First, although the quality of agents is good, the quantity is too small, and they are generally unwilling to talk to you. Unless it is in stock, you can pick it up. If you order futures, the minimum order quantity may not be reached, and the delivery time may be too long for you to accept. It is not easy to apply for samples unless you apply on the brand's website yourself. Information about the brand can be found on the website of Anteling Technology, or you can go directly to the retail department to purchase goods. If the goods on the market are mixed, we must learn to distinguish the authenticity of IC.

A old chip: after the chip is removed from the circuit board, it is processed, and the pins are obviously soldered, and the pin spacing is obviously unequal. The size, font and depth of printed words and patterns on the surface are different, and the production batch number is generally different. The origin mark on the back is miscellaneous (unprocessed): refurbished chips are one kind.

Much like a brand-new film, there is basically no obvious difference in size, font and depth between the text and pattern printed on the surface, and the batch number is the same. However, if you carefully observe the surface of the chip, you will find that there are many tiny parallel scratches, and the origin marks on the back are different. The stitches are generally dull, but dull, with traces of oxidation, and the stitch spacing is relatively consistent. Generally speaking, the polishing film is mainly a brand-new film that has been placed for a long time, or the batch number is relatively miscellaneous. For the convenience of customers, they are polished and printed into a unified, relatively new production batch number and new packaging.

B scattered new chips: the size, font and depth of printed words and patterns on the chip surface are different, and the production batch number is generally different. The label on the back is miscellaneous, but the pin has no traces of use, but there are traces of oxidation (some have the same batch number, and there is no original packaging. Now there are also repackaged manufacturers on the market, which is difficult for professionals to identify. Generally speaking, this kind of chips is the unused chips collected by traders from various channels and re-flowed to the market!

C original chip: the size, font, depth and production batch number of the words and patterns printed on the chip surface are consistent, the labels on the back of the chip are neat, there will be bright hate in the middle of the frosted surface, and the words on the chip are new, transparent and not yellow. The packaging is more formal. Generally, the label on the package will have the manufacturer's verification information or the agent's order code. Sometimes you can check the authenticity on the manufacturer's website according to the bar codes of these labels. ) Summarize the above three kinds of chips: A has the worst quality and stability, B has the second quality and stability, and C is your best choice! If your quality comes first and your cost comes second, you can buy it directly from the agent. If necessary, stop production, there are no original products on the market. Then you can only choose the second!