Cypress 256Kbit FRAM candidate is FM25V02A-G.
However, Cypress FM25V02A-G and MR25H256CDF have different package sizes, and Cypress's FRAM package is smaller.
･Cypress FM25V02A-G : 8-pin DFN, 4.0mm × 4.5mm × 0.8mm.
･Everspin MR25H256CDF : 8-DFN Small Flag Package, 5.10mm x 6.10mm x 0.9mm.
Please confim the datasheet, and if Cypress FRAM meets your requirements, please evaluate Cypress FRAM.
Thanks and regards,