TC74VHC163FT TC74VHC163FT(EL) TC74VHC163FT(EL,K) TC74VHC163FT(ELK) TC74VHC163FT(ELK,M) TC74VHC163FT(ELM) TC74VHC163FT-EL TC74VHC163FT-ELK(M) TC74VHC164 TC74VHC164F