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SN74LVC540ADGVRG4 SN74LVC540ADW SN74LVC540ADWE4 SN74LVC540ADWG4 SN74LVC540ADWR SN74LVC540ADWRE4 SN74LVC540ADWRG4 SN74LVC540A-EP SN74LVC540ANS SN74LVC540ANSR