User Guide

4 Conclusion
The budget of 500 k cycles per page is defined by the number of page write and erase operations executed
over the page. Page program operations and ECC are irrelevant regarding the cycling budget of page EEPROM
products. Moreover, this cycling budget is not depending on the temperature and voltage ranges, which makes
page EEPROM very handy.
To guarantee this cycling budget of 500 k cycles, page EEPROM products have follow a robust qualification
process, respecting the JEDEC JESD47 guidelines. Thanks to this qualification method, page EEPROM can
reach a total cumulated cycle of 1 billion.
To optimize the cycling endurance of page EEPROMs, two strategies are available:
1. The pages counting, monitors the write endurance of each page with a dedicated counter byte.
2. The data class budget, distributes the cycling budget of a data over several locations and avoids max
stress on a same area.
The second strategy is recommended when the application budget cycle is known. The first one, more flexible but
less easy-to-use should be used if the application cycling budget is unknown.
The retention capability of page EEPROM demonstrates the high quality of these products. This quality is
possible thanks to a strong qualification process and the ECC (error code correction) which guarantees 100 years
of retention for pages not intensively cycled and 10 years for pages intensively cycled pages.
This application note can help users to calculate their application data retention capability (see
Section 3.4 Application data retention strategy) and ensures the data safety stored in the page EEPROM
products.
AN5866
Conclusion
AN5866 - Rev 1
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