digikey.com try to buy the part and digikey will tell you end of life.
I searched for op-amps and in the filter I have these options. I can only look at Actie parts or only Not For New Designs or only for Obsolete. I think most venders have this filter.
Some manufacturers are willing to tell you what products will be discontinued, and others will even agree to give a notification about that. My solution to that concern has been to create designs that use components from multiple suppliers. Fortunately for me the clients have always been much more concerned about system life than about using the very latest technology.
I have seen on product specification sheets wording to the effect of "Not recommended for new designs", often without additional explanation.
Honest suppliers like Digikey will provide information about future availability, which is very useful as well.
I only got into a jam about an unavailable IC once, when I had just started a job to replace an engineer recently discharged. The part was a cutting-edge instrument amplifier IC, that may have experienced production yield problems, although no explanation was ever provided. So we had a large batch of 500 instrument amp boards with no IC available. And the project delivery date was not flexible.
Fortunately Analog Devices had a module with exactly the same functions and features in their product lineup. Not only did they have them available for immediate delivery, they promised continuing availability for quite a few years, and volunteered that they would provide and EOL notification and several months for final purchases.
Back to post #1: Is the goal to avoid EOL components?? Or to locate some of them to repair a piece of equipment?
OR are you dealing with an organization that has a rule about substitution of equivalent components???? At one time I lost a battle with a service company that clung to that really stupid practice. They kept a production machine off-line for over a month by refusing to accept an alternate better quality, drop in replacement power supply of a better brand and better quality. Just plain STUPID!!!
Many companies have this policy of no substitutions. Period. Not ifs or buts. Going so far as to not allow second sourcing the component from a different manufacturer.
Notwithstanding the fact that massive amounts of legacy components have become and will become obsolete.
In his particular case it was a dual output power supply, about the most common configuration around. And while it is reasonable that a purchasing agent should not make a change, it is a bit different to have the OEM engineer make a substitution.