Integrated circuit package and pin identification.txt...
Packaging and pin identification of integrated circuits
1. Packaging of integrated circuits
The packaging form of integrated circuit includes circular metal package flat ceramic package double row straight insert plastic package. One-way analog integrated circuits often use circular metal packaging. Digital integrated circuits often use double-row straight insert plastic packaging and flat.
Flat ceramic integrated circuits are used in power devices.
2. Pin identification of integrated circuits
Before using the integrated circuit, we must carefully identify the pin of the integrated circuit, consult the manual, confirm the function and use method of each pin, so as not to damage the device because of the wrong connection. The general rules of pin arrangement of integrated circuits are as follows.
Round packaging (mostly metal case). There are more than 3, 5, 8, 10 kinds of pins. When you identify the pins, the pins will be upward and their marks will be found, such as the locking orifice ear, the positioning holes and the uneven arrangement of the pins, etc. The pin order starts with the positioning marker, and the pin is arranged clockwise, 1. 23.
Single-row straight-in package. For single row straight insert integrated circuit, the pin should be recognized with the pin facing down, facing the model or positioning mark, starting from the number of pins in the positioning marking side, in turn 123.The common positioning mark for this type of integrated circuit is Bit marks for color spot pits, holes, lines, ribbons, missing angles, etc.
3) double-column straight-in package. For double-column direct-inserted integrated circuits,
The pin should be identified with the pin facing down, the model, the trademark upward, and the positioning mark (such as a dot or notch) on the left, the first from the lower left corner
The starting of the pin and the counterclockwise direction of the pin were 1.2 and 3respectively.
