types of switch ICs are available, including basic logic gates, multiplexers, cross-couplers, analog switches, and digital multiplexers. Basic logic gates, like AND, OR and NOT, are simple ICs with two or more inputs and one output. They are useful for creating simple digital circuits. Multiplexers are ICs that allow multiple signals to be routed through a single output. Cross-couplers are ICs made up of two transistors connected in such a way that they can be used to perform logic operations, such as passing only high or low voltage levels through the circuit. Analog switches are ICs used to switch analog signals such as sine waves between an input and an output. Digital multiplexers are ICs that allow multiple digital signals to be routed to a single output.