Because the form, fit and function of the ATECC608B are nearly identical to those of the ATECC608A, the migration is typically a fairly minor task. The minor timing differences between the devices, in general, will not cause an issue and can be easily corrected if they do. The addition of the new RBH package and the enhanced temperature range also increase the market space for the ATECC608B secure element.
The changes implemented in the ATECC608B were primarily done to enhance device security and are largely transparent to the user. For new system designs and a refresh of the existing systems, it is strongly recommended to convert to the ATECC608B as a way to enhance overall system security.