Invention Grant
- Patent Title: Semiconductor memory device and system with redundant element
- Patent Title (中): 具有冗余元件的半导体存储器件和系统
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Application No.: US12683029Application Date: 2010-01-06
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Publication No.: US07933159B2Publication Date: 2011-04-26
- Inventor: Hiroyuki Kobayashi , Daisuke Kitayama
- Applicant: Hiroyuki Kobayashi , Daisuke Kitayama
- Applicant Address: JP Yokohama
- Assignee: Fujitsu Semiconductor Limited
- Current Assignee: Fujitsu Semiconductor Limited
- Current Assignee Address: JP Yokohama
- Agency: Arent Fox LLP
- Main IPC: G11C29/00
- IPC: G11C29/00

Abstract:
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.
Public/Granted literature
- US20100110809A1 SEMICONDUCTOR MEMORY DEVICE AND SYSTEM WITH REDUNDANT ELEMENT Public/Granted day:2010-05-06
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