SgtWookie ... you are absolutely right -- I should have tested them before posting. I need better quality control
I had a model of an IR2112 in one of my working directories and I had saved these links in a text file some time ago. Apparently, the links are now stale. I will now do 50 pushups as my punishment!
It seems to be a hazard nowadays - many of the electronics manufacturers have re-vamped their websites, and I'm getting lots of "404 - page not found" errors if I follow links from other websites; it's probably because they want people to come to their home page and perform searches from there. That way they can show more products to the prospective customer.