标签: 74ls90

74LS90.pdfDM74LS90DM74LS93DecadeandBinaryCountersJune1989DM74LS90DM74LS93DecadeandBinaryCountersGeneralDescriptionEachofthesemonolithiccounterscontainsfourmaster-countpulsesareappliedtoinputAandtheoutputsareasslaveflip-flopsandadditionalgatingtoprovideadivide-by-describedintheappropriatetruthtableAsymmetricaldi-twocounterandathree-stagebinarycounterforwhichthevide-by-tencountcanbeobtainedfromthe’LS90counterscountcyc……