Attopsemi’s I-fuse™ One-Time Programmable Non-Volatile memory IP features a very small bit-cell size, high reliability, low program energy requirements, low operating power and a wide operating temperature range to enable Internet-of-Thing (IoT) -, Automotive -, and Communication applications.

Attopsemi, announced that the company’s OTP (One-Time Programmable) memory IP, manufactured on the GlobalFoundries 22FDX® process, has passed qualification for a 3 lots at 150 degrees Celsius High-Temperature Storage (HTS) and 125 degrees Celsius High-Temperature Operating Life (HTOL) for 1,000 hours according to the JEDEC standard. Not only passed all 120Mb in 3 lots the HTS/HTOL qualification, but also the cell currents did not show any variations after the stresses. This is a unique achievement as most other OTP technologies show a severe shift in parameters and so-called tailing bits after HTS and HTOL stresses.

The X/Y plots of the cell current in pre-stress vs post-stress are as follows:

On top of the high reliability advantages, the I-fuse bit-cell can be programmed with very low energy requirements of only 1.0V with 1.0mA of program current. These program voltage and current requirements eliminate the for a charge pump which are usually big compared to the silicon area taken by the memory. Further, the Attopsemi I-fuse OTP size is 1/4 to 1/5 of other OTP technologies. This plus the fact that no charge-pump for programming is needed, makes that an Attopsemi OPT solution occupies a much smaller silicon area than other technologies.

Further, I-fuse™ is proven to work at a wide temperature range (-55oC to +150oC) without the need for any memory redundancy such as ECC or double bit-cells. I-fuse™ also offers high data security and full testability which is unseen in the OTPs industry.

Shine Chung, Chairman of Attopsemi said. “After many years of dedicated work and collaboration with foundries and customers worldwide, our I-fuse™ technology has finally been demonstrated as the OTP of choice. We have proven that I-fuse™ can ensure high reliability with a smaller size, and by using a fraction of program current. With our superior OTP IP, we expect to bring substantial benefits to all semiconductor communities.”