Update:

> The PPC-based SoCs remain at Macom, apparently: [...]

They have since found their new home on the Macom website:

https://www.macom.com/products/networking/processors/embedded-processors
http://web.archive.org/web/20210118064512/https://www.macom.com/files/live/sites/ma/files/contributed/support/Connectivity%20and%20Embedded%20EOL%20products3.pdf


Edit:
01/2019 notice on discontinuation of PPC405EX(r), PPC460EX(r) and PPC460GT
Edit2: replaced dead links by working ones

[ Edited by Andreas_Wolf 15.05.2024 - 17:43 ]