joeo10, 
The #Zilog #Z80 product line, specifically the #Z84C00 is being End of Life (EOL) after 48 years of production. You can still order chips until June 14th. https://www.mouser.com/PCN/Littelfuse_PCN_Z84C00.pdf
It's been a great nearly 50 year ride for the series as it was famously used as the main processor for the Pac-Man arcade among others.
