发明授权
- 专利标题: Semiconductor memory device and system with redundant element
- 专利标题(中): 具有冗余元件的半导体存储器件和系统
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申请号: US12683029申请日: 2010-01-06
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公开(公告)号: US07933159B2公开(公告)日: 2011-04-26
- 发明人: Hiroyuki Kobayashi , Daisuke Kitayama
- 申请人: Hiroyuki Kobayashi , Daisuke Kitayama
- 申请人地址: JP Yokohama
- 专利权人: Fujitsu Semiconductor Limited
- 当前专利权人: Fujitsu Semiconductor Limited
- 当前专利权人地址: JP Yokohama
- 代理机构: Arent Fox LLP
- 主分类号: G11C29/00
- IPC分类号: G11C29/00
摘要:
A semiconductor memory device includes a memory cell array, a redundant element, an address specifying circuit configured to select one of a plurality of addresses as a redundancy address in response to a switchover signal, a decoder circuit configured to select the redundant element in response to an externally applied address that matches the redundancy address selected by the address specifying circuit, and a test mode setting circuit configured to change the switchover signal in response to an externally applied input, thereby to cause the redundancy address assigned to the redundant element to be switched between different ones of the plurality of addresses.
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