28nm 0.3V 1W2R Sub-Threshold FIFO Memory for Multi-Sensor IoT Applications

Huan Jan Tseng, Po Tsang Huang, Shang Lin Wu, Sheng Chi Lung, Wei Chang Wang, Wei Hwang, Ching Te Chuang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


For energy-constrained multi-sensing IoT devices, ultra-low-power queueing is one of the critical event-driven design challenges to capture low-speed sensing data with various sampling frequencies. In this paper, 0.3V 1W2R sub-threshold FIFO memory is proposed for ultra-low-voltage operations using Schmitt-Trigger (ST) 12.5T SRAM bit-cell, ripple bitline structure and cross-point data-aware write wordline scheme. The ST 12.5T memory bit-cell not only increases hold static noise margin (HSNM) but also eliminates write half-select disturbance for robust sub-threshold operation. Secondly, an adaptive timing tracing circuitry and negative bit-line circuits are employed in the design for PVT variation-tolerant read operation and write ability enhancement. Thirdly, the proposed ripple bitline structure divides the bitline into several segments for ultra-low-voltage operations. Thus, the access time can be reduced apparently. Finally, a 4kb sub-threshold FIFO memory with the proposed multi-port ST 12.5T bit-cells is implemented by UMC 28nm HKMG technology. The proposed FIFO memory can execute one write and two read operations simultaneously for multi-sensor IoT applications. The average power and maximum write frequency are 4.01 μ W and 780kHz at 0.3V, respectively.

Original languageEnglish
Title of host publicationProceedings - 32nd IEEE International System on Chip Conference, SOCC 2019
EditorsDanella Zhao, Arindam Basu, Magdy Bayoumi, Gwee Bah Hwee, Ge Tong, Ramalingam Sridhar
PublisherIEEE Computer Society
Number of pages6
ISBN (Electronic)9781728134826
StatePublished - Sep 2019
Event32nd IEEE International System on Chip Conference, SOCC 2019 - Singapore, Singapore
Duration: 3 Sep 20196 Sep 2019

Publication series

NameInternational System on Chip Conference
ISSN (Print)2164-1676
ISSN (Electronic)2164-1706


Conference32nd IEEE International System on Chip Conference, SOCC 2019


  • FIFO memory
  • multi-port SRAM
  • Schmitt Trigger
  • sub-threshold SRAM

Fingerprint Dive into the research topics of '28nm 0.3V 1W2R Sub-Threshold FIFO Memory for Multi-Sensor IoT Applications'. Together they form a unique fingerprint.

Cite this