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It's really fortunate that the history of the 555 timer is really well documented. Its inventor, Hans Camenzind, wrote several books, and even had a Youtube cha

by ajxs 1y ago

It's really fortunate that the history of the 555 timer is really well documented. Its inventor, Hans Camenzind, wrote several books, and even had a Youtube channel in his later years[1]. It's a shame that so many iconic chips that have changed the world aren't so well documented. I went down a real rabbithole a while ago trying to find in-depth information about the Hitachi HD44780. I couldn't even decisively pin down exactly what year it was first manufactured. It's interesting to think of microchip designs as a kind of artistic legacy: Chips like the 555 have had an enormous impact on modern history. 1: https://www.youtube.com/@hcamen https://www.youtube.com/@hcamen

userbinator 1y ago
I couldn't even decisively pin down exactly what year it was first manufactured Likely 1985. https://www.crystalfontz.com/blog/look-back-tech-history-hd44780-controller-data-sheet/ https://www.crystalfontz.com/blog/look-back-tech-history-hd4...
- ajxs 1y ago
  I did see this article when I was researching, but it's incorrect. You can find references to the HD44780 in earlier catalogs. The earliest reference I can find is 1981: https://archive.org/details/Hitachi-DotMarixLiquidCrystalDisplayControllerandDriverLCD-IIHD44780UsersManualOCR/page/n1/mode/2up https://archive.org/details/Hitachi-DotMarixLiquidCrystalDis... It's also referenced in this catalog from 1982: https://bitsavers.org/components/hitachi/_dataBooks/1982_Hitachi_Full_Line_Condensed_Catalog.pdf https://bitsavers.org/components/hitachi/_dataBooks/1982_Hit... Likely the first year of manufacture was 1981/82.
  - userbinator 1y ago
    That 1981 document says "preliminary", which suggests very limited trial production. Even the 1985 reference I found is "advance". First tape-out may have been earlier than that. Have you tried asking Hitachi (apparently now Renesas) about it? It's more likely that this information is available on the Japanese part of the internet.
- crb3 1y ago
  Try 1972; taped out in 1971. https://en.wikipedia.org/wiki/555_timer_IC https://en.wikipedia.org/wiki/555_timer_IC

by ajxs 1y ago

userbinator 1y ago

I couldn't even decisively pin down exactly what year it was first manufactured Likely 1985. https://www.crystalfontz.com/blog/look-back-tech-history-hd44780-controller-data-sheet/ https://www.crystalfontz.com/blog/look-back-tech-history-hd4...

ajxs 1y ago
I did see this article when I was researching, but it's incorrect. You can find references to the HD44780 in earlier catalogs. The earliest reference I can find is 1981: https://archive.org/details/Hitachi-DotMarixLiquidCrystalDisplayControllerandDriverLCD-IIHD44780UsersManualOCR/page/n1/mode/2up https://archive.org/details/Hitachi-DotMarixLiquidCrystalDis... It's also referenced in this catalog from 1982: https://bitsavers.org/components/hitachi/_dataBooks/1982_Hitachi_Full_Line_Condensed_Catalog.pdf https://bitsavers.org/components/hitachi/_dataBooks/1982_Hit... Likely the first year of manufacture was 1981/82.
- userbinator 1y ago
  That 1981 document says "preliminary", which suggests very limited trial production. Even the 1985 reference I found is "advance". First tape-out may have been earlier than that. Have you tried asking Hitachi (apparently now Renesas) about it? It's more likely that this information is available on the Japanese part of the internet.
crb3 1y ago
Try 1972; taped out in 1971. https://en.wikipedia.org/wiki/555_timer_IC https://en.wikipedia.org/wiki/555_timer_IC