Segmented Match-Line and Charge-Sharing Based Low-Cost TCAM
- Authors
- Minseob Shim; Junwon Jeong; Junyoung Song; Yongtae Kim; Woong Choi
- Issue Date
- Dec-2022
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Keywords
- CAM; Couplings; Delays; Discharges (electric); Logic gates; low-power; segmented ML; Sensors; Switches; TCAM; Topology
- Citation
- IEEE Transactions on Circuits and Systems II: Express Briefs, v.69, no.12, pp 5104 - 5108
- Pages
- 5
- Journal Title
- IEEE Transactions on Circuits and Systems II: Express Briefs
- Volume
- 69
- Number
- 12
- Start Page
- 5104
- End Page
- 5108
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152272
- DOI
- 10.1109/TCSII.2022.3202605
- ISSN
- 1549-7747
1558-3791
- Abstract
- This paper presents a segmented match-line (ML) and charge-sharing based search scheme for low-cost ternary contents addressable memory (TCAM). In the proposed TCAM, a first-round search operation is performed on half cells located in even columns. During the first-round search, most of the mismatch cases are filtered out while remaining few mismatched cases that is misrecognized as the matched case. To complete the search operation in a low-power manner, a charge-sharing between the segmented MLs is used for the second-round search operation. The proposed 16KB 16T-NOR TCAM macro has been implemented using a 28nm CMOS technology. Numerical results show that the proposed TCAM improves sensing delay up to 5.6x faster and saves search energy-delay-product by 83% compared to the conventional approaches. IEEE
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