Reverse engineering a counterfeit (?) 7805 voltage regulator

This article illustrates how difficult it can be for someone other than the original component manufacturer to authenticate parts. …

Reverse engineering a counterfeit 7805 voltage regulator

The author explains how a specific microcircuit chip works, including a description of the operation of transistors contained in the chip. As the author explored the chip design, he found reasons to suspect the chip was counterfeit and produced by someone other than the OCM indicated by the marking on the device. Later, however, the author learned that his conclusion was likely incorrect.

Lesson: In the absence of authentication support from the OCM, expertise in electronic part forensics and research is necessary to determine counterfeits from authentic electronic parts.

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One thought on “Reverse engineering a counterfeit (?) 7805 voltage regulator

  1. Mary Lockhart says:

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    If you follow the link to Dissenting Opinion which goes to a reddit thread, another individual produces old datasheets and demonstrates that this is an authentic component. Very very useful benchmark to the difficulty of verifying old components without original documentation, also the converse. There’s a very high rate of false signals which brings to mind just how expensive all this testing and verifying is going to be…

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