The English abbreviation for integrated circuit IC (integrate circuit), the symbol in the circuit: U. It is a microelectronic device or component. Using a certain process, the transistors, diodes, resistors, capacitors and inductors required in a circuit and the wiring interconnection are made together on a small piece or pieces of semiconductor wafer or dielectric substrate, and then packaged in a tube Inside the shell, it becomes a miniature structure with the required circuit function; the integrated circuit has the advantages of small size, light weight, few lead wires and solder joints, long life, high reliability, good performance, etc. At the same time, the cost is low and it is convenient for mass production.

Integrated circuit detection. Commonly used detection methods for integrated circuits include on-line measurement method, off-line measurement method and substitution method.

Non-online measurement The non-online measurement tide is measured when the integrated circuit is not soldered into the circuit, and the DC resistance value between each pin of the integrated circuit is measured and compared with the DC resistance value of each pin of the known normal integrated circuit of the same model to determine Is it normal.

Online measurement The online measurement method uses the voltage measurement method, the resistance measurement method, and the current measurement method to determine whether the integrated circuit is damaged by measuring the voltage, resistance, and current values ??of each pin of the integrated circuit on the circuit.

Substitution method The substitution method is to replace the integrated circuit under test with an integrated circuit of the same type and specification with a known good condition, and it can be judged whether the integrated circuit is damaged.

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