Post B5Pet8RKBMy2cr3sDA by infosecdj@infosec.exchange
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 (DIR) Post #B5Pet7f74cP2DKVN44 by infosecdj@infosec.exchange
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       Hi! A little bit late in the day, but #nakeddiefriday is still happening today.And today's exhibit is TC8568AM by Toshiba. This is a VFO to be used in floppy disk controllers. This is made very prominent on the die itself. Interesting how such a discrete part was still made in early 90s, where I kind of expected them to be replaced by fully integrated parts. A really short thread will follow.Full-res map: http://infosecdj.net/map/toshiba/tc8568am/infosecdj_mz_nikpa40x_66p/Many thanks to @RueNahcMohr for supplying this sample!#electronics #reverseengineering #microscopy
       
 (DIR) Post #B5Pet8RKBMy2cr3sDA by infosecdj@infosec.exchange
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       In the bottom left corner we have what looks like a die ID (D930 0001A) along with e-test features. These are two transistors with a common gate wire, which apparently has an ESD protection diode as well.
       
 (DIR) Post #B5PetANUyZ5ydZHqWe by infosecdj@infosec.exchange
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       At the bottom of the die are several pieces of special CMOS circuitry, I suspect this is where the VCO lives. Several prominent capacitor structures can be seen, formed between the poly layer and the substrate.
       
 (DIR) Post #B5PetApVIRUs2QODB2 by infosecdj@infosec.exchange
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       The standard cell library used elsewhere on the die looks rather unusual; both poly and diffusion features make large excursions outside power distribution rails.At the top of the snippet is what looks like an autorouter bug.
       
 (DIR) Post #B5PetBGRgH31NyzjAe by infosecdj@infosec.exchange
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       The crystal oscillator circuitry is stuck between two I/O blocks and covered by metal-2.
       
 (DIR) Post #B5PetBinypjUnwGNNI by infosecdj@infosec.exchange
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       This was a rather welcome diversion from the long-running deprocessing project, with large devices and perfectly readable cells. I hope you enjoyed looking at it as much as I did.And that'd be it for the day. Just wanted to remind that I am always happy to accept donations in any way or form, whether of samples, materials for processing them, or simply a fiver a month. All the links are in my profile.I wish you all a nice rest of this Friday and an amazing weekend to go with it. Until next time!