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Datakey Electronics Releases New
GammaSafe Portable Memory Line
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Wednesday, October 20, 2010:
The new GammaSafe memory token from Datakey Electronics is a non-volatile, reprogrammable, portable memory device that survives gamma sterilization with no loss of data.
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The GammaSafe data-carrier/receptacle system allows medical device manufacturers to easily add anti-counterfeit and limit-use capabilities to disposable attachments that are sterilized using gamma radiation.
The SGT4Kb GammaSafe memory token contains four kilobits of non-volatile, re-writable memory. The memory is accessed using an SPI bus and is functionally similar to an SPI EEPROM. But unlike actual EEPROM devices, which experience data loss and even device failure when exposed to significant doses of gamma radiation, GammaSafe memory tokens have been proven to withstand up to 45kGy (4.5Mrad) of gamma radiation with no data loss.
Shown above are both sides of the GammaSafe memory token. Opposite the contacts is an optional sterilization indicator, which changes colors when exposed to gamma radiation.
Medical device manufacturers who produce single-use or limited-use disposable attachments (e.g. catheters, filters, tubing, medical lasers, etc.) that plug in to a base controller can now add a non-volatile memory device to the attachment, even if their attachments contain no active electronics. Adding a GammaSafe memory token to an attachment enables several applications. For example, the GammaSafe memory token can store an encrypted product authentication code to protect against counterfeit disposables. The re-writable memory can also be used to limit the usage of the attachment, ensuring that it is not used more than the prescribed number of times. The disposable's model number and associated parameters, along with calibration information can be written to the GammaSafe token during production; then, in the field, this data can be automatically transferred to the base controller unit, eliminating the chance for human error from incorrect data entry.
The GammaSafe memory token is shown above with two mating receptacle options—the GR4410 panel mount (left) and the GR4220 PCB-mount (right).
Click on photo for larger image.
"Our rugged SlimLine™ memory tokens have been used with disposable medical devices for more than 15 years," stated Paul Plitzuweit, business development engineer for the GammaSafe product line. "Our traditional SlimLine tokens survive both EtO and autoclave sterilization methods. Now, with the addition of the GammaSafe line, we have a portable memory solution for OEMs of medical disposables no matter which sterilization method they use--EtO, autoclave or gamma."
In addition to the memory token, the GammaSafe product line includes a line of mating receptacles. The GammaSafe receptacles are based on Datakey Electronics' proven SlimLine receptacle design and are available in through-hole (GR4220PCB), surface-mount (GR4220SMT), and panel mount (GR4310 and GR4410) models. The panel-mount receptacles are available in splash-proof (IP65-rated), immersion (IP67-rated), and EMI-reduction versions--supporting a variety of medical device applications, especially those with wash-down requirements. GammaSafe receptacles accept both GammaSafe and SlimLine memory tokens--GammaSafe memory tokens for use with disposable attachments, and larger-capacity SlimLine memory tokens for applications like firmware updates or for downloading logged data.
Unlike RFID solutions that require OEMs to integrate complicated RF transceiver circuitry and an antenna into their embedded designs, integrating the GammaSafe memory system only requires the addition of a simple receptacle. No complex circuitry is needed--the contacts of the GammaSafe receptacle simply connect directly to the microcontroller's SPI port. When the GammaSafe memory token is inserted into the receptacle, the microcontroller can read and write to it just as if it was an SPI EEPROM IC soldered to the board. Further, because the GammaSafe system is contact-based, as opposed to wireless, there is no ambiguity as to which memory device is being read--a frequent concern with RFID and other wireless systems.
The GammaSafe memory tokens above are shown with optional tethers and sterilization indicators. Gamma sterilization turns the indicator from yellow to red.
The GammaSafe memory token is offered with an optional integrated tether. The optional tether consists of a 5-inch (12.7 cm) cable-tie that has been "pre-looped" and integrated into the head of the memory token. This allows OEMs an easy way to attach the GammaSafe token to their disposable devices.
The GammaSafe memory token also features an optional sterilization indicator, which is housed within a recessed window on the front side of the token. Before sterilization, the indicator is yellow/orange in color. After gamma sterilization (10kGy dosage or greater), the indicator changes to a vivid red color. This optional feature enables medical personnel to confirm at-a-glance that the sealed medical device they are about to open has indeed undergone gamma sterilization.
OEMs who would like pricing, availability, samples or more information on the GammaSafe memory token and receptacles are encouraged to contact the Datakey Electronics factory at info@datakey.com or 1-800-328-8828 (+1-952-746-4066).
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