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FM25640 데이터시트(PDF) 1 Page - Ramtron International Corporation |
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FM25640 데이터시트(HTML) 1 Page - Ramtron International Corporation |
1 / 14 page This product conforms to specifications per the terms of the Ramtron Ramtron International Corporation standard warranty. Production processing does not necessarily in- 1850 Ramtron Drive, Colorado Springs, CO 80921 clude testing of all parameters. (800) 545-FRAM, (719) 481-7000, Fax (719) 481-7058 www.ramtron.com Rev. 2.1 Aug. 2003 1 of 14 FM25640 64Kb FRAM Serial Memory Features 64K bit Ferroelectric Nonvolatile RAM • Organized as 8,192 x 8 bits • High Endurance 1 Trillion (10 12) Read/Writes • 10 Year Data Retention • NoDelay™ Writes • Advanced high-reliability ferroelectric process Very Fast Serial Peripheral Interface - SPI • Up to 5 MHz maximum bus frequency • Direct hardware replacement for EEPROM • SPI Mode 0 & 3 (CPOL, CPHA=0,0 & 1,1) Sophisticated Write Protection Scheme • Hardware Protection • Software Protection Low Power Consumption • 10 µA Standby Current Industry Standard Configuration • Industrial Temperature -40 ° C to +85° C • 8-pin SOIC Description The FM25640 is a 64-kilobit nonvolatile memory employing an advanced ferroelectric process. A ferroelectric random access memory or FRAM is nonvolatile but operates in other respects as a RAM. It provides reliable data retention for 10 years while eliminating the complexities, overhead, and system level reliability problems caused by EEPROM and other nonvolatile memories. Unlike serial EEPROMs, the FM25640 performs write operations at bus speed. No write delays are incurred. Data is written to the memory array mere hundreds of nanoseconds after it has been successfully transferred to the device. The next bus cycle may commence immediately. In addition, the product offers substantial write endurance compared with other nonvolatile memories. The FM25640 is capable of supporting up to 10 12-read/write cycles -- far more than most systems will require from a serial memory. These capabilities make the FM25640 ideal for nonvolatile memory applications requiring frequent or rapid writes. Examples range from data collection, where the number of write cycles may be critical, to demanding industrial controls where the long write time of EEPROM can cause data loss. The FM25640 provides substantial benefits to users of serial EEPROM, in a hardware drop-in replacement. The FM25640 uses the high-speed SPI bus, which enhances the high-speed write capability of FRAM technology. The specifications are guaranteed over an industrial temperature range of -40°C to +85°C. Pin Configuration Pin Names Function /CS Chip Select /HOLD Hold /WP Write Protect SCK Serial Clock SI Serial Data Input SO Serial Data Output VDD 5V VSS Ground Ordering Information FM25640-S 8-pin SOIC CS SO WP VSS VDD HOLD SCK SI 1 2 3 4 8 7 6 5 |
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