Patent ID: 7015795
Filing Date: 2006-03-21
Classification: G06F,G11C,H01L

Abstract:
1. A self-identifying integrated circuit for performing a predetermined electrical function in an external electric circuit via a plurality of electrodes electrically coupled thereto, the self-identifying integrated circuit further providing a unique identification code to the external electric circuit, the predetermined electrical function being exclusive of providing the unique identification code to the external electric circuit, the self-identifying integrated circuit comprising: identification storage means for immutably storing the unique identification code; a primary function circuit for performing the predetermined electrical function in the external electric circuit, said primary function circuit being fabricated on a circuit die electrically coupled to the plurality of electrodes; an output port including at least one electrode, said output port electrically coupled to said identification storage means for conveying the unique identification code to the external circuit; and encasement means for permanently enclosing said primary function circuit and said identification storage means therein, the plurality of electrodes coupled to said primary function circuit, said at least one electrode of said output port extending through said encasement means, wherein said encasement means includes a package substrate and an encapsulant, wherein said identification storage means is disposed on said package substrate, and wherein said identification storage means includes a voltage tap network, the unique identification code being stored as a set of discrete voltage levels in said voltage tap network.