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SN74LVC541PWAR SN74LVC541PWLE SN74LVC543A SN74LVC543ADBR SN74LVC543ADBRE4 SN74LVC543ADBRG4 SN74LVC543ADW SN74LVC543ADWE4 SN74LVC543ADWG4 SN74LVC543ADWR