DSP, Micros & Memory


F-RAM with SPI interface

8 February 2012 DSP, Micros & Memory

Available from Ramtron is a family of 4 Kb to 64 Kb serial non-volatile ferroelectric RAM (F-RAM) products. They feature 1 trillion read/write cycles, low power consumption and NoDelay writes.

The FM25040C, FM25C160C and FM25640C are 4, 16 and 64 Kb memory devices that perform write operations at bus speeds of up to 20 MHz with an industry standard serial peripheral interface (SPI). Data is written to the F-RAM memory array immediately after it is received by the device. Unlike EEPROM and other non-volatile memories that require data polling, F-RAM allows the next bus cycle to commence immediately. These characteristics make the devices well suited for applications that require frequent and rapid writes, such as industrial controls and high-speed data-logging.

The devices operate at 5 V over the complete industrial temperature range of


-40°C to +85°C. In addition, they offer low power consumption with 250 μA active current (typical at 1 MHz clock speed) as well as a sophisticated write protection scheme that prevents inadvertent data writes to the memory. All of the devices are offered in an 8-pin, RoHS-compliant SOIC package.



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