TY - GEN
T1 - Impacts of NBTI and PBTI effects on ternary CAM
AU - Lee, Yen Han
AU - Lin, Ing-Chao
AU - Wang, Sheng Wei
PY - 2013/7/5
Y1 - 2013/7/5
N2 - Ternary content addressable memory (TCAM), which can store 0, 1 and X in its cells, is widely used to store routing tables in network routers. Meanwhile, NBTI (Negative Bias Temperature Instability) and PBTI (Positive Biased Temperature Instability), which increase Vth and degrade transistor switching speed, have become major reliability challenges. In this paper, we propose a novel TCAM architecture to reduce BTI degradation using a bit-flipping technique. This novel TCAM architecture ensures the correctness of read, write and search operations. We also analyze the signal probabilities of TCAM cells, and demonstrate that the bit-flipping technique can balance signal probabilities. By using the bit-flipping technique, 76.40% of the data cells under investigation were found to have signal probabilities close to 50%, which is 62.80% higher than the original architecture. In addition, 92.60% of the mask cells had signal probabilities close to 50%, which is 91.20% higher than the original architecture. When considering the overhead of the bit-flipping technique, the best flipping frequency is once a day.
AB - Ternary content addressable memory (TCAM), which can store 0, 1 and X in its cells, is widely used to store routing tables in network routers. Meanwhile, NBTI (Negative Bias Temperature Instability) and PBTI (Positive Biased Temperature Instability), which increase Vth and degrade transistor switching speed, have become major reliability challenges. In this paper, we propose a novel TCAM architecture to reduce BTI degradation using a bit-flipping technique. This novel TCAM architecture ensures the correctness of read, write and search operations. We also analyze the signal probabilities of TCAM cells, and demonstrate that the bit-flipping technique can balance signal probabilities. By using the bit-flipping technique, 76.40% of the data cells under investigation were found to have signal probabilities close to 50%, which is 62.80% higher than the original architecture. In addition, 92.60% of the mask cells had signal probabilities close to 50%, which is 91.20% higher than the original architecture. When considering the overhead of the bit-flipping technique, the best flipping frequency is once a day.
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U2 - 10.1109/ISQED.2013.6523588
DO - 10.1109/ISQED.2013.6523588
M3 - Conference contribution
AN - SCOPUS:84879560896
SN - 9781467349536
T3 - Proceedings - International Symposium on Quality Electronic Design, ISQED
SP - 38
EP - 45
BT - Proceedings of the 14th International Symposium on Quality Electronic Design, ISQED 2013
T2 - 14th International Symposium on Quality Electronic Design, ISQED 2013
Y2 - 4 March 2013 through 6 March 2013
ER -