Package
Top:
Actel A1020B PL84C 9552
Sticker:
E2072-88802
9638 REV
hp
Bottom:
PHILLIPINES 5364790 E0
Die
Manufacturer/Copyright:
Actel (c) 1993 (M)
Texas Instruments logo also present:
Ti
http://klabs.org/richcontent/fpga_content/actel_radiation_summary_for_sirt.htm