TC74VHC4051AF(EK,F TC74VHC4051AF(K,F) TC74VHC4051AFK TC74VHC4051AFK(E,K TC74VHC4051AFK(E,K) TC74VHC4051AFK(EK TC74VHC4051AFK(EK) TC74VHC4051AFT TC74VHC4051AFT(E,K TC74VHC4051AFT(EK