Integrated Circuits Used 74LS153 Procedure Add IC 74LS153 into ICBase-1 (74LS153).Add IC 74LS153 into ICBase-2 (74LS153).Connect Pin-16 (Input) of ICBase-1 (74LS153) to VCC Port.Connect Pin-8 (Ground) of ICBase-1 (74LS153) to GND Port.