SN74LVC543 SN74LVC540A SN74LVC540A-EP SN74LVC540A-Q1 SN74LVC541A SN74LVC541A-EP SN74LVC541A-Q1 SN74LVC543A SN74LVC573 SN74LVC573A SN74LVC573A-EP SN74LVC573A-Q1 SN74LVC574A SN74LVC574A-EP SN74LVC574A-Q1