Greetings and welcome to today's #nakeddiefriday installment.

Today's guest is a smartcard chip, for which I do not know the actual p/n -- only it's die marking: M7690-G1, by Infineon. This came from a SIM card. The chip had polyimide on top which had to be stripped off, hence the damage on some top metal.

Unfortunately, power distribution routing and CMP dummy fill obstructs the majority of the detail. 🧵

#electronics #reverseengineering #icre #smartcard

Hello! It has been a little while, but #nakeddiefriday is back in town.

Today's exhibit is an old PIC1650A. Yes, one of *the* PIC series of microcontrollers. Note it was designed by General Instrument in 1980. It was fabbed in a single metal layer, metal-gate NMOS process. The image is about 4.3x3.8 mm.

No full-res link as SP is still borked.

#electronics #reverseengineering #icre

As I will be travelling starting tomorrow, I declare the #nakeddiefriday today.

Instead of going deeper into one particular die, this will be several of them but one-pagers.

This one is HV9911 by Supertex (now owned by Microchip). Those following me have probably seen the epic struggle with restoring a diving light; this one came from the LED driver chip in the light. Entirely undamaged, as far as I can tell. Of particular interest is an array of fuses in the top right corner.

#electronics #reverseengineering #icre

Hello and welcome to the second installment of #nakeddiefriday in this new year!

Today's image is of a M37620E8FP, a Mitsubishi microcontroller. This should be one from "group 7620" but I did not find a datasheet for this one. Custom markings on the package likely identify the ROM and its version.

Full-res pano: https://siliconprawn.org/map/mitsubishi/m37620m8-/infosecdj_mz_nikpa40x_50p/

Many thanks to @RueNahcMohr for supplying this sample!

#electronics #reverseengineering #icre

Happy belated #nakeddiefriday to you all!

Here is one for this week; a mask ROM with p/n MSM531001B (as marked on the die) by OKI. It stores 1 Mb and has the standard pinout. Manufactured in a 1-metal 1-poly process.

Many thanks to @RueNahcMohr for supplying this sample!

#electronics #reverseengineering #icre

It is #nakeddiefriday if I say so, so here is another naked die for your viewing pleasure.

This is IR2137 from International Rectifier Inc. It's a "high voltage, high speed 3-phase IGBT driver best suited for AC motor drive applications." One can clearly see a lot of circuitry triplicated on this die. Also, a very funny wheelies.

Many thanks to @RueNahcMohr for supplying this sample!

#electronics #reverseengineering #icre

Which pad is which? #BSBACM edition.
First we trace out the power pads...

There are 52 bond pads and 48 pins, so 4 of those pads need to double up...

#ICRE #ICReverseEngineering #NakedDieFriday