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RF-HDT-DVBB: Data retention time

FRANK1
Expert 7855 points
Part Number: RF-HDT-DVBB

Hi sir,

my customer have a system in the field using RFID tags RF-HDT-DVBB-N2.

The datasheet says they have data retention of >10 years.

The current devices have been in the field operating reliably for almost 10 years now.

Our first purchase of these were in 2010
Our client now wants to continue using the product for another 10 years and we are currently undergoing a feasibility of another 10 years of service.
Will the RFID tags that have been in the field for almost 10 years retain their data for at least another 10 years?
Is there a risk they will lose their information after 20 years of use?
If there is a risk of the tags losing their data, would it just be a case of re-programming the tag or should they be replaced?

Thanks

  • 0
    TI__Guru*** 129660 points

    Hello m123456,

    I will ask our product manager if he can provide further comments, I am not sure how much we have spec'd beyond 10 years. It may be a situation of we think it would be fine but we cannot guarantee it. He is located in Freising, so please anticipate early next week for feedback here.

    Here is datasheet of the device that is at the core of the tag: https://www.ti.com/lit/ds/scbu046/scbu046.pdf

    The spec is for 10 years minimum at 55C. This is EEPROM memory by the way.

    What is the typical temperature of operation by the way? That can impact the longevity as well. EEPROM is known to have much worse data retention at higher temperatures.

    I am not very familiar with how data retention vs re-programming works so don't 100% quote me on this, but from my understanding once data retention is lost then re-programming will not help because the data retention is based on the physical quality of the EEPROM structure to retain current and that degrades over time (and is why temperature places such a big role).

  • 0 in reply to Ralph Jacobi
    TI__Expert 7855 points

    Hi Ralph,

    Thank you for the quick response.

    The devices are used throughout New Zealand and the average temperature there is quite low, estimated under 24C.

    The devices are attached to pipes that are outdoors (covered in a rubber mould) so they would warm up in the sun.

    The tags are used as part of a safety system that relies on the data read to be correct.

    If there is any uncertainty of the longevity of the EEPROM after this time we may be best recommended to replace the units in the field.
    Is there any official TI document that would state the performance would degrade after 10 years?

    This is to notify the customer of the potential risks of not updating the RFID tags in service as part of the planned upgrade to the system.

    Thank u.

    Regards,

  • 0 in reply to FRANK1
    TI__Guru*** 129660 points

    Hello,

    For documentation regarding this, please email me directly.

    The uncertainty regarding the longevity isn't so much from what we anticipate from a device perspective but rather the customer use case. The operating temperature over the 10 year period influences this heavily. If the sun is warming the pipes and raising the temperature into much higher ranges, then that would negative impact the life of the tag. The customer would need to understand their worst case operating scenarios to be able to best gauge this issue.

    Regarding re-programming, that can have a positive impact, but the UID sector cannot be re-programmed and if they rely on that, re-programming would not necessarily help.