AN320 discusses the key differences that need to be considered when migrating from FM25256B to FM25W256. FM25256B is now obsolete and this application note explains how FM25W256 is a replacement for FM25256B.
Introduction
FM25W256, a 256-Kbit SPI F-RAM™, is a replacement device for FM25256B, which is now obsolete. The two devices are identical in terms of pinout, package composition and dimensions, read/write functionality, Write Protect operation, and address pin functionality. This application note discusses the key differences between the two devices that need to be considered when migrating from FM25256B to FM25W256.
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AN320 - Migrating from FM25256B to FM25W256
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