Test and Testability Techniques for Open Defects in RAM Address Decoders

  • Authors:
  • Manoj Sachdev

  • Affiliations:
  • WAY 4.1/ Philips Research Laboratories, Prof. Holst laan 4/ 5656 AA Eindhoven/ The Netherlands

  • Venue:
  • EDTC '96 Proceedings of the 1996 European conference on Design and Test
  • Year:
  • 1996

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Abstract

It is a prevalent assumption that all RAM address decoder defects can be modelled as RAM array faults influencing one or more RAM cells. Therefore, can be implicitly detected by testing the RAM matrix with the march tests. Recently, we came across some failures in embedded SRAMs which were not detected by the march tests. The carried out analysis demonstrated the presence of open defects in address decoders that can not be modelled as the conventional coupling faults, therefore, are not detected by the march tests. In this article, we present the test and testability strategies for such hard to detect open defects.