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Using Peudo-Static RAMs in place of LP SRAMS

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cadrjr

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I'm updating a design which uses LP SRAMs from Cypress/Renesas. These parts are expensive and probably won't be manufactured for much longer.
https://www.digikey.com/product-detail/en/CY62187EV30LL-55BAXI/CY62187EV30LL-55BAXI-ND/2188332

They are great in that they can be battery backed very easily.


I now want to replace these if possible with Pseudo Static RAMS. (CellularRAM) (A fraction of the cost.)
e.g. https://www.digikey.com/product-detail/en/MT45W8MW16BGX-701 IT TR/557-1444-2-ND/2056252

Has anyone done this in a battery backed situation ?
Did you backup Vcore and Vio or just Vcore ?
Was it reliable ?

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