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Design of eFuse OTP Memory with Wide Operating Voltage Range for PMICs

PMIC용 넓은 동작전압 영역을 갖는 eFuse OTP 설계

  • Jeong, Woo-Young (Department of Electronic Engineering, Changwon National University) ;
  • Hao, Wen-Chao (Department of Electronic Engineering, Changwon National University) ;
  • Ha, Pan-Bong (Department of Electronic Engineering, Changwon National University) ;
  • Kim, Young-Hee (Department of Electronic Engineering, Changwon National University)
  • Received : 2013.11.25
  • Accepted : 2013.12.31
  • Published : 2014.01.31

Abstract

In this paper, reliability is secured by sensing a post-program resistance of several tens of kilo ohms and restricting a read current flowing over an unblown eFuse within $100{\mu}A$ since RWL driver and BL pull-up load circuits using a regulated voltage of V2V ($=2V{\pm}10%$) are proposed to have a wide operating voltage range for eFuse OTP memory. Also, when a comparison of a cell array of 1 row ${\times}$ 32 columns with that of 4 rows ${\times}$ 8 columns is done, the layout size of 4 rows ${\times}$ 8 columns is smaller with $187.065{\mu}m{\times}94.525{\mu}m$ ($=0.01768mm^2$) than that of 1 row ${\times}$ 32 columns with $735.96{\mu}m{\times}61.605{\mu}m$ ($=0.04534mm^2$).

본 논문에서는 eFuse OTP 메모리가 넓은 동작전압 영역을 갖도록 하기 위해서 V2V($=2V{\pm}10%$)의 regulation된 전압을 이용한 RWL 구동회로와 BL 풀-업 부하회로를 제안하므로 수 십 $k{\Omega}$의 post-program 저항을 센싱하면서 OTP 셀의 blowing되지 않은 eFuse를 통해 흐르는 읽기 전류를 $100{\mu}A$ 이내로 억제하여 신뢰성을 확보하였다. 그리고 OTP 셀 어레이 사이즈를 1행 ${\times}$ 32열과 4행 ${\times}$ 8열의 경우에 대해 OTP IP 크기를 비교한 결과 32비트 eFuse OTP의 레이아웃 면적은 각각 $735.96{\mu}m{\times}61.605{\mu}m$ ($=0.04534mm^2$), $187.065{\mu}m{\times}94.525{\mu}m$ ($=0.01768mm^2$)로 4행 ${\times}$ 8열의 32비트 eFuse OTP 사이즈가 1행 ${\times}$ 32열의 32비트 eFuse OTP 사이즈보다 더 작은 것을 확인하였다.

Keywords

References

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  1. Line Scan Sensor용 저면적 eFuse OTP 설계 vol.18, pp.8, 2014, https://doi.org/10.6109/jkiice.2014.18.8.1914
  2. Power IC용 저면적 Differential Paired eFuse OTP 메모리 설계 vol.8, pp.2, 2014, https://doi.org/10.17661/jkiiect.2015.8.2.107
  3. PMIC용 저면적 Dual Port eFuse OTP 메모리 IP 설계 vol.8, pp.4, 2014, https://doi.org/10.17661/jkiiect.2015.8.4.310