Integrated Circuits Used 74LS153 Procedure Add IC 74LS153 into ICBase-1 (74LS153).Connect Output-9 to Pin-7 (Output) of ICBase-1 (74LS153).Connect Input-12 to Pin-2 (Input) of ICBase-1 (74LS153).Connect VCC Port to Pin-16 (Input) of ICBase-1 (74LS153).