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F-RAM (Nonvolatile Ferroelectric RAM) | サイプレス セミコンダクタ

F-RAM (Nonvolatile Ferroelectric RAM)

New Update: Learn about the new Excelon™ F-RAM family

Cypress F-RAM (Ferroelectric RAM) combines nonvolatile data storage with the high performance of RAM.


F-RAM provides fast writes at full interface speed. F-RAM does not have any write delays and data is instantly nonvolatile. Traditional nonvolatile memories have delays of 5 or more milliseconds before data becomes nonvolatile. If power is disrupted, pending data is lost unless the system has extra capacitance or batteries to keep the system on until data is stored.

F-RAM offers virtually unlimited endurance of 100 trillion read/write cycles. Traditional nonvolatile memories typically have less than 1 million cycle endurance, forcing system designers to use complex wear-leveling routines and up to 4x more density to prolong the lifetime of these memories.

F-RAM consumes as low as 300 µA active and 6 µA standby current. Because of fast write speeds, F-RAM stays active for short periods of time, yielding very low energy consumption. Traditional nonvolatile memories with write delays must stay active for longer periods of time, resulting in higher energy consumption.

Serial F-RAM offers a pin-to-pin and footprint compatible EEPROM replacement.

Cypress F-RAM Key Features

  • 4 Kb to 4 Mb densities
  • Serial QSPI, DSPI, SPI and I2C interface options
  • Parallel interface options
  • Low power, instant data capture on power loss
  • 100-trillion read/write cycle endurance
  • No batteries required to store data on power loss; RoHS compliant
  • Radiation and magnetic field tolerant
  • Processor Companions with integrated analog and digital functions

F-RAM Technology

Cypress F-RAM is built on Ferroelectric technology. The F-RAM chip contains a thin ferroelectric film of lead zirconate titanate, commonly referred to as PZT. The atoms in the PZT change polarity in an electric field, thereby producing a power efficient binary switch. However, the most important aspect of the PZT is that it is not affected by power disruption, making F-RAM a reliable nonvolatile memory. A common misconception is that ferroelectric crystals are ferromagnetic or have similar magnetic properties. In fact, ferroelectric materials switch in an electric field and are not affected by magnetic fields.


Learn about Infineon Products

Serial and Parallel F-RAM Memories

Cypress’s serial and parallel F-RAM products are the industry’s most energy-efficient and highest-reliability nonvolatile RAM solutions. They are ideal for systems that require the nonvolatile data retention of a ROM and the high speed and high endurance of a RAM. They provide 100 trillion cycle endurance, exceeding the 1 million write cycle limitation of EEPROM and eliminating the need for wear leveling to support a product over its lifespan. Cypress's F-RAM products are ideal for mission-critical applications such as smart meters, automotive electronics, industrial control and automation equipment, multifunction printers and portable medical devices.

F-RAM Features

Attribute Serial F-RAM Features Parallel F-RAM Features
製品セレクタ ガイド
Density 4Kb - 4Mb 64Kb - 4Mb
インターフェース QSPI/QPI
x 8
x 16
Organization 8Kb x 8
32Kb x 8
0.5Kb x 8
2Kb x 8
256Kb x 8
128KB x 8
16Kb x 8
512KB x 8
64Kb x 8
32Kb x 8
128KB x 16
64Kb x 16
256Kb x 16
128KB x 8
1MB x 16
8Kb x 8
Max Frequency Up to 108 MHz (QSPI/QPI)
Up to 108 MHz (DSPI/DPI)
Up to 108 MHz (SPI)
Up to 3.4 MHz (I2C)
Voltage Range 1.71 – 1.89 V
1.8 – 3.6 V
2.0 – 3.6 V
2.7 – 3.65 V
2.7 – 5.5 V
4.5 – 5.5 V
2.0 – 3.6 V
2.7 – 3.6 V
2.7 – 5.5 V
4.5 – 5.5 V
使用温度範囲 -40˚C to +85˚C
-40˚C to +105˚C
-40˚C to +125˚C
-40˚C to +85˚C
パッケージ 8 SOIC
AECQ-100 Grade 1
Grade 3
Grade 1
Grade 3
CY15FRAMKIT-001: Cypress' Serial F-RAM™ Development Kit (Arduino™-Compatible)


Cypress' Serial F-RAM™ Development Kit (Arduino™-Compatible)

CY15FRAMKIT-001 is an easy-to-use and inexpensive F-RAM development kit for Cypress’ high-performance, high-reliability and energy-efficient serial F-RAM devices.

F-RAM Applications

Smart E-Meters
    Automotive Infotainment Systems
      Multi-Function Printers
        Wearable Electronics
          Vehicle Traveling Data Recorders (VTDR)
            Vendor OS ソフトウェア ダウンロード
            サイプレス - AmbiqMicro - SPI FRAM Driver

            サイプレス - Cypress PSoC - Serial FRAM Code Examples

            サイプレス Linux Linux Driver Support for QSPI F-RAM

            サイプレス - NXPLPC18_43_Excelon_QSPI FRAM Driver

            サイプレス - Renesas S7G2 - FRAM QSPI Driver Module

            サイプレス - STM32 - QSPI Excelon F-RAM Driver

            サイプレス - CY15FRAMKIT-001 Serial F-RAM™ Development Kit Example Project (SPI/I2C)

            サイプレス - CY15FRAMKIT-002 F-RAM Development Kit Example Project (SPI/QSPI)

            サイプレス Linux F-RAM Support under Linux – KBA223028