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Maxim unveils gamma-radiation-resistant, nonvolatile memory

29 May 2015

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Maxim Integrated Products Inc. has released the DS28E80 gamma-radiation-resistant, nonvolatile (NV) 1-Wire memory that the company said makes it easy to calibrate a consumable medical sensor and to monitor or control unsanitary reuse of medical disposables.

Gamma radiation sterilisation is typically used on single-use disposable medical sensors and consumables because the method is predictable, reliable, faster to process and usable across a wide array of product materials and packaging types. But, gamma radiation is incompatible with traditional floating-gate memory technologies used in semiconductors because gamma's high-ionising radiation erases the memory. The DS28E80 NV memory, however, is resistant to gamma radiation up to 75kGy (kilo gray). With flexible programming options, it allows OEMs to factory calibrate their sensors, tools and accessories to their host medical instrument in the field. It can be used to monitor or even prevent unsanitary reuse of a disposable medical sensor and consumables. It operates over the company's trusted 1-Wire interface, so consumable manufacturers can replace multiple cumbersome cables with a single contact.

DS28E80 block diagram

According to the company, the novel device allows OEMs to automatically detect and calibrate sensors and accessories to ensure quality. It also guards against incorrect attachment and warns or prevents unsanitary reuse of consumables. In addition, the embedded 1-Wire protocol provides unalterable 64bit factory-assigned serial ID that allows for tracking and can prevent usage of unauthorised consumables. Likewise, it deliver permanent write protection by providing flexible per-block options for use memory.

The DS28E80 is specified over the -40°C to 85°C temperature range. A DS28E80EVKIT evaluation (EV) kit is also available. Pricing is available upon request.

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