AN314 - Migrating from FM25040A to FM25040B

AN314 discusses the key differences that need to be considered when migrating from FM25040A to FM25040B. FM25040A is now obsolete and this application note explains how FM25040B is a replacement for FM25040A.

Introduction

FM25040B, a 4-Kbit SPI F-RAM™, is a replacement device for FM25040A, which is now obsolete. The two devices are identical in terms of pinouts and read/write functionality. This application note discusses the key differences between the two devices that need to be considered when migrating from FM25040A to FM25040B.