Hello, the chip power supply foot identification methods are usually the following:
1. View the data manual: the data manual of the chip usually has the identification of the power supply foot and electrical characteristics parameters. You can determine the power supply foot by viewing the manual.
2. Observe the chip package: Different packages of chips, the position and number of power supply feet are different, you can determine the power supply feet by observing the chip package.
3. Use multimeter test: Through the resistance test function of the multimeter, the power supply pin of the chip can be determined, because the power supply pin is usually connected to the ground pin of the chip (GND).
4. Oscilloscope test: By observing the working waveform of the chip through the oscilloscope, the power supply foot of the chip can be determined, because the level change of the power supply foot will affect the working waveform of the chip.
There are several methods for pin identification of integrated circuits :1, look at the chip's notch, where there is a notch or miter cut, indicating the chip's first pin, and then count the pins counterclockwise.
2, look at the points on the chip screen, there will be a small point on the chip, indicating the first pin, and then the number of pins counterclockwise.
3, let the letters and numbers of the chip face themselves, the first pin in the lower left corner is the first pin of the chip, and then the number of counterclockwise is the other pins of the chip.
The chip power supply pin is not guessed can only look at the chip pin function diagram.