DS28E07 and DS2431 are mostly software and hardware compatible, except the following:
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1-Wire pullup voltage of the DS28E07 is 3V~5.25V. For DS2431, it's 2.8V~5.25V.
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The maximum programming current and programming time of the DS28E07 is 1.2mA and 12ms, respectively, while the DS2431 is 0.8mA and 10ms respectively.
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The minimum Write/Erase Cycles of the DS28E07 is 1000 cycles at 85C, but for the DS2431, it is 200k cycles at 25C and 50k cycles at 85C.
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The minimum data rention of DS28E07 is 10 years while the DS2431 is 40 years.