TC74VHC541FK(EKJ) TC74VHC541FK(EL,K TC74VHC541FK(EL,K) TC74VHC541FK(ELK) TC74VHC541FK-ELK TC74VHC541FR TC74VHC541FS TC74VHC541FS(EL) TC74VHC541FT TC74VHC541FT(EKJ)