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FM31256-GTR

256Kbit F-RAM, I2C, 1MHz, SOIC-8

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Manufacturer Part：

FM31256-GTR

Package：

SOIC-8 (4.9x3.9mm)

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Description

Product Overview

The FM31256-GTR from Infineon (Cypress) is a 256Kbit F-RAM (Ferroelectric RAM) with I2C interface, 1MHz speed, and 10^14 read/write endurance in SOIC-8 for non-volatile data storage.

Key Specifications

Package SOIC-8 (4.9×3.9mm)

Features

  • See datasheet for complete specifications
  • Industry-standard package

Applications

  • Industrial control
  • Consumer electronics
  • Communication equipment
  • Power management

The FM31256-GTR from Infineon (Cypress) is a 256Kbit F-RAM (Ferroelectric RAM) with I2C interface, 1MHz speed, and 10^14 read/write endurance in SOIC-8 for non-volatile data storage.

The FM31256-GTR is a 256Kbit (32KB) F-RAM (Ferroelectric RAM) from Infineon (formerly Ramtron) with integrated RTC and system supervisor in SOIC-8. The F-RAM stores data using ferroelectric polarization: a PZT (lead zirconate titanate) film holds each bit as the orientation of electric dipoles. Read/write operations complete in 70ns (vs. 5ms for EEPROM page writes), and the device supports 10^14 read/write cycles (vs. 10^5-10^6 for EEPROM) with 151-year data retention. The integrated RTC tracks time with 300nA battery-backup current. The system supervisor provides: a power-fail reset output (RST goes low when VDD drops below 2.63V), a programmable low-line comparator (CAL/PFO) for early warning of power failure, and a watchdog timer. The dual I2C interface allows the F-RAM and RTC to have separate I2C addresses, enabling independent access. The F-RAM is ideal for storing frequently updated data like meter readings, counters, and configuration parameters that would wear out EEPROM.

Pin Name Type Function
1 C2 Input I2C serial clock (secondary address)
2 D2 I/O I2C serial data (secondary address)
3 A0 Input Address select 0
4 A1 Input Address select 1
5 VSS Power Ground
6 CAL/PFO Output Calendar alarm / Power-fail output
7 RST Output Reset output (active low, push-pull)
8 VDD Power Supply (2.7-3.6V)
  • Industrial control
  • Consumer electronics
  • Communication equipment
  • Power management
    • Manufacturer Part Number Package Notes
    Infineon FM31256-G SOIC-8 Same device, tube package
    Infineon FM3164-GTR SOIC-8 64Kbit F-RAM version
    Ramtron FM24C256B-GTR SOIC-8 256Kbit F-RAM only (no RTC)
    STMicroelectronics M95256-WMN6P SOIC-8 256Kbit EEPROM (no F-RAM speed)
    NXP PCF85263ATL-1,118 TSSOP-8 RTC with 256B SRAM, low power
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