Anchor with the letters āCā and āWā inscribed in Top Right corner of the die.
Copyright:
(M) 1991
ST
11-92 8-91
FB
A/A
SGS-THOMSON
MICRO-
ELECTRONICS
Left:
HCMOS4T
Top Left:
ISB24118X1 WL000 ST
Top metal @ mit20x (shot 2)
shot 1 was low quality of the same die. Removed since obsolete