Forum Discussion
Think that is a typo in the subject, should it be EP20K1500EFC33 instead?
That part/series went EOL back in 2016 or so, and the part itself is from the early 2000s.
under Legacy (OBSOLETE) Devices, APEX 20K series.
Unfortunately it appears most of the documentation and tools are from the early 2000s and reference long obsolete versions of
QuartusII in the versions 1.0 - 4.0 range. These are no longer available.
UPDATE
Looks like QuartusII 6.1 supported the APEX20K EP20K1500E device.
Download available here: https://archive.org/details/quartus61win
Not an Intel/Altera site, just an ISO archived on the web. So buyer beware.
Found a datasheet at mouser.com: https://www.mouser.com/datasheet/2/612/apex-1299388.pdf
May be one on the Intel site, but I could not find it.