Chinese F-91W homage quartz watch : weekend die-shot

Chinese F-91W quartz watch is very similar to Casio F-91W, but fortunately does not misuse Casio trademark. Chip is 4 times smaller in Chinese version, it looks simpler, purely digital.

PCB is optimized for cost to an extreme : everything that can be integrated is integrated. There is not even a decoupling capacitor which is probably ok for digital circuits with low slew rate.

Die size 1384x1245 µm.