N8NLSD4BT-T55Bluetooth Module

1 LSD4BT-T55ASTD001 ProductSpecification ProductName：T55BLEMESHMODULE ProductModel：LSD4BT-T55ASTD001 FileVersion：Rev04 2 文件修订历史 序号修改日志修改人审核人文件版本修改日期 1InitialVersiongqsxtRev012020-6-9 2 1，Addflashoperationinstructions；2， Typicalcircuitdescription; gqsxtRev022020-8-11 3 1.Correcttherepeatedpindescription; 2.Adddistancedescription gqsxtRev032020-10-10 4CorrectwritingerrorsgqsxtRev042021-01-29 3 TableofContents TABLEOFCONTENTS ..................................................................................................................................... 3 CHAPTER1OVERVIEW ................................................................................................................................. 4 1.1MODULEFUNCTIONCHARACTERISTICS ........................................................................................................ 4 1.2APPLICATIONOCCASION ............................................................................................................................ 4 CHAPTER2SPECIFICATIONS ......................................................................................................................... 5 CHAPTER3HARDWARELAYOUTANDINTERFACEDESCRIPTION ............................................................... 6 3.1OVERALLDIMENSIONDRAWING ................................................................................................................. 6 3.2PINDIAGRAM .......................................................................................................................................... 6 3.3TYPICALCIRCUIT ...................................................................................................................................... 8 CHAPTER4PRODUCTIONGUIDANCE ................................................................................................ 8 4.1PRODUCTIONGUIDE ................................................................................................................................. 8 4.2R EQUIREMENTSON P OSITIONSOF M ODULEON B ACKPLANE ......................................................... 9 4.3O PENING D ESIGNOF S TEEL M ESH .................................................................................................... 9 THELANDPOSITIONOFTHEMODULECANBELOCALLYTHICKENEDTO0.15~0.20MM,SOASTO PREVENTVOIDSOLDER; 4.4SOPFORREFLOW ........................................................................................... 9 CHAPER5PRODUCTPACKAGE ................................................................................................................... 11 5.1P ACKAGING M ETHOD ....................................................................................................................... 11 5.2STRIPSIZE ............................................................................................................................................. 11 4 Chapter1Overview T55serieslow-powerBluetoothmoduleisahigh-performanceBluetoothmoduledevelopedbased ontelinklow-powerBluetoothSOCtlsr8250chip.Themoduleadoptsstamptypeandsideplug-in interface,whichisexquisite,compact,fullportledoutandeasytouse.Ithelpsusersbypassthe cumbersomerfhardwaredesign,developmentandproduction.Userscaneasilyrealizethe developmentofBluetoothapplicationsonthisbasis,ShortentheR&Dcycleandhelpyouseizethe marketopportunity. Table1-1ModelDescription ModelDescription LSD4BT-T55ASTD001 PCBantenna,notincludesoftware.Ifitisaproductwithsoftware, pleasecommunicatethespecificmodelandMPQwiththesales department 1.1ModuleFunctionCharacteristics OperationVoltage：1.8to3.6V OperationFreq：2400MHzto2483.5MHz TXPower：Max10dBm（@3.3V）  RxSensitivity：-95dBm（@1Mbps） 1.2Applicationoccasion  Smartphoneandtabletperipheralproducts Wirelesssensornetworkssuchasdatacollection  WirelesswearableBluetoothdevice Smarthome,Smartcity 5 Chapter2Specifications Table2-1AbsoluteMaximumRatings Table2-2GeneralCharacteristics@Ta=25°C，VDD=3.3V Parameter Characteristics Remarks MINTYPMAX OperatingVoltage（V）1.83.33.6 OperatingTemperaturt （°C） -40/85 Freq(MHz)2400/2483.5 Channels/40/ Power Tx Current(mA) /6.3/@0dBm /18/@10dBm Rx Current(mA) /6/ 休眠电流 (uA) /0.4/ TX(dBm)/10/ RX(dBm)/-95/BLE@1Mbps，PER≤30.8%@1500packets ProtocolBLE5.0 InterfaceType3sidesstamphole Communication Distance 1 150mPrivateagreement,Freeenvironment 1."Communicationdistance"isaffectedbythesurroundingenvironment,airhumidityand otherfactors.Thedistanceismeasuredthroughthecommunicationbetweenthemobile phoneandthemoduleforreferenceonly. Unit MINMAX SupplyVoltage(VDD)-0.33.6V SupplyVoltage(IO)-0.3VDD+0.3V StorageTemperature（°C）-40150°C 6 Chapter3HardwareLayoutand InterfaceDescription 3.1OverallDimensionDrawing LSD4BT-T55Modulephysicaldrawingisshowninthefigure3-1： Fig.3-1LSD4BT-T55ModulePicture LSD4BT-T55ModulephysicalDimensionsareshowninthefigure3-2 ： Fig.3-2LSD4BT-T55模块外形尺寸图 A.Alllineardimensionsareinmillimeters. B.DimensioningandtolerancingperGB/T1804-m 3.2PinDiagram 7 Fig.3-3Package24-PinSMD Table3-1LSD4BT-T55PinDescription Module Pin IC Pin NameFuctionRemarks 1/ANTExternalAntennaInterface 20GNDGNDAllGNDshuldbeconnected 30GNDGNDAllGNDshuldbeconnected 431PWM3/PD2GeneralIO/PWM 532PWM1_N/PD3GeneralIO/PWM 61PWM2_N/PD4GeneralIO/PWM 72PD7GeneralIO 83UART_RX/PA0GeneralIO/UARTRX 94PA1GeneralIO 105SWS/PA7Debug/GeneralIO 116UART_TX/PB1GeneralIO/UARTTX 1214PWM4/PB4GeneralIO/PWM 1315PWM5/PB5GeneralIO/PWM 1418VCCPower 150GNDGNDAllGNDshuldbeconnected 1616ADC/PB6GeneralIO/ADC 1717ADC/PB7GeneralIO 1820PWM4_N/PC0GeneralIO/PWM 1921PWM_1/PC1GeneralIO/PWM 2022PWM0/PC2GeneralIO/PWM 2123PWM1/PC3GeneralIO/PWM 2224PWM2/PC4GeneralIO/PWM 2325RSTResetActivelow 240GNDGNDAllGNDshuldbeconnected 8 3.3TypicalCircuit Fig.3-4TypicalCircuit(PCBantenna) Fig.3-5TypicalCircuit(Externalantenna) Chapter4ProductionGuidance 4.1ProductionGuide ItissuggestedthestampholepackagingmodulemountedbyanSMTmachine,andthe mountingshallbefinishedwithin24hoursafterunpacking.Otherwise,itsneedtorepackageby vacuumizing,soastopreventpoormountingeffectduetodamp. 9 Ifthepac…

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ModularApprovalRequestFCC(KDB996369D01&Part15.212) FCCID:__N8NLSD4BT-T55_ ItemstobecoveredbySinglemodulartransmitters. Answerfromapplicant 1.ThemodulartransmittermusthaveitsownRFshielding.Yes,theEUThasbeen shielded,pleasereferthe EUTphotos. 2.Themodulartransmittermusthavebufferedmodulation/datainputs(ifsuch inputsareprovided)toensurethatthemodulewillcomplywithPart15 requirementsunderconditionsofexcessivedataratesorover-modulation. Yes,themodulardatainputs arebufferedthroughlogor microcontrollerconnections. Allmodulationanddata inputs arebufferedbycircuitryon thetransmitterchip 3.Themodulartransmittermusthaveitsownpowersupplyregulation.Yes,Powersupplyregulation isprovidedbycircuitryonthe CPUchip 4.ThemodulartransmittermustcomplywiththeantennarequirementsofSection 15.203and15.204(b)(c).Theantennamusteitherbepermanentlyattachedor employa“unique”antennacoupler(atallconnectionsbetweenthemoduleand theantenna,includingthecable). Yes,TheEUTmeettheFCC antennarequirements 5.Themodulartransmittermustbetestedinastand-aloneconfiguration,i.e.,the modulemustnotbeinsideanotherdeviceduringtesting.Thisisintendedto demonstratethatthemoduleiscapableofcomplyingwithPart15emissionlimits regardlessofthedeviceintowhichitiseventuallyinstalled. Yes,TheEUTiscan transmittingStand-alone, pleasereferthetestsetup photos 6.Themodulartransmittermustbeequippedwitheitherapermanentlyaffixedlabel ormustbecapableofelectronicallydisplayingitsFCCidentificationnumberin accordancewith15.212(a)(1)(vi)(A)/(B). Yes,Themoduleislabeled withitspermanentlyaffixed FCCIDlabel. 7.Themodulartransmittermustcomplywithanyspecificruleoroperating requirementsapplicabletothetransmitterandthemanufacturermustprovide adequateinstructionsalongwiththemoduletoexplainanysuchrequirements.A copyoftheseinstructionsmustbeincludedintheapplicationforequipment authorization.Forexample,thereareverystrictoperationalandtiming requirementsthatmustbemetbeforeatransmitterisauthorizedforoperationunder Section15.231.Forinstance,datatransmissionisprohibited,exceptforoperation underSection15.231(e),inwhichcasethereareseparatefieldstrengthleveland timingrequirements.Compliancewiththeserequirementsmustbeassured. Yes,TheEUTisfullcompliant withFCCrules 8.ThemodulartransmittermustcomplywithanyapplicableRFexposure requirements.Forexample,FCCRulesinSections1.1310,2.1091,2.1093,and specificSectionsofPart15,including15.319(i),15.407(f),15.253(f)and 15.255(g),requirethatUnlicensedPCS,UNIIandmillimeterwavedevices performroutineenvironmentalevaluationforRFExposuretodemonstrate compliance.Inaddition,spreadspectrumtransmittersoperatingunderSection 15.247arerequiredtoaddressRFExposurecompliance.Modulartransmitters approvedunderotherSectionsofPart15,whennecessary,mayalsoneedto addresscertainRFExposureconcerns,typicallybyprovidingspecificinstallation andoperatinginstructionsforusers,installersandotherinterestedpartiesto ensurecompliance. Yes,Thismoduleiscomplies withFCCCFR47part2.1091 andFCCKDB447498D01 GeneralRFExposure Guidancev06limit,Please referRFexposurereport. ItemstobecoveredbySplitmodulartransmitters. Answerfromapplicant 1.Themodulartransmittermustcomplywithallrequirementsofasinglemodular transmitterexceptforitems(1)&(5)oftheabovesinglemodularapproval requirements. 2.Onlytheradiofrontendmustbeshielded.Thephysicalcrystalandtuning capacitorsmaybelocatedexternaltotheshieldedradioelements.Theinterface betweenthesplitsectionsofthemodularsystemmustbedigitalwithaminimum signallingamplitudeof150mVpeak-to-peak. 3.Controlinformationandotherdatamaybeexchangedbetweenthetransmitter controlelementsandradiofrontend. 4.Thesectionsofasplitmodulartransmittermustbetestedinstalledinahost device(s)similartothatwhichisrepresentativeoftheplatform(s)intendedforuse. 5.Manufacturersmustensurethatonlytransmittercontrolelementsandradiofront endcomponentsthathavebeenapprovedtogetherarecapableofoperating together.Thetransmittermodulemustnotoperateunlessithasverifiedthatthe installedtransmittercontrolelementsandradiofrontendhavebeenauthorized together.Manufacturersmayusemeansincluding,butnotlimitedto,codingin hardwareandelectronicsignaturesinsoftwaretomeettheserequirements,and mustdescribethemethodsintheirapplicationforequipmentauthorization. Note:Alimitedmodularapproval(LMA)maybegrantedforsingleorsplitmodulartransmitters thatcomplypartiallywiththerequirementsabove. Nameandsurnameofapplicant(orauthorizedrepresentative):_HenryKim___ Date:____2021/8/23___________Signature:___________________________

Date:23August2021 LierdaScience&TechnologyGroupCo.,Ltd To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 ToWhomItMayConcern: TheLierdaScience&TechnologyGroupCo.,Ltdtheundersigned,herebyauthorizesMr.Wu XuewenfromShenzhenBALUNTechnologyCo.,Ltd.,toactonthebehalfoftheLierdaScience &TechnologyGroupCo.,LtdsolelyinmattersrelatingtotheapplicationforanFCCequipment authorizationforFCCID:N8NLSD4BT-T55includingthesigningofdocumentsinconnection withthisApplication.NecessaryactscarriedoutbyShenzhenBALUNTechnologyCo.,Ltd.in connectionwiththeApplicationshallhavethesameeffectasactsoftheLierdaScience& TechnologyGroupCo.,Ltd TheLierdaScience&TechnologyGroupCo.,Ltdalsoherebycertifythatnopartytothis applicationissubjecttoadenialofbenefits,includingFCCbenefits,pursuanttoSection5301of theAnti-DrugAbuseActof1988,21U.S.C.Section862. YoursSincerely, HenryKim

Date:23August2021 LierdaScience&TechnologyGroupCo.,Ltd To:FederalCommunicationsCommission, Authorization&EvaluationDivision, 7435OaklandMillsRoad, Columbia,MD21046 Re:LierdaScience&TechnologyGroupCo.,Ltd FCCID:N8NLSD4BT-T55 FCCCertificationConfidentialityRequest Gentlemen: Thisletteristocomplywith47CFR0.457and0.459pertainingtoconfidentiality material.LierdaScience&TechnologyGroupCo.,Ltdrequeststhatthefollowing documentsregardingthissubmissionforFCCID:N8NLSD4BT-T55bekept confidential: ExhibitTypeFileName BlockDiagramBlockDiagram.pdf SchematicsSchematics.pdf OperationalDescriptionOperationalDescription.pdf Andbelowexhibitkeptshort-termconfidential(180days): ExternalphotosExternalphotos.pdf Testsetupphotostestphoto.pdf InternalphotosInternalphotos.pdf UsermanualUsermanual.pdf Thosedocumentscontaindetailedsystemandequipmentdescriptionandrelated informationabouttheproductwhichLierdaScience&TechnologyGroupCo.,Ltd considerstobeconfidentialproprietary,acustomdesignand,otherwise,not releasabletothegeneralpublic.Sincethisdesignisabasisformwhichfuture technologicalproductswillevolve,LierdaScience&TechnologyGroupCo.,Ltd considersthisinformationwouldbeofbenefittoitscompetitors,andthatthe disclosureoftheinformationinthesedocumentswouldgivecompetitorsanunfair advantageinthemarket. YoursSincerely, HenryKim

Annex No.: BL-SZ2180120-AW 1 / 1 EUT EXTERNAL PHOTOS FRONT VIEW OF EUT REAR VIEW OF EUT

1、Lablecontent 2、Lablelocation ProductName:BluetoothModule ModuleP\N:LSD4BT-T55ASTD001 FCCID:N8NLSD4BT-T55 LierdaScience&TechnologyGroupCo.,Ltd.

Annex No.: BL-SZ2180120-AI 1 / 2 EUT INTERNAL PHOTOS MAIN BOARD TOP VIEW (WITH SHIELDING) MAIN BOARD REAR VIEW Annex No.: BL-SZ2180120-AI 2 / 2 MAIN BOARD TOP VIEW (WITHOUT SHIELDING) PCB Antenna RF Chip

RF Exposure Evaluation for FCC ID: N8NLSD4BT-T55 Refer user manual this device is a Bluetooth Module, and this device was designed used in Mobile devices that the minimum distance between human’s body is 20cm. Based on the 47CFR 2.1091, this device belongs to Mobile device. The definition of the category as following: Mobile Derives: CFR Title 47 §2.1091(b) (b) For purposes of this section, a mobile device is defined as a transmitting device designed to be used in other than fixed locations and to generally be used in such a way that a separation distance of at least 20 centimeters is normally maintained between the transmitter’s radiating structure(s) and the body of the user or nearby persons. FCC KDB 447498 D01 General RF Exposure Guidance v06 Limit Devices operating in standalone mobile exposure conditions may contain a single transmitter or multiple transmitters that do not transmit simultaneously. A minimum test separation distance ≥ 20 cm is required between the antenna and radiating structures of the device and nearby persons to apply mobile device exposure limits. The distance must be fully supported by the operating and installation configurations of the transmitter and its antenna(s), according to the source-based time-averaged maximum power requirements of § 2.1091(d)(2). In cases where cable losses or other attenuations are applied to determine compliance, the most conservative operating configurations and exposure conditions must be evaluated. The minimum test separation distance required for a device to comply with mobile exposure conditions must be clearly identified in the installation and operating instructions, for all installation and exposure conditions, to enable users and installers to comply with RF exposure requirements. For mobile devices that have the potential to operate in portable device exposure conditions, similar to the configurations described in § 2.1091(d)(4), a KDB inquiry is required to determine the SAR test requirements for demonstrating compliance. When the categorical exclusion provision of § 2.1091(c) applies, the minimum test separation distance may be estimated, when applicable, by simple calculations according to plane-wave equivalent conditions, to ensure the transmitter and its antenna(s) can operate in manners that meet or exceed the estimated distance. The source-based time-averaged maximum radiated power, according to the maximum antenna gain, must be applied to calculate the field strength and power density required to establish the minimum test separation distance. When the estimated test separation distance becomes overly conservative and does not support compliance, MPE measurement or computational modeling may be used to determine the required minimum separation distance. According to FCC Part 1.1307, systems operating under the provisions of this section shall be operated in a manner the ensures that the public is not exposed to radio frequency energy level in excess of the commission’s guidelines. Limits for General Population/ Uncontrolled Exposure Frequency Range (MHz) Electric Field Strength(E)(V/m) Magnetic Field Strength (H)(A/m) Power Density (S)(mW/cm 2 ) 0.3-1.34 614 1.63 (100)* 1.34-30 824/f 2.19/f (180/f2)* 30-300 27.5 0.073 0.2 300-1500 f/1500 1500-100,000 1.0 MPE calculation formula Where: S = power density P = output power (mW) G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = Separation distance between radiator and human body (cm) Test data BLUETOOTH Mode GFSK (BLE 1 Mbps) Low Channel Middle Channel High Channel Peak Power (dBm) 10.40 10.30 10.23 Note: This report listed the worst case peak power value, please refer to RF test report for more details. BLUETOOTH Mode GFSK (BLE 2 Mbps) Low Channel Middle Channel High Channel Peak Power (dBm) 10.43 10.48 10.33 Note: This report listed the worst case peak power value, please refer to RF test report for more details. Turn-up power Mode Range (dBm) Bluetooth 9.50-10.50 Test result Evolution mode Maximum peak output power （dBm） Antenna Gain (typical) (dBi): Total Power (mw) Distance (cm) Limit of Power Density (mW/cm²) Power Density (mW/cm²) Verdict Bluetooth 10.50 0 11.2 20 1.0 0.0022 Pass Note: 1. The Bluetooth Module work frequency range used is 2400 MHz ~ 2483.5 MHz, the result close to the limit by the above formula. 2. More power list please refer to RF test report. Conclusion: RF exposure Evaluation Results: Compliance

Report No.: BL-SZ2180120-601 2 / 67 Revision History Version Issue Date Revisions Content Rev. 01 Aug. 20, 2021 Initial Issue TABLE OF CONTENTS 1 ADMINISTRATIVE DATA (GENERAL INFORMATION) .......................................................................... 5 1.1 Identification of the Testing Laboratory ....................................................................................... 5 1.2 Identification of the Responsible Testing Location ...................................................................... 5 1.3 Laboratory Condition ................................................................................................................... 5 1.4 Announce .................................................................................................................................... 5 2 PRODUCT INFORMATION ...................................................................................................................... 6 2.1 Applicant Information ................................................................................................................... 6 2.2 Manufacturer Information ............................................................................................................ 6 2.3 Factory Information ..................................................................................................................... 6 2.4 General Description for Equipment under Test (EUT) ................................................................ 6 2.5 Technical Information .................................................................................................................. 7 2.6 Additional Instructions ................................................................................................................. 8 3 SUMMARY OF TEST RESULTS .............................................................................................................. 9 3.1 Test Standards ............................................................................................................................ 9 3.2 Verdict ......................................................................................................................................... 9 4 GENERAL TEST CONFIGURATIONS ................................................................................................... 10 4.1 Test Environments .................................................................................................................... 10 4.2 Test Equipment List ................................................................................................................... 10 4.3 Measurement Uncertainty ......................................................................................................... 10 4.4 Description of Test Setup .......................................................................................................... 11 4.4.1 For Antenna Port Test ............................................................................................................... 11 4.4.2 For AC Power Supply Port Test ................................................................................................ 1 1 4.4.3 For Radiated Test (Below 30 MHz) ........................................................................................... 12 4.4.4 For Radiated Test (30 MHz-1 GHz) .......................................................................................... 12 4.4.5 For Radiated Test (Above 1 GHz) ............................................................................................. 13 4.5 Measurement Results Explanation Example ............................................................................. 14 4.5.1 For conducted test items: .......................................................................................................... 14 Report No.: BL-SZ2180120-601 3 / 67 4.5.2 For radiated band edges and spurious emission test: ............................................................... 14 5 TEST ITEMS ........................................................................................................................................... 15 5.1 Antenna Requirements .............................................................................................................. 15 5.1.1 Relevant Standards ................................................................................................................... 15 5.1.2 Antenna Anti-Replacement Construction .................................................................................. 15 5.1.3 Antenna Gain ............................................................................................................................ 15 5.2 Output Power ............................................................................................................................ 16 5.2.1 Test Limit ................................................................................................................................... 16 5.2.2 Test Setup ................................................................................................................................. 16 5.2.3 Test Procedure .......................................................................................................................... 16 5.2.4 Test Result ................................................................................................................................ 17 5.3 Occupied Bandwidth ................................................................................................................. 18 5.3.1 Limit ........................................................................................................................................... 18 5.3.2 Test Setup ................................................................................................................................. 18 5.3.3 Test Procedure .................................…

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Annex No.: BL-SZ2180120-AR 1 / 4 TEST SETUP PHOTOS 1 Radiated Test Photo Below 30MHz 30MHz-1GHz Annex No.: BL-SZ2180120-AR 2 / 4 Close-up Above 1GHz Annex No.: BL-SZ2180120-AR 3 / 4 Close-up 2 Conducted Test Photo Conducted Test-BLE Annex No.: BL-SZ2180120-AR 4 / 4 3 Conducted Emissions Test Photo 1 Test Photo 2