To ensure high reliability, a new packaging method Tape and Reel is used. Into the part body are injected 14 pins. The datasheets for the 14 pins explain the functions.
TC74VHCT00AFT(EL,K Features
TC74VHCT00AFT(EL,K Applications
There are a lot of Toshiba TC74VHCT00AFT(EL,K Gates and Inverters applications.