Revealing the mystery of 0805 packaging size

In the field of electronic components, 0805 packaging is a common surface mount (SMT) packaging form. So, how did the 0805 package size come about? This article will unveil this mystery for you from the history, design principles, and practical applications of 0805 packaging

1、 0805 Packaging History

0805 packaging originated in the late 1970s, when integrated circuits (ICs) were developing towards miniaturization, high integration, and high performance. In order to meet these needs, the industry urgently needs a new form of packaging to achieve higher integration and smaller volume. So, 0805 packaging emerged, becoming the most popular packaging form at that time

2、 Design principle of 0805 packaging

The size of the 0805 package is 1.6mm x 0.8mm, which includes three pins: one front pin (VCC), one back pin (GND), and one side pin (data cable). These three pins correspond to the three functional areas of the integrated circuit: VCC power supply area, GND ground area, and data transmission area

When designing the 0805 package, the following aspects need to be considered:

1. Pin to pin spacing: In order to ensure sufficient electrical isolation between pins and facilitate welding and assembly, the spacing between pins should be controlled within a certain range. Generally speaking, the pin spacing should be greater than or equal to 3.2mm/0.8mm=4mm

2. Pin position: The pin position should be as close to the center of the package as possible to reduce the volume of the package and improve integration. At the same time, the position of the pins also needs to consider factors such as the layout of the PCB board and welding process

3. Size and shape of pads: Pads are key components that connect pins to the PCB board, so the size and shape of pads should match the actual size of the pins. Generally speaking, the diameter of the solder pad should be greater than or equal to 2.5 millimeters/0.8 millimeters=3.125 millimeters

3、 The practical application of 0805 packaging

Due to its small size and superior performance, the 0805 package has been widely used in electronic products. For example, it can be used to make micro audio, wireless modules, sensors and other components, as well as carriers for various integrated circuits. In addition, with the development of surface mount technology, the 0805 package can also be combined with other surface mount components to form complex circuit systems, meeting various application requirements