A 80C51 derivative.
Many thanks to debauer for providing the samples!
(Logo) SAB 80C517A-N18 TAIWAN LA (C) INTEL'80 9630
(C) 1980 INTEL
M0614-A000-12 (C) 1994 SIEMENS
Mirrored:
M614A12-10-12-C5P-V1.2
Die size approx. 6.4×5.7mm
Top metal imaged under Nikon PlanApo 20x/0.75