The concept of truth and falsehood should be clarified. First, it says LM39 15, which actually can't realize the function. This is fake. Second, it can be used, but the reliability is not good and the quality is poor; Third, the chip is real, and the well-known trademarks outside are fake, fake.

As far as integrated circuits are concerned, they belong to high-tech products and need high-tech equipment to manufacture. If the integrated circuit you bought works, it's not fake, at most.