FM25V20A 2-Mbit (256 K 8) Serial (SPI) F-RAM FM25V20A, 2-Mbit (256 K X 8) Serial (SPI) F-RAM Features Functional Overview 2-Mbit ferroelectric random access memory (F-RAM) logically The FM25V20A is a 2-Mbit nonvolatile memory employing an organized as 256 K 8 advanced ferroelectric process. A ferroelectric random access 14 memory or F-RAM is nonvolatile and performs reads and writes High-endurance 100 trillion (10 ) read/writes similar to a RAM. It provides reliable data retention for 151 years 151-year data retention (see the Data Retention and Endur- while eliminating the complexities, overhead, and system-level ance table) reliability problems caused by serial flash, EEPROM, and other NoDelay writes nonvolatile memories. Advanced high-reliability ferroelectric process Unlike serial flash and EEPROM, the FM25V20A performs write Very fast SPI operations at bus speed. No write delays are incurred. Data is Up to 40-MHz frequency written to the memory array immediately after each byte is Direct hardware replacement for serial flash and EEPROM successfully transferred to the device. The next bus cycle can Supports SPI mode 0 (0, 0) and mode 3 (1, 1) commence without the need for data polling. In addition, the product offers substantial write endurance compared with other Sophisticated write protection scheme nonvolatile memories. The FM25V20A is capable of supporting Hardware protection using the Write Protect (WP) pin 14 10 read/write cycles, or 100 million times more write cycles Software protection using Write Disable instruction than EEPROM. Software block protection for 1/4, 1/2, or entire array These capabilities make the FM25V20A ideal for nonvolatile Device ID memory applications, requiring frequent or rapid writes. Manufacturer ID and Product ID Examples range from data collection, where the number of write cycles may be critical, to demanding industrial controls where the Low power consumption long write time of serial flash or EEPROM can cause data loss. 800 A active current at 1 MHz The FM25V20A provides substantial benefits to users of serial 100 A (typ) standby current EEPROM or flash as a hardware drop-in replacement. The 3 A sleep mode current FM25V20A uses the high-speed SPI bus, which enhances the Low-voltage operation: V = 2.0 V to 3.6 V high-speed write capability of F-RAM technology. The device DD incorporates a read-only Device ID that allows the host to Industrial temperature: 40 C to +85 C determine the manufacturer, product density, and product revision. The device specifications are guaranteed over an Packages industrial temperature range of 40 C to +85 C. 8-pin small outline integrated circuit (SOIC) package For a complete list of related documentation, click here. 8-pin dual flat no leads (DFN) package Restriction of hazardous substances (RoHS) compliant Logic Block Diagram WP Instruction Decoder CS Clock Generator Control Logic SCK Write Protect 256 K x 8 FRAM Array Instruction Register 18 8 Address Register Counter SI SO Data I/O Register 3 Nonvolatile Status Register Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600 Document Number: 001-90261 Rev. *I Revised August 28, 2019FM25V20A Contents Pin Definitions ..................................................................3 Operating Range ............................................................. 12 Overview ............................................................................4 DC Electrical Characteristics ........................................ 12 Memory Architecture ...................................................4 Data Retention and Endurance ..................................... 13 Serial Peripheral Interface SPI Bus ..........................4 Capacitance .................................................................... 13 SPI Overview ...............................................................4 Thermal Resistance ........................................................ 13 SPI Modes ...................................................................5 AC Test Conditions ........................................................ 13 Power Up to First Access ............................................5 AC Switching Characteristics ....................................... 14 Command Structure ....................................................6 Power Cycle Timing ....................................................... 15 WREN - Set Write Enable Latch .................................6 Ordering Information ...................................................... 16 WRDI - Reset Write Enable Latch ...............................6 Ordering Code Definitions ......................................... 16 Status Register and Write Protection .............................7 Package Diagrams .......................................................... 17 RDSR - Read Status Register .....................................7 Acronyms ........................................................................ 19 WRSR - Write Status Register ....................................8 Document Conventions ................................................. 19 Memory Operation ............................................................9 Units of Measure ....................................................... 19 Write Operation ...........................................................9 Document History Page ................................................. 20 Read Operation ...........................................................9 Sales, Solutions, and Legal Information ...................... 21 Fast Read Operation ...................................................9 Worldwide Sales and Design Support ....................... 21 Sleep Mode ...............................................................10 Products .................................................................... 21 Device ID ...................................................................10 PSoC Solutions ...................................................... 21 Endurance .................................................................11 Cypress Developer Community ................................. 21 Maximum Ratings ...........................................................12 Technical Support ..................................................... 21 Document Number: 001-90261 Rev. *I Page 2 of 21