| 摘要 |
PROBLEM TO BE SOLVED: To provide a redundancy circuit which can discriminate whether the information of a defective address is programmed in some specific fuse, and provide a semiconductor device using it. SOLUTION: The redundancy circuit is provided with: redundancy decoders (4, 4C) having a plurality of program circuits (4, 4C-1, 2, 3, 4) and first address setting circuits (4, 4C-0); redundancy decoder selecting circuits (2, 2A, 2B, 2C) having selection circuits (2-1, 2A-1, etc) and second address setting circuits (2-0, 2A-0, etc); and a decoder killer circuit (6). The plurality of program circuits and the plurality of selecting circuits are connected respectively by redundancy discrimination signal lines, respond to an inputted address, and take either state of a selection state and a non-selection state simultaneously and individually. Each of the plurality of program circuits has a plurality of program parts, and the program state of a specific part out of the plurality of program parts is discriminated. COPYRIGHT: (C)2005,JPO&NCIPI
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