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Critical charge characterization in 6-T SRAMs during read mode

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4 Author(s)
Bota, S. ; Grup de Sistemes Electron., Balearic Islands Univ., Palma de Mallorca, Spain ; Torrens, G. ; Alorda, B. ; Segura, J.

In this work we analyze the effects of radiation-induced transient pulses on 6T SRAM cells operating in read mode. The critical charge of a memory cell during read mode is lower than in hold mode. For 1 to 0 upsets, this reduction reaches a factor x 1.5 for events produced by alpha particles; this factor is even higher for longer induced current pulses. The impact of events propagated through the bit-lines is also analyzed. Results show that it is possible the occurrence of an upset in the sense amplifier producing a wrong output in the readout process without changing the memory cell stored value.

Published in:

On-Line Testing Symposium, 2009. IOLTS 2009. 15th IEEE International

Date of Conference:

24-26 June 2009