referencedhaole018.com

haole018.com  时间:2021-03-18  阅读:()
DS90LV018Awww.
ti.
comSNLS014D–JUNE1998–REVISEDAPRIL2013DS90LV018A3VLVDSSingleCMOSDifferentialLineReceiverCheckforSamples:DS90LV018A1FEATURESDESCRIPTIONTheDS90LV018AisasingleCMOSdifferentialline2>400Mbps(200MHz)SwitchingRatesreceiverdesignedforapplicationsrequiringultralow50psDifferentialSkew(Typical)powerdissipation,lownoiseandhighdatarates.
The2.
5nsMaximumPropagationDelaydeviceisdesignedtosupportdataratesinexcessof400Mbps(200MHz)utilizingLowVoltageDifferential3.
3VPowerSupplyDesignSignaling(LVDS)technology.
Flow-ThroughPinoutTheDS90LV018Aacceptslowvoltage(350mVPowerDownHighImpedanceonLVDSInputstypical)differentialinputsignalsandtranslatesthemLowPowerDesign(18mW@3.
3VStatic)to3VCMOSoutputlevels.
ThereceiveralsoInteroperablewithExisting5VLVDSNetworkssupportsopen,shortedandterminated(100Ω)inputfail-safe.
ThereceiveroutputwillbeHIGHforallfail-AcceptsSmallSwing(350mVTypical)safeconditions.
TheDS90LV018Ahasaflow-throughDifferentialSignalLevelsdesignforeasyPCBlayout.
SupportsOpen,ShortandTerminatedInputTheDS90LV018AandcompanionLVDSlinedriverFail-SafeprovideanewalternativetohighpowerPECL/ECLConformstoANSI/TIA/EIA-644Standarddevicesforhighspeedpoint-to-pointinterfaceIndustrialTemperatureOperatingRangeapplications.
–(40°Cto+85°C)AvailableinSOICPackageConnectionDiagramFigure1.
SOICSeePackageNumberD(R-PDSO-G8)FunctionalDiagramTruthTableINPUTSOUTPUT[RIN+][RIN]ROUTVID≥0.
1VHVID≤0.
1VLFullFail-safeOPEN/SHORTorTerminatedH1Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright1998–2013,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.
Productionprocessingdoesnotnecessarilyincludetestingofallparameters.
DS90LV018ASNLS014D–JUNE1998–REVISEDAPRIL2013www.
ti.
comThesedeviceshavelimitedbuilt-inESDprotection.
TheleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoamduringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
AbsoluteMaximumRatings(1)SupplyVoltage(VCC)0.
3Vto+4VInputVoltage(RIN+,RIN)0.
3Vto+3.
9VOutputVoltage(ROUT)0.
3Vto(VCC+0.
3V)MaximumPackagePowerDissipation@+25°CDPackage1025mWDerateDPackage8.
2mW/°Cabove+25°CStorageTemperatureRange65°Cto+150°CLeadTemperatureRangeSoldering(4sec.
)+260°CMaximumJunctionTemperature+150°CESDRating(HBM1.
5kΩ,100pF)≥7kV(EIAJ0Ω,200pF)≥500V(1)"AbsoluteMaximumRatings"arethosevaluesbeyondwhichthesafetyofthedevicecannotbespecified.
Theyarenotmeanttoimplythatthedevicesshouldbeoperatedattheselimits.
ElectricalCharacteristicsspecifiesconditionsofdeviceoperation.
RecommendedOperatingConditionsMinTypMaxUnitsSupplyVoltage(VCC)+3.
0+3.
3+3.
6VReceiverInputVoltageGND3.
0VOperatingFreeAirTemperature(TA)4025+85°C2SubmitDocumentationFeedbackCopyright1998–2013,TexasInstrumentsIncorporatedProductFolderLinks:DS90LV018ADS90LV018Awww.
ti.
comSNLS014D–JUNE1998–REVISEDAPRIL2013ElectricalCharacteristicsOverSupplyVoltageandOperatingTemperatureranges,unlessotherwisespecified.
(1)(2)SymbolParameterConditionsPinMinTypMaxUnitsVTHDifferentialInputHighThresholdVCM=+1.
2V,0V,3V(3)RIN+,+100mVRINVTLDifferentialInputLowThreshold100mVIINInputCurrentVIN=+2.
8VVCC=3.
6Vor0V10±1+10μAVIN=0V10±1+10μAVIN=+3.
6VVCC=0V-20+20μAVOHOutputHighVoltageIOH=0.
4mA,VID=+200mVROUT2.
73.
1VIOH=0.
4mA,Inputsterminated2.
73.
1VIOH=0.
4mA,Inputsshorted2.
73.
1VVOLOutputLowVoltageIOL=2mA,VID=200mV0.
30.
5VIOSOutputShortCircuitCurrentVOUT=0V(4)1550100mAVCLInputClampVoltageICL=18mA1.
50.
8VICCNoLoadSupplyCurrentInputsOpenVCC5.
49mA(1)Currentintodevicepinsisdefinedaspositive.
Currentoutofdevicepinsisdefinedasnegative.
Allvoltagesarereferencedtogroundunlessotherwisespecified(suchasVID).
(2)Alltypicalsaregivenfor:VCC=+3.
3VandTA=+25°C.
(3)VCCisalwayshigherthanRIN+andRINvoltage.
RIN+andRINareallowedtohavevoltagerange0.
05Vto+3.
05V.
VIDisnotallowedtobegreaterthan100mVwhenVCM=0Vor3V.
(4)Outputshortcircuitcurrent(IOS)isspecifiedasmagnitudeonly,minussignindicatesdirectiononly.
Onlyoneoutputshouldbeshortedatatime,donotexceedmaximumjunctiontemperaturespecification.
SwitchingCharacteristicsVCC=+3.
3V±10%,TA=40°Cto+85°C(1)(2)SymbolParameterConditionsMinTypMaxUnitstPHLDDifferentialPropagationDelayHightoLowCL=15pF1.
01.
62.
5nstPLHDDifferentialPropagationDelayLowtoHighVID=200mV1.
01.
72.
5nstSKD1DifferentialPulseSkew|tPHLDtPLHD|(3)(Figure2andFigure3)050400pstSKD3DifferentialParttoPartSkew(4)01.
0nstSKD4DifferentialParttoPartSkew(5)01.
5nstTLHRiseTime325800pstTHLFallTime225800psfMAXMaximumOperatingFrequency(6)200250MHz(1)CLincludesprobeandjigcapacitance.
(2)Generatorwaveformforalltestsunlessotherwisespecified:f=1MHz,ZO=50Ω,trandtf(0%to100%)≤3nsforRIN.
(3)tSKD1isthemagnitudedifferenceindifferentialpropagationdelaytimebetweenthepositive-going-edgeandthenegative-going-edgeofthesamechannel.
(4)tSKD3,parttopartskew,isthedifferentialchannel-to-channelskewofanyeventbetweendevices.
ThisspecificationappliestodevicesatthesameVCCandwithin5°Cofeachotherwithintheoperatingtemperaturerange.
(5)tSKD4,parttopartskew,isthedifferentialchannel-to-channelskewofanyeventbetweendevices.
Thisspecificationappliestodevicesovertherecommendedoperatingtemperatureandvoltageranges,andacrossprocessdistribution.
tSKD4isdefinedas|MaxMin|differentialpropagationdelay.
(6)fMAXgeneratorinputconditions:tr=tf100k),lowcapacitance(<2pF)scopeprobeswithawidebandwidth(1GHz)scope.
Improperprobingwillgivedeceivingresults.
CABLESANDCONNECTORS,GENERALCOMMENTSWhenchoosingcableandconnectorsforLVDSitisimportanttoremember:Usecontrolledimpedancemedia.
Thecablesandconnectorsyouuseshouldhaveamatcheddifferentialimpedanceofabout100.
Theyshouldnotintroducemajorimpedancediscontinuities.
Balancedcables(e.
g.
twistedpair)areusuallybetterthanunbalancedcables(ribboncable,simplecoax)fornoisereductionandsignalquality.
BalancedcablestendtogeneratelessEMIduetofieldcancelingeffectsandalsotendtopickupelectromagneticradiationacommon-mode(notdifferentialmode)noisewhichisrejectedbythereceiver.
Forcabledistances<0.
5M,mostcablescanbemadetoworkeffectively.
Fordistances0.
5M≤d≤10M,CAT3(category3)twistedpaircableworkswell,isreadilyavailableandrelativelyinexpensive.
6SubmitDocumentationFeedbackCopyright1998–2013,TexasInstrumentsIncorporatedProductFolderLinks:DS90LV018ADS90LV018Awww.
ti.
comSNLS014D–JUNE1998–REVISEDAPRIL2013PinDescriptionsPinNo.
NameDescription1RIN-Invertingreceiverinputpin2RIN+Non-invertingreceiverinputpin7ROUTReceiveroutputpin8VCCPowersupplypin,+3.
3V±0.
3V5GNDGroundpin3,4,6NCNoconnectionCopyright1998–2013,TexasInstrumentsIncorporatedSubmitDocumentationFeedback7ProductFolderLinks:DS90LV018ADS90LV018ASNLS014D–JUNE1998–REVISEDAPRIL2013www.
ti.
comTypicalPerformanceCharacteristicsOutputHighVoltagevsOutputLowVoltagevsPowerSupplyVoltagePowerSupplyVoltageOutputShortCircuitCurrentvsDifferentialTransitionVoltagevsPowerSupplyVoltagePowerSupplyVoltagePowerSupplyCurrentPowerSupplyCurrentvsvsFrequencyAmbientTemperature8SubmitDocumentationFeedbackCopyright1998–2013,TexasInstrumentsIncorporatedProductFolderLinks:DS90LV018ADS90LV018Awww.
ti.
comSNLS014D–JUNE1998–REVISEDAPRIL2013TypicalPerformanceCharacteristics(continued)DifferentialPropagationDelayvsDifferentialPropagationDelayvsPowerSupplyVoltageAmbientTemperatureDifferentialSkewvsDifferentialSkewvsPowerSupplyVoltageAmbientTemperatureDifferentialPropagationDelayvsDifferentialPropagationDelayvsDifferentialInputVoltageCommon-ModeVoltageCopyright1998–2013,TexasInstrumentsIncorporatedSubmitDocumentationFeedback9ProductFolderLinks:DS90LV018ADS90LV018ASNLS014D–JUNE1998–REVISEDAPRIL2013www.
ti.
comTypicalPerformanceCharacteristics(continued)TransitionTimevsTransitionTimevsPowerSupplyVoltageAmbientTemperatureDifferentialPropagationDelayTransitionTimevsLoadvsLoadDifferentialPropagationDelayTransitionTimevsLoadvsLoad10SubmitDocumentationFeedbackCopyright1998–2013,TexasInstrumentsIncorporatedProductFolderLinks:DS90LV018ADS90LV018Awww.
ti.
comSNLS014D–JUNE1998–REVISEDAPRIL2013REVISIONHISTORYChangesfromRevisionC(April2013)toRevisionDPageChangedlayoutofNationalDataSheettoTIformat10Copyright1998–2013,TexasInstrumentsIncorporatedSubmitDocumentationFeedback11ProductFolderLinks:DS90LV018APACKAGEOPTIONADDENDUMwww.
ti.
com11-Jan-2021Addendum-Page1PACKAGINGINFORMATIONOrderableDeviceStatus(1)PackageTypePackageDrawingPinsPackageQtyEcoPlan(2)Leadfinish/Ballmaterial(6)MSLPeakTemp(3)OpTemp(°C)DeviceMarking(4/5)SamplesDS90LV018ATMNRNDSOICD895Non-RoHS&GreenCallTICallTI-40to8590LV018ATMDS90LV018ATM/NOPBACTIVESOICD895RoHS&GreenSNLevel-1-260C-UNLIM-40to8590LV018ATMDS90LV018ATMX/NOPBACTIVESOICD82500RoHS&GreenSNLevel-1-260C-UNLIM-40to8590LV018ATM(1)Themarketingstatusvaluesaredefinedasfollows:ACTIVE:Productdevicerecommendedfornewdesigns.
LIFEBUY:TIhasannouncedthatthedevicewillbediscontinued,andalifetime-buyperiodisineffect.
NRND:Notrecommendedfornewdesigns.
Deviceisinproductiontosupportexistingcustomers,butTIdoesnotrecommendusingthispartinanewdesign.
PREVIEW:Devicehasbeenannouncedbutisnotinproduction.
Samplesmayormaynotbeavailable.
OBSOLETE:TIhasdiscontinuedtheproductionofthedevice.
(2)RoHS:TIdefines"RoHS"tomeansemiconductorproductsthatarecompliantwiththecurrentEURoHSrequirementsforall10RoHSsubstances,includingtherequirementthatRoHSsubstancedonotexceed0.
1%byweightinhomogeneousmaterials.
Wheredesignedtobesolderedathightemperatures,"RoHS"productsaresuitableforuseinspecifiedlead-freeprocesses.
TImayreferencethesetypesofproductsas"Pb-Free".
RoHSExempt:TIdefines"RoHSExempt"tomeanproductsthatcontainleadbutarecompliantwithEURoHSpursuanttoaspecificEURoHSexemption.
Green:TIdefines"Green"tomeanthecontentofChlorine(Cl)andBromine(Br)basedflameretardantsmeetJS709Blowhalogenrequirementsof<=1000ppmthreshold.
Antimonytrioxidebasedflameretardantsmustalsomeetthe<=1000ppmthresholdrequirement.
(3)MSL,PeakTemp.
-TheMoistureSensitivityLevelratingaccordingtotheJEDECindustrystandardclassifications,andpeaksoldertemperature.
(4)Theremaybeadditionalmarking,whichrelatestothelogo,thelottracecodeinformation,ortheenvironmentalcategoryonthedevice.
(5)MultipleDeviceMarkingswillbeinsideparentheses.
OnlyoneDeviceMarkingcontainedinparenthesesandseparatedbya"~"willappearonadevice.
IfalineisindentedthenitisacontinuationofthepreviouslineandthetwocombinedrepresenttheentireDeviceMarkingforthatdevice.
(6)Leadfinish/Ballmaterial-OrderableDevicesmayhavemultiplematerialfinishoptions.
Finishoptionsareseparatedbyaverticalruledline.
Leadfinish/Ballmaterialvaluesmaywraptotwolinesifthefinishvalueexceedsthemaximumcolumnwidth.
ImportantInformationandDisclaimer:TheinformationprovidedonthispagerepresentsTI'sknowledgeandbeliefasofthedatethatitisprovided.
TIbasesitsknowledgeandbeliefoninformationprovidedbythirdparties,andmakesnorepresentationorwarrantyastotheaccuracyofsuchinformation.
Effortsareunderwaytobetterintegrateinformationfromthirdparties.
TIhastakenandcontinuestotakereasonablestepstoproviderepresentativeandaccurateinformationbutmaynothaveconducteddestructivetestingorchemicalanalysisonincomingmaterialsandchemicals.
TIandTIsuppliersconsidercertaininformationtobeproprietary,andthusCASnumbersandotherlimitedinformationmaynotbeavailableforrelease.
PACKAGEOPTIONADDENDUMwww.
ti.
com11-Jan-2021Addendum-Page2InnoeventshallTI'sliabilityarisingoutofsuchinformationexceedthetotalpurchasepriceoftheTIpart(s)atissueinthisdocumentsoldbyTItoCustomeronanannualbasis.
TAPEANDREELINFORMATION*AlldimensionsarenominalDevicePackageTypePackageDrawingPinsSPQReelDiameter(mm)ReelWidthW1(mm)A0(mm)B0(mm)K0(mm)P1(mm)W(mm)Pin1QuadrantDS90LV018ATMX/NOPBSOICD82500330.
012.
46.
55.
42.
08.
012.
0Q1PACKAGEMATERIALSINFORMATIONwww.
ti.
com24-Aug-2017PackMaterials-Page1*AlldimensionsarenominalDevicePackageTypePackageDrawingPinsSPQLength(mm)Width(mm)Height(mm)DS90LV018ATMX/NOPBSOICD82500367.
0367.
035.
0PACKAGEMATERIALSINFORMATIONwww.
ti.
com24-Aug-2017PackMaterials-Page2www.
ti.
comPACKAGEOUTLINEC.
228-.
244TYP[5.
80-6.
19].
069MAX[1.
75]6X.
050[1.
27]8X.
012-.
020[0.
31-0.
51]2X.
150[3.
81].
005-.
010TYP[0.
13-0.
25]0-8.
004-.
010[0.
11-0.
25].
010[0.
25].
016-.
050[0.
41-1.
27]4X(0-15)A.
189-.
197[4.
81-5.
00]NOTE3B.
150-.
157[3.
81-3.
98]NOTE44X(0-15)(.
041)[1.
04]SOIC-1.
75mmmaxheightD0008ASMALLOUTLINEINTEGRATEDCIRCUIT4214825/C02/2019NOTES:1.
Lineardimensionsareininches[millimeters].
Dimensionsinparenthesisareforreferenceonly.
Controllingdimensionsareininches.
DimensioningandtolerancingperASMEY14.
5M.
2.
Thisdrawingissubjecttochangewithoutnotice.
3.
Thisdimensiondoesnotincludemoldflash,protrusions,orgateburrs.
Moldflash,protrusions,orgateburrsshallnotexceed.
006[0.
15]perside.
4.
Thisdimensiondoesnotincludeinterleadflash.
5.
ReferenceJEDECregistrationMS-012,variationAA.
18.
010[0.
25]CAB54PIN1IDAREASEATINGPLANE.
004[0.
1]CSEEDETAILADETAILATYPICALSCALE2.
800www.
ti.
comEXAMPLEBOARDLAYOUT.
0028MAX[0.
07]ALLAROUND.
0028MIN[0.
07]ALLAROUND(.
213)[5.
4]6X(.
050)[1.
27]8X(.
061)[1.
55]8X(.
024)[0.
6](R.
002)TYP[0.
05]SOIC-1.
75mmmaxheightD0008ASMALLOUTLINEINTEGRATEDCIRCUIT4214825/C02/2019NOTES:(continued)6.
PublicationIPC-7351mayhavealternatedesigns.
7.
Soldermasktolerancesbetweenandaroundsignalpadscanvarybasedonboardfabricationsite.
METALSOLDERMASKOPENINGNONSOLDERMASKDEFINEDSOLDERMASKDETAILSEXPOSEDMETALOPENINGSOLDERMASKMETALUNDERSOLDERMASKSOLDERMASKDEFINEDEXPOSEDMETALLANDPATTERNEXAMPLEEXPOSEDMETALSHOWNSCALE:8XSYMM1458SEEDETAILSSYMMwww.
ti.
comEXAMPLESTENCILDESIGN8X(.
061)[1.
55]8X(.
024)[0.
6]6X(.
050)[1.
27](.
213)[5.
4](R.
002)TYP[0.
05]SOIC-1.
75mmmaxheightD0008ASMALLOUTLINEINTEGRATEDCIRCUIT4214825/C02/2019NOTES:(continued)8.
Lasercuttingapertureswithtrapezoidalwallsandroundedcornersmayofferbetterpasterelease.
IPC-7525mayhavealternatedesignrecommendations.
9.
Boardassemblysitemayhavedifferentrecommendationsforstencildesign.
SOLDERPASTEEXAMPLEBASEDON.
005INCH[0.
125MM]THICKSTENCILSCALE:8XSYMMSYMM1458IMPORTANTNOTICEANDDISCLAIMERTIPROVIDESTECHNICALANDRELIABILITYDATA(INCLUDINGDATASHEETS),DESIGNRESOURCES(INCLUDINGREFERENCEDESIGNS),APPLICATIONOROTHERDESIGNADVICE,WEBTOOLS,SAFETYINFORMATION,ANDOTHERRESOURCES"ASIS"ANDWITHALLFAULTS,ANDDISCLAIMSALLWARRANTIES,EXPRESSANDIMPLIED,INCLUDINGWITHOUTLIMITATIONANYIMPLIEDWARRANTIESOFMERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEORNON-INFRINGEMENTOFTHIRDPARTYINTELLECTUALPROPERTYRIGHTS.
TheseresourcesareintendedforskilleddevelopersdesigningwithTIproducts.
Youaresolelyresponsiblefor(1)selectingtheappropriateTIproductsforyourapplication,(2)designing,validatingandtestingyourapplication,and(3)ensuringyourapplicationmeetsapplicablestandards,andanyothersafety,security,orotherrequirements.
Theseresourcesaresubjecttochangewithoutnotice.
TIgrantsyoupermissiontousetheseresourcesonlyfordevelopmentofanapplicationthatusestheTIproductsdescribedintheresource.
Otherreproductionanddisplayoftheseresourcesisprohibited.
NolicenseisgrantedtoanyotherTIintellectualpropertyrightortoanythirdpartyintellectualpropertyright.
TIdisclaimsresponsibilityfor,andyouwillfullyindemnifyTIanditsrepresentativesagainst,anyclaims,damages,costs,losses,andliabilitiesarisingoutofyouruseoftheseresources.
TI'sproductsareprovidedsubjecttoTI'sTermsofSale(https:www.
ti.
com/legal/termsofsale.
html)orotherapplicabletermsavailableeitheronti.
comorprovidedinconjunctionwithsuchTIproducts.
TI'sprovisionoftheseresourcesdoesnotexpandorotherwisealterTI'sapplicablewarrantiesorwarrantydisclaimersforTIproducts.
IMPORTANTNOTICEMailingAddress:TexasInstruments,PostOfficeBox655303,Dallas,Texas75265Copyright2021,TexasInstrumentsIncorporated

新注册NameCheap账户几天后无法登录原因及解决办法

中午的时候有网友联系提到自己前几天看到Namecheap商家开学季促销活动期间有域名促销活动的,于是就信注册NC账户注册域名的。但是今天登录居然无法登录,这个问题比较困恼是不是商家跑路等问题。Namecheap商家跑路的可能性不大,前几天我还在他们家转移域名的。这里简单的记录我帮助他解决如何重新登录Namecheap商家的问题。1、检查邮件让他检查邮件是不是有官方的邮件提示。比如我们新注册账户是需...

欧路云:美国CUVIP线路10G防御,8折优惠,19元/月起

欧路云新上了美国洛杉矶cera机房的云服务器,具备弹性云特征(可自定义需要的资源配置:E5-2660 V3、内存、硬盘、流量、带宽),直连网络(联通CUVIP线路),KVM虚拟,自带一个IP,支持购买多个IP,10G的DDoS防御。付款方式:PayPal、支付宝、微信、数字货币(BTC USDT LTC ETH)测试IP:23.224.49.126云服务器 全场8折 优惠码:zhujiceping...

bgpto:独立服务器夏季促销,日本机器6.5折、新加坡7.5折,20M带宽,低至$93/月

bgp.to对日本机房、新加坡机房的独立服务器在搞特价促销,日本独立服务器低至6.5折优惠,新加坡独立服务器低至7.5折优惠,所有优惠都是循环的,终身不涨价。服务器不限制流量,支持升级带宽,免费支持Linux和Windows server中文版(还包括Windows 10). 特色:自动部署,无需人工干预,用户可以在后台自己重装系统、重启、关机等操作!官方网站:https://www.bgp.to...

haole018.com为你推荐
小度商城小度在家智能屏Air性价比高吗?懂行的进~2020双十一成绩单2020年12月四级考试什么时候出成绩李子柒年入1.6亿魔兽rpg箱庭世界1.6怎么进入魔门李子柒年入1.6亿新晋网红李子柒是不是背后有团队是摆拍、炒作为的是人气、流量?李子柒年入1.6亿李子柒男朋友是谁,李子柒父母怎么去世的?李子柒年入1.6亿将55g铁片放入硫酸铜溶液中片刻,取出洗净,干燥后,称重为56.6g,问生成铜多少g??求解题步骤及答案罗伦佐娜手上鸡皮肤怎么办,维洛娜毛周角化修复液sss17.com一玩棋牌吧(www.17wqp.com)怎么样?m.2828dy.comwww.dy6868.com这个电影网怎么样?www.zjs.com.cn中通快递投诉网站网址是什么?
海外域名注册 kvmla 海外服务器 isatap 美国主机论坛 便宜建站 免费ddos防火墙 国内php空间 qq数据库 网盘申请 500m空间 京东商城双十一活动 中国智能物流骨干网 东莞数据中心 789 秒杀品 全能空间 工信部网站备案查询 免费网络 国外免费云空间 更多