LMX2335UTMNOPB;LMX2336UTM;LMX2335USLBX;LMX2336USLBX;LMX2336U

LMX2335U,LMX2336U

LMX2335U/LMX2336U PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications LMX2335U 1.2 GHz/1.2 GHzLMX2336U 2.0 GHz/1.2

GHz

Literature Number: SNAS059F

LMX2335U/LMX2336U

PLLatinum UltraLowPowerDualFrequencySynthesizerforRFPersonalCommunicationsLMX2335U1.2GHz/1.2GHzLMX2336U2.0GHz/1.2GHz

GeneralDescription

TheLMX2335UandLMX2336Udevicesarehighperfor-mancefrequencysynthesizerswithintegrateddualmodulusprescalers.TheLMX2335UandLMX2336UdevicesaredesignedforuseinapplicationsrequiringtwoRFphase-lockedloops.

A64/65ora128/http://www.77cn.com.cningaproprietarydigitalphaselockedlooptechnique,theLMX2335UandLMX2336Udevicesgenerateverystable,lownoisecontrolsignalsfortheRFvoltagecontrolledoscillators.BothRFsynthesizersincludeatwo-levelprogrammablechargepump.TheRF1synthesizerhasdedicatedFastlockcircuitry.

Serialdataistransferredtothedevicesviaathreewireinterface(Data,LE,Clock).Supplyvoltagesfrom2.7Vto5.5Varesupported.TheLMX2335UandtheLMX2336Ufeatureverylowcurrentconsumption:

LMX2335U(1.2GHz)–3.0mA,LMX2336U(2.0GHz)–3.5mAat3.0V.

TheLMX2335Udeviceisavailablein16-pinTSSOP,and16-pinChipScalePackage(CSP)surfacemountplasticpackages.TheLMX2336Udeviceisavailablein20-PinTSSOP,24-PinCSP,and20-PinUTCSPsurfacemountplasticpackages.

Features

nUltraLowCurrentConsumption

nUpgradeandCompatibletotheLMX2335LandLMX2336Ldevicesn2.7Vto5.5Voperation

nSelectableSynchronousorAsynchronousPowerdownMode:

ICC-PWDN=1µAtypicalat3.0VnSelectableDualModulusPrescalerRF1:64/65or128/129RF2:64/65or128/129

nSelectableChargePumpTRI-STATE®ModenProgrammableChargePumpCurrentLevelsRF1andRF2:0.95or3.8mA

nSelectableFastlock ModefortheRF1SynthesizernPush-PullAnalogLockDetectMode

nLMX2335Uisavailablein16-PinTSSOPand16-PinCSP

nLMX2336Uisavailablein20-PinTSSOP,24-PinCSP,and20-PinUTCSP

Applications

nMobileHandsets

(GSM,GPRS,W-CDMA,CDMA,PCS,AMPS,PDC,DCS)

nCordlessHandsets(DECT,DCT)nWirelessDatanCableTVTuners

ThinShrinkSmallOutlinePackage(MTC16)ThinShrinkSmallOutlinePackage(MTC20)

10136787

10136780

ChipScalePackage(SLB16A)ChipScalePackage(SLB24A)

UltraThinChipScalePackage

(SLE20A)

10136795

10136788

10136781

TRI-STATE®isaregisteredtrademarkofNationalSemiconductorCorporation.

Fastlock ,MICROWIRE andPLLatinum aretrademarksofNationalSemiconductorCorporation.

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LMX2335U/L

LMX2336UFunctionalBlockDiagram

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LMX2335UThinShrinkSmallOutlinePackage(TM)

(TopView)LMX2335UChipScalePackage(SLB)

(TopView)

10136702

10136738

LMX2336UThinShrinkSmallOutlinePackage(TM)

(TopView)LMX2336UChipScalePackage(SLB)

(TopView)

10136703

10136736

LMX2336UUltraThinChipScalePackage(SLE)

(TopView)

10136796

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LMX2335U/L

PinNo.PinNo.PinNo.

PinLMX2336ULMX2336ULMX2336UName20-Pin20-Pin24-Pin

UTCSPTSSOPCSPVCC

20

1

24

PinNo.

LMX2335U16-PinTSSOP

1

PinNo.LMX2335U16-PinCSP

16

I/ODescription

–

PowersupplybiasfortheRF1PLLanalodigitalcircuits.VCCmayrangefrom2.7V5.5V.Bypasscapacitorsshouldbeplacecloseaspossibletothispinandbeconndirectlytothegroundplane.

VPRF1DoRF1GND

12

23

23

23

12

–O

RF1PLLchargepumppowersupply.MuVCC.

RF1PLLchargepumpoutput.Theoutpuconnectedtotheexternalloopfilter,whictheinputoftheVCO.

34443–

LMX2335U:GroundfortheRF1PLLanadigitalcircuits.

LMX2336U:GroundfortheRF1PLLdigcircuitry.

fINRF1INRF1

45

56

56

5X

4X

II

RF1PLLprescalerinput.SmallsignalintheVCO.

LMX2335U:Don’tcare.

LMX2336U:RF1PLLprescalercompleminput.Forsingleendedoperation,thispibeACgrounded.TheLMX2336URF1Pbedrivendifferentiallywhenthebypasscapacitorisomitted.

GND677XX–

LMX2335U:Don’tcare.

LMX2336U:GroundfortheRF1PLLanacircuitry.

OSCin

78865I

Oscillatorinput.IthasanapproximateVinputthresholdandcanbedrivenfromaexternalCMOSorTTLlogicgate.

OSCout

891076O

Oscillatoroutput.Thisoutputisconnectedirectlytoacrystal.IfaTCXOisused,itopen.

FoLD

9101187O

Programmablemultiplexedoutputpin.FuasageneralpurposeCMOSTRI-STATERF1/RF2PLLpush-pullanaloglockdeteoutput,NandRdivideroutput,orFastlooutput,whichconnectsaparallelresistorexternalloopfilter.

Clock10111298I

MICROWIREClockinput.HighimpedanCMOSinput.Dataisclockedintothe22registerontherisingedgeofClock.

Data111214109I

MICROWIREDatainput.HighimpedancCMOSinput.Binaryserialdata.TheMSDataisenteredfirst.Thelasttwobitsarcontrolbits.

LE1213151110I

MICROWIRELatchEnableinput.HighimpedanceCMOSinput.WhenLEtransHIGH,Datastoredintheshiftregistersiintooneof4internalcontrolregisters.

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PinNo.PinNo.PinNo.

PinLMX2336ULMX2336ULMX2336UName20-Pin20-Pin24-Pin

UTCSPTSSOPCSPGND

13

14

16

PinNo.

LMX2335U16-PinTSSOP

X

PinNo.LMX2335U16-PinCSP

X

I/ODescription

–

LMX2335U:Don’tcare.

LMX2336U:GroundfortheRF2PLLanalogcircuitry.

LMX2335U:Don’tcare.

LMX2336U:RF2PLLprescalercomplementaryinput.Forsingleendedoperation,thispinshouldbeACgrounded.TheLMX2336URF2PLLcanbedrivendifferentiallywhenthebypasscapacitorisomitted.

RF2PLLprescalerinput.SmallsignalinputfromtheVCO.

LMX2335U:GroundfortheRF2PLLanaloganddigitalcircuits,MICROWIRE,FoLDandoscillatorcircuits.LMX2336U:GroundfortheRF2PLLdigitalcircuitry,MICROWIRE,FoLDandoscillatorcircuits.

RF2PLLchargepumpoutput.Theoutputis

connectedtotheexternalloopfilter,whichdrivestheinputoftheVCO.

RF2PLLchargepumppowersupply.Mustbe≥VCC.

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