TC74VHC163F(K,F) TC74VHC163F-EL TC74VHC163FK TC74VHC163FN TC74VHC163FS TC74VHC163FT TC74VHC163FT(EL) TC74VHC163FT(EL,K) TC74VHC163FT(ELK) TC74VHC163FT(ELK,M)