The Ramtron FM25L256-S is a 256-kilobit Serial Ferroelectric Random Access Memory (F-RAM) device utilizing advanced ferroelectric process technology. This F-RAM is a non-volatile memory that reads and writes like a RAM, offering the benefits of both RAM and ROM. It retains data reliably for years while eliminating the complexities, overhead, and system-level reliability problems caused by EEPROM and other non-volatile memories.

Applications

• Data logging in industrial environments
• Smart card memory
• Medical monitoring devices
• Automotive black boxes
• Gaming equipment
• Printers
• Networking equipment

Features

• 256-kilobit nonvolatile memory: Organized as 32,768 x 8 bits.
• High endurance: 10<sup>14 read/write cycles.
• Fast access: 104 MHz Serial Peripheral Interface (SPI).
• Low power consumption: 200 μA active current, 6 μA standby current.
• Low voltage operation: 2.7V - 3.6V
• Operating temperature range: -40°C to +85°C
• Data retention: 10 years
• Small package: SOIC package for easy integration.

Benefits

• Superior data reliability: Provides robust data retention even in harsh conditions.
• Fast write speeds: Allows real-time data logging without the write delays associated with EEPROM.
• Low power operation: Ideal for battery-powered applications.
• Simplified system design: SPI interface enables easy integration with microcontrollers.
• Long-term data retention: Ensures data integrity over an extended period.
• High endurance: Minimizes the need for frequent replacement, saving costs.

Additional Details

The FM25L256-S is designed to minimize system power requirements. The SPI interface operates at up to 40 MHz, which allows for rapid data transfer. It supports SPI modes 0 and 3. Because F-RAM is inherently radiation hardened, this device is highly resistant to data corruption caused by ionizing radiation. The device utilizes an industry-standard serial interface for direct connectivity with a microcontroller. It is available in an 8-pin SOIC package. The part is RoHS compliant, reflecting environmental consciousness.