Redundancy test method for a semiconductor memory
AssigneeTexas Instruments Incorporated
InventorsBrian L. Brown, David R. Brown
Life of this patent
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AssigneeTexas Instruments Incorporated
InventorsBrian L. Brown, David R. Brown
Estimating the term…
A semiconductor memory (300) device having a redundancy test scheme is disclosed. A memory cell array (310) includes a normal section (312) and a redundant section (314, 316, and 318) of memory cells. In a normal mode of operation, the redundant section is selected if an applied address (ADD) corresponds to a defective bit in the normal section. In a redundant test mode of operation, the redundant section is selected based on a redundant test address (DFTRA, DFTCA). If the redundant test address is in the normal select logic level, a normal decode section (306 and 324) is selected. The redundant test address and a redundant test activation signal are applied to a redundant decoder (500). If the redundant test address is in a redundant select logic level and the redundant test activation signal is active, the redundant decoder is selectable based on the applied address value.
A semiconductor memory device, comprising:
A semiconductor memory device, comprising:
Dependencies are inferred from the claim text.