Integrated Circuit DIP 40-pin PHE-21-1184-507 Antistat Case AS IS

Condition: Component is in a pink case labeled Antistat. Case has code PHE-21-1184-507. Part itself has 20 pins on each side. Part is labeled with a logo (MOS?); beneath that is C010750; third line has code 4581. Item was not taken out of the antistat package but unsure whether previous owner had. Untested--Selling As Is. Comes as shown.