Reverse engineering CMOS, illustrated with a vintage Soviet counter chip

Always a fun read, thank you so much!

The IC link (sorry, in Rissian):

https://www.microshemca.ru/M.K561IE11/

No questions, but big thanks, very interesting!

A little nitpick: > И indicates a digital circuit, while ИЕ is a counter

digital circuits were not only [И-], this prefix means arithmetic and register-based circuits. Because there were a lot more “digital” circuits starting with [Л-] (L- means Logic), [A-] for transmission gates and bus arbiters. [B-] for microprocessors and related stuff, [Р-] for memory, etc... The almost complete list can be found here: https://electronics.fandom.com/ru/wiki/%D0%9E%D0%B1%D0%BE%D0...