A typical microcomputer system, through the power line, input line, output line to enter various interference or transient voltage, may cause the microcomputer to malfunction, especially from the switching power supply, the motor near the microcomputer on and off, AC power Voltage surges and transients, electrostatic discharges, etc. can cause malfunctions in the system and can damage the device in severe cases. Connecting the transient voltage suppression diode to the power line input and output lines of the microcomputer can prevent the transient voltage from entering the "microcomputer" bus, strengthen the resistance of the microcomputer to external interference, ensure the normal operation of the microcomputer, and improve its application reliability. The amount of TVS tubes used is a lot.
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