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Pin identification of integrated circuits
1) Single in-line
There are many specific shapes of the package of the single in-line integrated circuit, but there is a more obvious mark to indicate the position of the first pin, and it is ordered from left to right. If there is no first pin mark, turn the side with the model number towards you, and the pins face down. The leftmost end is the first pin, followed by each pin in turn 2) Dual in-line
The dual-in-line integrated circuit also has a more obvious mark to indicate the position of the first pin, and it is ordered counterclockwise along the outer edge of the integrated circuit. If there is no first pin mark, place the side with the model number facing you, and the pins are facing down. |
