TC74VHC240FEL TC74VHC240F-ELF TC74VHC240FK TC74VHC240FK EL TC74VHC240FK EL,K TC74VHC240FK(EL,K) TC74VHC240FK(ELK) TC74VHC240FS TC74VHC240FS(EL) TC74VHC240FS-EL