Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2009-10-22

2011-10-25

Phung, Anh (Department: 2824)

Static information storage and retrieval

Read/write circuit

Testing

C365S203000

Reexamination Certificate

active

08045409

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.

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patent: 6501692 (2002-12-01), Melanson et al.
patent: 2010/0054062 (2010-03-01), Kobatake
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patent: 2002-313083 (2002-10-01), None

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