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Examining a vintage RAM chip, I find a counterfeit with an entirely different die inside

Posted on Friday, August 25th, 2017 in Chips, reversed by DP

picture-die-structures

Ken Shirriff writes, “A die photo of a vintage 64-bit TTL RAM chip came up on Twitter recently, but the more I examined the photo the more puzzled I became. The chip didn’t look at all like a RAM chip or even a TTL chip, and in fact appeared partially analog. By studying the chip’s circuitry closely, I discovered that this RAM chip was counterfeit and had an entirely different die inside. In this article, I explain how I analyzed the die photos and figured out what it really was.”

See the full post on his blog.

This entry was posted on Friday, August 25th, 2017 at 8:07 pm and is filed under Chips, reversed. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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