TC74LCX574FELF TC74LCX574FK TC74LCX574FK(ELK) TC74LCX574FT TC74LCX574FT(EL) TC74LCX574FT(EL)PB TC74LCX574FT(EL,M) TC74LCX574FT(EL.K) TC74LCX574FT(ELK) TC74LCX574FT(ELK,M)