A 25-year-old relay switching circuit (6 inputs driving 6 relays) includes a HEF4023BP: triple, 3-input AND gates. Now kaput, it needs to be replaced.
This IC has not been available for some time. I can find no supplies (other than eBay which for obvious reasons I'd like to avoid).
What CMOS family can provide this modest performance? The circuit is neither fast (switching relays a few times a minute) nor quick (fast relay activation is not a requirement).
I don't know what makes HEF CMOS unique, so I don't know for what feature the designers chose this CMOS family. (Trying to educate myself, Google wouldn't return any useable search results for the HEF family.)
Replacement suggestions welcome. And a clue to what HEF is all about.
Thanks.