AL422b

AL422DataSheets(RevisionV1.1)AL422AL422BJanuary23,20012Amendments(SinceApril2,1999)05-13-99DC/ACcharacteristics(includingcurrentconsumption)updated.07-02-99Pinoutdiagram(5.0)andDCexternalload(7.4)modified.08-03-99DescriptionaboutTSTpinaddedinsections6.0&8.1.09-02-998.3.2rewritten.10-26-99CapacitanceprovidedintheACcharacteristicssection.12-15-99RemoveTSTpinrestriction.01-18-011.Revisedsection“8.3.2ReadEnableduringResetCycles”to“8.3.2TheProperManipulationofFIFOAccess”.2.Addsection“8.3.3SingleFieldWritewithMultipleReadOperation”3.Addsection“8.3.4OneFieldDelayLine(TheOldDataRead)”AL422AL422BJanuary23,20013AL4223M-BitsFIFOFieldMemoryContents:1.0Description________________________________________________________________42.0Features___________________________________________________________________43.0Applications________________________________________________________________44.0OrderingInformation________________________________________________________45.0PinoutDiagram____________________________________________________________56.0PinDescription_____________________________________________________________57.0ElectricalCharacteristics_____________________________________________________67.1AbsoluteMaximumRatings________________________________________________________67.2RecommendedOperatingConditions________________________________________________67.3DCCharacteristics_______________________________________________________________67.4ACCharacteristics_______________________________________________________________77.5TimingDiagrams_________________________________________________________________98.0FunctionalDescription______________________________________________________138.1MemoryOperation______________________________________________________________148.25Vand3.3Vapplications_________________________________________________________158.3ApplicationNotes_______________________________________________________________168.3.1IrregularRead/Write_________________________________________________________________168.3.2TheProperManipulationofFIFOAccess_________________________________________________178.3.3SingleFieldWritewithMultipleReadOperation___________________________________________178.3.4OneFieldDelayLine(TheOldDataRead)_______________________________________________179.0MechanicalDrawing_______________________________________________________19AL422AL422BJanuary23,200141.0DescriptionTheAL422consistsof3M-bitsofDRAM,andisconfiguredas393,216wordsx8bitFIFO(firstinfirstout).Theinterfaceisveryuser-friendlysinceallcomplicatedDRAMoperationsarealreadymanagedbytheinternalDRAMcontroller.Currentsourcesofsimilarmemory(fieldmemory)inthemarketprovidelimitedmemorysizewhichisonlyenoughforholdingoneTVfield,butnotenoughtoholdawholePCvideoframewhichnormallycontains640x480or720x480bytes.TheAverLogicAL422provides50%morememorytosupporthighresolutionfordigitalPCgraphicsorvideoapplications.The50%increaseinspeedalsoexpandstherangeofapplications.2.0Features•384K(393,216)x8bitsFIFOorganization•SupportVGA,CCIR,NTSC,PALandHDTVresolutions•Independentread/writeoperations(differentI/Odataratesacceptable)•Highspeedasynchronousserialaccess•Read/writecycletime:20ns•Accesstime:15ns•Outputenablecontrol(dataskipping)•Selfrefresh•5Vor3.3Vpowersupply•Standard28-pinSOPpackage3.0Applications•Multimediasystems•Videocapturesystems•Videoeditingsystems•Scanrateconverters•TV’spictureinpicturefeature•Timebasecorrection(TBC)•Framesynchronizer•Digitalvideocamera•Bufferforcommunicationssystems4.0OrderingInformationPartnumberPackagePowerSupplyStatusAL422B28-pinplasticSOP+5/+3.3voltShippingAL422V528-pinplasticSOP+5voltReplacedbyAL422BAL422V328-pinplasticSOP+3.3voltReplacedbyAL422BAL422AL422BJanuary23,200155.0PinoutDiagram6.0PinDescriptionPinnamePin#I/OtypeFunctionDI0~DI71~4,11~14inputDatainputWCK9InputWriteclock/WE5Input(activelow)Writeenable/WRST8Input(activelow)WriteresetDO0~DO715~18,25~28Output(tristate)DataoutputRCK20InputReadclock/RE24Input(activelow)Readenable/RRST21Input(activelow)Readreset/OE22Input(activelow)OutputenableTST7InputTestpin(pulled-down)*VDD105Vor3.3VDEC/VDD19DecouplingcapinputGND6,23Ground12345678910111213142827262524232221201918171615DI0DI1DI2DI3/WEGNDTST/WRSTWCKVDDDI4DI5DI6DI7DO0DO1DO2DO3/REGND/OE/RRSTRCKDECDO4DO5DO6DO7AL422-04422BpinoutdiagramAVERLOGICAL422BXXXXXXXXXLotNumberDateCodeAL422AL422BJanuary23,200167.0ElectricalCharacteristics7.1AbsoluteMaximumRatingsRatingsParameter3.3Vapplication5VapplicationUnitVDDSupplyVoltage-1.0~+4.5-1.0~+7.0VVPPinVoltage-1.0~+5.5-1.0~VDD+0.5VIOOutputCurrent-20~+20-20~+20mATAMBAmbientOp.Temperature0~+700~+70°CTstgStoragetemperature-55~+125-55~+125°C7.2RecommendedOperatingConditions3.3Vapplication5VapplicationParameterMinMaxMinMaxUnitVDDSupplyVoltage+3.0+3.6+4.5+5.25VVIHHighLevelInputVoltage+2.0+5.5+3.0VDD+0.5VVILLowLevelInputVoltage-1.0+0.8-1.0+0.8V7.3DCCharacteristics(VDD=5Vor3.3V,Vss=0V.TAMB=0to70°C)3.3Vapplication5VapplicationParameterMinTypMaxMinTypMaxUnitIDDOperatingCurrent@20MHz-33--50-mAIDDOperatingCurr