Patent ID: 6518593
Filing Date: 2003-02-11
Classification: H01L

Abstract:
An integrated circuit comprising:a functional circuit that achieves an actual operation function of the integrated circuit; a redundant circuit for replacing a defective circuit within the functional circuit; a test circuit that carries out a test for detecting a defective circuit; at least one input buffer circuit, each input buffer circuit having two output terminals, that receives a signal from outside the input buffer circuit, and outputs a signal from said two output terminals; and at least one output buffer circuit, each output buffer circuit having two input terminals, that selectively receives a signal from any one of said two input terminals and outputs a signal outside the output buffer circuit, wherein said functional circuit is provided between one of said two output terminals of said input buffer circuit and one input terminal of said two input terminals of said output buffer circuit, and said test circuit is provided between the other output terminal of said two output terminals of said input buffer circuit and the other input terminal of said two input terminals of said output buffer circuit.