Patent ID: 8217709
Filing Date: 2012-07-10
Classification: G11C,H01L

Abstract:
1. A semiconductor device, comprising: a signal output unit including m pieces of (where m is an integer and m≧2) of fuses provided on a semiconductor substrate and an output terminal that outputs a binary signal depending on a disconnection status of said m pieces of fuses; and a decision unit deciding whether n or more pieces (where m≧n≧2) of fuses are disconnected out of said m pieces of fuses, and outputting a result of the decision, wherein said output terminal always outputs a potential signal of a first magnitude when at least one of said m pieces of fuses is disconnected, and always outputs a potential signal of a second magnitude when none of said m pieces of fuses is disconnected, and wherein said decision unit always outputs said potential signal of said first magnitude when n or more pieces of fuses are disconnected, and always outputs said potential signal of said second magnitude when less than two pieces of fuses are disconnected, and wherein said m pieces of fuses are connected to said decision unit without by way of said output terminal, and said m pieces of fuses are connected to said output terminal without by way of said decision unit.