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collection az, vendor ess, year 1999, type analog, type analog/audio, foundry unknown, tech unknown

ESS ES1989S Allegro motherboard sound controller. Looks like 350 nm 3-metal or so and appears to be the same process as the Silicon Image SII164 although so far it's not known which fab this is.

Package

Die

Size is approximately 5360 x 4040 μm (21.65 mm²)

Overview

Logo/markings. Looks like 3 metal layers since there's 3 via masks.

Random logic