FM25640B-GTR

Memory IC Overview

The FM25640B-GTR is a 64-Kbit (8K × 8) serial ferroelectric random access memory (F-RAM) manufactured by Infineon Technologies. It utilizes an advanced ferroelectric process to provide nonvolatile data storage with NoDelay™ writes, eliminating the write delays typical of serial flash and EEPROM. The device features a high-speed Serial Peripheral Interface (SPI) supporting clock frequencies up to 20 MHz in SPI modes 0 and 3. It operates within a supply voltage range of 4.5 V to 5.5 V and is rated for industrial temperatures from –40 °C to +85 °C. Packaged in an 8-pin SOIC, it offers high endurance of 10^14 read/write cycles and long data retention.

Memory IC Feature Summary

• NoDelay™ writes enable immediate data commitment at bus speed without polling or page buffer delays.
• High-endurance ferroelectric architecture supports 10^14 read/write cycles for demanding write-intensive applications.
• Sophisticated multi-tiered write protection scheme includes hardware WP pin control and software block protection.
• Low power consumption with minimal active current draw and ultra-low standby current.

Memory IC Applications

• Data collection systems requiring frequent logging of critical parameters.
• Industrial controls where rapid write speeds prevent data loss during power interruptions.
• Hardware drop-in replacement for serial flash and EEPROM in existing designs.

Memory IC Procurement Notes

Verify that the ordering part number matches the specific package and temperature grade required for your design. Confirm RoHS compliance status if environmental regulations apply to your region. Ensure the supplier provides valid traceability documentation. Check for any recent product change notices regarding assembly sites or material composition updates before finalizing procurement orders.

Memory IC Selection Notes

Select this component when application requirements demand unlimited write endurance and instantaneous write completion times. It is suitable for replacing legacy EEPROMs or serial flash where write latency causes system bottlenecks. Ensure the host microcontroller supports SPI Mode 0 or 3 and can operate within the specified 4.5 V to 5.5 V voltage range. Consider the 8-SOIC package constraints for PCB layout and thermal management.

Memory IC Part Context

The FM25640B belongs to the F-RAM™ series of nonvolatile memories developed originally by Cypress Semiconductor Corporation. Following the acquisition, Infineon Technologies continues to offer this product as part of its portfolio. The device leverages ferroelectric technology to bridge the gap between volatile RAM speed and nonvolatile storage reliability, targeting applications needing high durability and fast access.

Memory IC Replacement Considerations

The datasheet identifies the FM25640B as a direct hardware replacement for serial flash and EEPROM devices with compatible pinouts. Users should verify interface compatibility and voltage levels when migrating from legacy nonvolatile memory technologies to ensure seamless integration without circuit redesign.