TC74VHC244F-EL(F) TC74VHC244FFS TC74VHC244FK TC74VHC244FK VSSOP20 TC74VHC244FK(EL,K) TC74VHC244FK(ELK) TC74VHC244FK(ELPPK) TC74VHC244FK-ELK TC74VHC244FK-ELK(M TC74VHC244FK-ELKM