One chip integrates two four-option switches. The analog switch mainly completes the signal switching function in the signal link. The signal link is closed or opened by MOS tube switching mode. Because its function is similar to a switch, it is realized by the characteristics of the simulator and becomes an analog switch. The analog switch in the electronic equipment mainly plays the role of connecting the signal or disconnecting the signal. Analog switches have been widely used in automatic control systems and computers because of their low power consumption, high speed, no mechanical contacts, small size and long service life.