| 摘要 |
A redundant circuit outputting a redundant use signal using a redundant memory cell in place of a defective normal memory cell based on 2n (n is an integer of 2 or more) internal address signals Ai, Aib, Ai+1, Ai+1b for selecting an arbitrary one of a plurality of normal memory cells, and the information from a plurality of program circuits. The program circuits each comprise 2<n-1> redundant address program circuits RAP(i), RAP(i+1), and one redundant use program circuit RP. The redundant circuit comprises redundant address decoding circuits (100, 110) outputting a plurality of redundant address signals Rdi, Rdi+1. A redundant decoding circuit (120) outputs a redundant use signal R_E/D based on the redundant address signals Rdi, Rdi+1 and the information from the redundant use program circuit RP.
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