- Gamma radiations are used to sterilise medical equipment
- The DS28E83 and DS28E84 provides symmetric-key SHA-256 and public-key ECC secure authentication
- This secured authentication device not only supports memory needs but also provides a single communication channel between the devices
The use of disposable tools, sensors, or accessories in the medical field has drastically reduced the amount of healthcare-associated infections. Yet, the risk of re-usage of disposable devices prevails in society. This article introduces a method to attach non-volatile memory with medical devices. This can decrease the flow of infectious diseases among patients.
Embedding non-volatile memory devices with medical devices has always been a challenge to the design engineers. This is due to the use of gamma radiations in medical industries.
The role of gamma radiation in medical devices
Gamma radiations are used to sterilise medical equipment and works as a disinfectant to the equipment. Also, gamma radiations are directly incompatible with semiconductor devices. This includes erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory.
This incompatibility is due to the fact that exposure to gamma’s high-ionizing radiation corrupts the logic bit values within these memories. As a result, relevant data programmed before gamma sterilization can’t be retained. Thus, the designers have been forced to choose between the added functionality provided by embedded memory and the preferred sterilization method for their products.
Memory storage cell technology
Maxim’s Integrated has recently introduced DS2 series memory devices. These devices use memory-storage-cell technology. This technology yields to the development of IC’s which are highly resistive towards gamma radiation.
According to the company, the DS28E83 and DS28E84 provide symmetric-key SHA-256 and public-key ECC secure authentication. This protects the patient against the risks associated with non-qualified counterfeit devices, incidental overuse or reuse of devices.
Uses 1-wire bus for communication interface
The device communicates over a single-contact 1-wire bus at standard speed or overdrive speed. This 1-wire interface minimizes the interconnect between a sensor and the instrument. It operates between the host and peripheral over a single pin interface. This, as a result, reduces interconnect complexity and reduces overall cost.
Each device runs a unique 64-bit serial number. This number is factory-programmed into the chip. These devices combine the flexibility of the memory device with higher radiation resistance.
This secured authentication device not only supports memory needs but also provides a single communication channel between the devices. Medical consumables can directly benefit from the addition of non-volatile (NV) memory for embedding manufacturing characteristics and operating parameters.
By incorporating robust protection into a design, technology investments can be successfully defended and brands can be safeguarded. As a result, it helps in ensuring the trust of patients and healthcare professionals.