Year of Invention for CMOS 555 Timer IC and Key Differences from Bipolar 555

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#1 21680569 27 Aug 2018 01:48

Thomas Scarborough Thomas Scarborough

Anonymous

Post #1
21680569 27 Aug 2018 01:48

Friends, here is some information I just cannot find. I'm intending to slip it into an article. When was the CMOS 555 timer IC first invented? Thanks in anticipation!

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#2 21680570 27 Aug 2018 02:09

Jacob Beningo Jacob Beningo

Anonymous

Post #2
21680570 27 Aug 2018 02:09

Sounds like 1971 it was invented and then commercialized in 1972.
Reference: https://www.eetimes.com/document.asp?doc_id=1262353
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#3 21680571 27 Aug 2018 04:38

David Ashton David Ashton

Anonymous

Post #3
21680571 27 Aug 2018 04:38

This information (and more) is in the Wikipedia article on the 555 which is the first article that comes up if you search for "555 Timer" on Google. Did you not find that?
#4 21680572 06 Feb 2019 18:46

PeterTraneus Anderson PeterTraneus Anderson

Anonymous

Post #4
21680572 06 Feb 2019 18:46

The original Signetics bipolar (not CMOS) 555 is in the 1972 Signetics databook.
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