Invention Grant
- Patent Title: Semiconductor memory device
- Patent Title (中): 半导体存储器件
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Application No.: US12603879Application Date: 2009-10-22
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Publication No.: US08045409B2Publication Date: 2011-10-25
- Inventor: Takuya Hirota , Takao Yanagida
- Applicant: Takuya Hirota , Takao Yanagida
- Applicant Address: JP Kanagawa
- Assignee: Renesas Electronics Corporation
- Current Assignee: Renesas Electronics Corporation
- Current Assignee Address: JP Kanagawa
- Agency: Sughrue Mion, PLLC
- Priority: JP2008-275424 20081027
- Main IPC: G11C7/00
- IPC: G11C7/00

Abstract:
A semiconductor memory device includes a plurality of memory cells that are arranged at intersections of a word line with bit line pairs, a precharge circuit that is arranged for each of the bit line pairs and is configured to precharge each of the bit line pairs, and a Y-switch circuit that is arranged for each of the bit line pairs and is configured to select each of the bit line pairs. The semiconductor memory device further includes a mode switching unit that switches the normal mode and the test mode in accordance with a mode selection signal that is externally supplied, a plurality of individual control units that control operation of each of the precharge circuits in accordance with operation of each of the Y-switch circuits in the normal mode, and a block control unit that collectively turns off all of the precharge circuits in the test mode.
Public/Granted literature
- US20100103756A1 SEMICONDUCTOR MEMORY DEVICE Public/Granted day:2010-04-29
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