The FM25L04 is a 4-kilobit nonvolatile memoryemploying an advanced ferroelectric process. Aferroelectric random access memory or FRAM isnonvolatile and performs reads and writes like aRAM. It provides reliable data retention for 45 yearswhile eliminating the complexities, overhead, andsystem level reliability problems caused byEEPROM and other nonvolatile memories.Unlike serial EEPROMs, the FM25L04 performswrite operations at bus speed. No write delays areincurred. Data is written to the memory arrayimmediately after each byte has been transferred tothe device. The next bus cycle may commencewithout the need for data polling. In addition, theproduct offers virtually unlimited write endurance.Also, FRAM exhibits much lower powerconsumption than EEPROM.These capabilities make the FM25L04 ideal fornonvolatile memory applications requiring frequentor rapid writes or low power operation. Examplesrange from data collection, where the number ofwrite cycles may be critical, to demanding industrialcontrols where the long write time of EEPROM cancause data loss.The FM25L04 provides substantial benefits to usersof serial EEPROM as a hardware drop-inreplacement. The FM25L04 uses the high-speed SPIbus, which enhances the high-speed write capabilityof FRAM technology. Device specifications areguaranteed over an industrial temperature range of-40°C to +85°C.
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