1Features TheMC44BS373CAisamulti-standard,PAL/SECAM/NTSCmodulator. Thechannelissetbyanon-chiphigh-speedI2C-compatiblebusreceiver.Aphase-lockedloop(PLL)tunes themodulatoroverthefullUHFrange. ThemodulatorincorporatesasoundsubcarrieroscillatorandusesasecondPLLtoderive4.5-,5.5-,6.0-, and6.5-MHzsubcarrierfrequencies.Thesefrequenciesareselectablebybus. Themodulationstandardcanbechosenusingacontrolbitthatselectsbetweenpositiveandnegative modulation. Thepicture-to-soundratiomaybeadjustedusingthebus.Inaddition,anon-chipvideotestpatterngenerator canbeswitchedonwitha1-kHzaudiotestsignal. TheMC44BS373CAalsohasthefollowingfeatures: •Integratedon-chipprogrammableUHFoscillator •Noexternalvaricapsdiodes/inductorortunedcomponents •Extremelylowexternalcomponentcount •Channel21–69UHFoperation •VHFrangepossiblebyinternaldividers(30–450MHz) •BoostedTVOUTlevel(82dBμVtypical) •High-speedreadandwriteI2Cbuscompatible(800kHz) •I2Caddressselectablebypin(fourchoices)usingexternalresistor(availableonlyinQFN20 package) •I2Cbus5-and3.3-Vcompatible •Fixedvideomodulationdepth(93%typicalinsystemLand82%typicalintheotherstandards) •Peakwhiteclipdisabledbybus •Programmablepicture/soundcarrierratio(12and16dB) •Integratedon-chipprogrammablesoundsubcarrieroscillator(4.5,5.5,6.0and6.5MHz)—no externalvaricaps •Programmablesoundreferencefrequency(31.25and62.5kHz) •DirectRFsoundmodulatorinput(FMandAMmodulatorbypassed)forNICAMorstereosound applications(availableonlyinQFN20package) •On-chipvideotestpatterngeneratorwithsoundtestsignal(1kHz) •Low-powerprogrammablemodulatorstandbymode •TransientoutputinhibitduringPLLlock-upatpower-on •Logicaloutputportcontrolledbybus •ESDprotection,minimum4KV 我公司以下产品也有大量现货: USBMULTILINKBDME*****MC908AP32CFBER*****MC908JL8CPE MC68HC908QT4ACDW*****MC68S711E9CFN2*****MC705C8ACPE MC68HC908QT1AMDW*****MC68HC908QY4CP*****MAX187CCWE+ MC68HC908QT1ACDW*****MC68HC908JL8CP*****LM2904DMR2G MC68HC908MR32CFU*****MC68HC705SR3CP*****ADF7021BCPZ MC68HC908LK24CFQ*****MC68HC705J1ACP*****ADF7020BCPZ MC68HC908KX8MDWE*****MC68HC705C8ACP*****NCP1200P60 MC68HC908JL8CSPE*****MC68HC11F1CFN4*****MRF1550NT1 MC68HC908JL8CFAE*****MC56F8356VFV60*****MRF1535NT1 MC68HC908JK8CDWE*****MC44BS373CADR2*****MRF1513NT1 MC68HC908GT16CFB*****M68CYCLONEPROE*****MMA7455LR2 MC68HC908AP48CFB*****CY7C63723C-SXC*****MMA7455LR1 MC68HC908AP32CFB*****XPC850SRZT50B*****MMA7360LR2 MC68HC908AP32CFA*****XPC850DEZT50B*****MMA7360LR1 MC68HC908AB32CFU*****TLK2201BRCPG4*****MMA7260QR2 MC44BS374T1AEFR2*****MC9S08QG8CFFE*****MM1414CVBE AD8185ARUZ-REEL7*****MC9S08QG8CDTE*****MHPA18010N USBMULTILINKBDM*****MC9S08QG4CDTE*****MC9RS08KA8 USBMULTILINK08E*****MC9RS08KA8CWJ*****MC33594FTA PALCE16V8Z-25PC*****MC9RS08KA2CSC*****MC33591FTA MCHC908QT2MDWER*****MC9RS08KA2CPC*****MAX7452ESA 封装：MC44BS373CAEFMC44BS373CA 批号：FREESCALE 厂家：08+ 型号：SOIC16