Livestream: Reverse engineering two TTL chips
Channel: Robert Baruch
Date: 25/08/2018

I will reverse engineer two TTL chips from their die images: A Texas Instruments 5490 from 1975 and a Stewart-Warner 7490 from 1971. These are decade counters.

I use a Wacom Cintiq 27QHD pen/touch display and Inkscape to draw the features, then label them and extract the schematics.

You can see the images here:
TI 5490: https://project5474.org/index.php?title=5490_TI_7536
SW 7490: https://project5474.org/index.php?title=7490_SW_7142

Patreon me? https://www.patreon.com/user?u=3190442