Integrated Circuits Used 74LS153 Procedure Add IC 74LS153 into ICBase-1 (74LS153).Connect VCC Port to Pin-20 (VCC) of ICBase-1 (74LS153).Connect Input-7 to Pin-18 (Input) of ICBase-1 (74LS153).Connect Output-9 to Pin-7 (Output) of ICBase-1 (74LS153).