A 8051 derivative.
Die size: 5.38×7.58mm approx.
Bonding pad opening: 126 um, square.
Metal pitch: 6.74 um.
Poly pitch: 4.9 um.
Poly width: 2.15 um.
VALVO
V83C851V0
(M)(C) INTEL 1980 (M)(C) PHILIPS 1988
VB HGA CG JK AM JM AK KA ERM JD
Top metal imaged under a Nikon Plan Apo 20x/0.75