AN317 - Migrating from FM25L04 to FM25L04B

AN317 discusses the key differences that need to be considered when migrating from FM25L04 to FM25L04B. FM25L04 is now obsolete and this application note explains how FM25L04B is a replacement for FM25L04.

Introduction

FM25L04B, a 4-Kbit SPI F-RAM™, is a replacement device for the FM25L04, which is now obsolete. The two devices are identical in terms of pinouts and read / write functionality. In terms of speed, FM25L04 operates up to 14 MHz and FM25L04B operates up to 20 MHz. This application note discusses the key differences between the two devices that need to be considered when migrating from FM25L04 to FM25L04B.