Inthetimingtablesthatfollow,symbolnamesaregenerallyaconcatenationofthePFUoperat-
ingmode(asdefinedinTable3)andtheparametertype.Thesetup,hold,andpropagationdelayparameters,
definedbelow,aredesignatedinthesymbolnamebytheSET,HLD,andDELcharacters,respectively.Thevalues
givenfortheparametersarethesameasthoseusedduringproductiontestingandspeedbinningofthedevices.
Thejunctiontemperatureandsupplyvoltageusedtocharacterizethedevicesarelistedinthedelaytablesandthe
delayvaluesinthisdatasheetarefromORCAFoundry2001.Actualdelaysatnominaltemperatureandvoltage
forbest-caseprocessescanbemuchbetterthanthevaluesgiven.
Itshouldbenotedthatthejunctiontemperatureusedinthetablesisgenerally85°C.Thejunctiontemperaturefor
theFPGAdependsonthepowerdissipatedbythedevice,thepackagethermalcharacteristics(ΘJA),andthe
ambienttemperature,ascalculatedinthefollowingequationandasdiscussedfurtherinthePackageThermal
Characteristicssection:
TJmax=TAmax+(PΘJA)°C
Note: TheusermustdeterminethisjunctiontemperaturetoseeifthedelaysfromORCAFoundryshouldbeder-
atedbasedonthefollowingderatingtables.
Table37—Table38provideapproximatepowersupplyandjunctiontemperaturederatingforSeries4industrial
devices.ThedelayvaluesinthisdatasheetandreportedbyORCAFoundryareshownas1.00inthetables.The
methodfordeterminingthemaximumjunctiontemperatureisdefinedinthePackageThermalCharacteristicssec-
tion.Takencumulatively,therangeofparametervaluesforbest-casevs.worst-caseprocessing,supplyvoltage,
andjunctiontemperaturecanapproach3to1.
ThetypicaltimingpathinSeries4ismadeupofboth3.3V(VDDIOand/orVDD33)componentsand1.5V(VDD15)
components.Forexample,allI/OcircuitsuseVDDIOatthedeviceinterfacebutallinternalroutingandI/Oregister
logicuseVDD15.Thusactualvoltagederatingneedstobedonebasedonmultipleparameters.Asimpleapproxi-
mationisthat50%ofthedelaypathisduetoeachoftheseparameters.AllinternalpathsuseVDD15forlogicand
VDD33forrouting,butifVDD33remainsabove3.0Vtheinternaldelayscanbeassumedtobedependenton
VDD15deratingvaluesonly.Notehoweverthattemperaturederatingisapproximatelythesamepercentageforall
threesupplyvoltagesthusallowingonetemperaturederatingvaluetobeused.Forthemostaccurateresults,volt-
ageandtemperaturederatingcapabilitiestobereleasedinORCAFoundry2001shouldbeused.
Table37.I/ODeratingfor3.3VI/Os(VDDIO)—OnlyvalidforTTL/CMOSI/Os
TJ
(°C)
PowerSupplyVoltage
3.0V
3.15V
3.3V
3.45V
3.6V
–40
0.83
0.81
0.78
0.76
0.75
0
0.87
0.84
0.81
0.80
0.78
25
0.91
0.88
0.85
0.82
0.81
85
1.00
0.97
0.93
0.91
0.88
100
1.02
0.99
0.96
0.93
0.90
125
1.07
1.03
0.99
0.97
0.94
相关PDF资料
PDF描述
OR4E041BM680-DB FPGA, 1296 CLBS, 380000 GATES, PBGA680
OR4E042BA352-DB FPGA, 1296 CLBS, 380000 GATES, PBGA352
OR4E042BM416-DB FPGA, 1296 CLBS, 380000 GATES, PBGA416
OR4E042BM680-DB FPGA, 1296 CLBS, 380000 GATES, PBGA680
OR4E043BA352-DB FPGA, 1296 CLBS, 380000 GATES, PBGA352
相关代理商/技术参数
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