Chip damage has always been a headache, so which chips are easy to damage? Those chips that need 5V working voltage, such as 74 series digital circuits, single-chip computers, memories, etc. There are strict requirements for power supply voltage. Above 5.5V or below 4.5V may cause them to be damaged. So, what is the reason for the chip damage? Let's have a look.

Power supply problem

Due to design defects or incorrect termination of power supply and other functional pins, the chip may be burned. Therefore, attention should be paid to the connection of power supply when designing to ensure the correct interface at the pin end.

Welding problem

It is easy to connect legs when welding by hand, and the soldering iron may be damaged if it stays too long. In order to prevent this, more flux can be added and the residence time of soldering iron can be reduced.

Test link

If the power supply is accidentally short-circuited with the functional pin of the running chip during the test, the chip will also be damaged. So make sure the connection is correct and the contact is reliable before continuing.

Power drive problem

Using IO pin directly for power driving, such as connecting IO port directly to a small motor, may also lead to chip damage. Therefore, we should pay attention to the way of power drive, and avoid directly driving high-power equipment such as motors with IO ports.

counter-measure

In order to protect the chip, we need to pay attention to the connection of power supply, the quality of welding, the connection during testing and the way of power supply driving. Only in this way can chip damage be effectively prevented.