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AN316 - Migrating from FM25640 to FM25640B | Cypress Semiconductor

AN316 - Migrating from FM25640 to FM25640B

Last Updated: 
Aug 26, 2015
Version: 
*B

AN316 discusses the key differences that need to be considered when migrating from FM25640 to FM25640B.FM25640 is now obsolete and this application note explains how FM25640B is a replacement for FM25640.

Introduction

FM25640B, a 64-Kbit SPI F-RAM™, is a replacement device for FM25640, which is now obsolete. The two devices are identical in terms of pinouts and read/write functionality. In terms of speed, the FM25640 operates up to 5 MHz while the FM25640B operates up to 20 MHz. This application note discusses the key differences between the two devices that need to be considered when migrating from FM25640 to FM25640B.