Is a decoupling capacitor required on the power supply pins of the IC?

There are two types of decoupling capacitors: ceramic capacitors, which filter high-frequency noise, and electrolytic capacitors, which filter low-frequency noise. The ceramic capacitor should be placed close to the IC (refer to the figure below). Placing it at a distance from the IC not only reduces the effectiveness of filtering high-frequency noise due to the impedance of the wiring but may also cause the IC’s switching noise to be radiated. The capacitance value of the capacitor varies depending on the product, therefore, please refer to the application note of the product.

By adding a decoupling capacitor, a stable voltage with minimal noise can be supplied from the power supply to IC.