Hi, TI's engineer,These parts arrived with visual defects:
1) There is a fuzzy marking on the front side of the chips, when viewed through a microscope, you can see a defect, like a burnt top layer.
2) There is an engraving of five characters on the reverse side. The font height varies on different instances of the chips.
In some places, the symbols are visible through a magnifying glass with a small magnification, and in others they are difficult to distinguish even under a microscope.
3) Visual defects at the corners. It looks like the chips of the outer case, under which the "inside" of the chips is visible
Please comment on each of the three points above.
Thank you in advance!
