I was just looking for the old National Semiconductor AN-140. This was once found all over the place -- so much so that I had neglected to download and save a copy.
Over time it had moved to the Fairchild site, and although that was subsumed into OnSemi the old links worked.
No Longer... And only one apparently reliable link could be found in google -- and it leads to this fairly useless page.
It took ages to find, but it's here now.
So, if you're looking for an old link of the form https://www.fairchildsemi.com/application-notes/AN/xxxxxxx.pdf you will need to change it to https://www.onsemi.com/pub/Collateral/xxxxxx.pdf.pdf
And yes. That's two ".pdf"s on the end!
Over time it had moved to the Fairchild site, and although that was subsumed into OnSemi the old links worked.
No Longer... And only one apparently reliable link could be found in google -- and it leads to this fairly useless page.
It took ages to find, but it's here now.
So, if you're looking for an old link of the form https://www.fairchildsemi.com/application-notes/AN/xxxxxxx.pdf you will need to change it to https://www.onsemi.com/pub/Collateral/xxxxxx.pdf.pdf
And yes. That's two ".pdf"s on the end!