Allegro V155B

Another quick die photo from a chip taken off the Nortel Handset from 1993.  It’s an Allegro V155B  (Possibly QMV155B as it was likely made for Nortel and given a QMV designation).

The package has markings on the top and underside which is very unusualAllegro V155B Package

I could not find a datasheet and have no idea what the part does.

Die size is 1.65 mm x 1.65 mm (12.7 mm2) and it is fabricated on a single metal Bipolar processAllegro V155B

This entry was posted in Die Photo and tagged . Bookmark the permalink.