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Product Variant Information section
Product Specification Section
Pricing Section

Stock: 1,000

On Order:Order inventroy details 1,120
Factory Stock:Factory Stock: 0
Factory Lead Time: N/A
Minimum Order: 1
Multiple Of: 1
Quantity Web Price
1+ $16.15


Attributes Table
FRAM Type Non Volatile
Memory Density 256kb
Interface Type 2-Wire
Supply Voltage-Nom 2.7V to 3.6V
Temperature Range -40°C to +85°C
Features and Applications

The FM31L278-G is a 256 kb memory density, 2-wire interface integrated processor companion with memory, available in surface mount SOIC-14 package.


  • High Integration Device Replaces Multiple Parts:
    • Serial Nonvolatile Memory
    • Real-time Clock (RTC)
    • Low Voltage Reset
    • Watchdog Timer
  • Ferroelectric Nonvolatile RAM:
    • 64Kb, and 256Kb versions
    • Virtually Unlimited Read/Write Endurance
    • 38 year Data Retention (+75°C)
    • NoDelay™ Writes
  • Real-time Clock/Calendar:
    • Backup Current at 2V, 1.15 μA (max.) at +25C
    • Seconds through Centuries in BCD format
    • Tracks Leap Years through 2099
    • Uses Standard 32.768 kHz Crystal (12.5pF)
  • Processor Companion:
    • Active-low Reset Output for VDD and Watchdog
    • Programmable VDD Reset Trip Point
    • Manual Reset Filtered and Debounced
    • Programmable Watchdog Timer
  • Fast Two-wire Serial Interface:
    • Up to 1 MHz Maximum Bus Frequency
    • Supports Legacy Timing for 100 kHz & 400 kHz
    • Device Select Pins for up to 4 Memory Devices
  • Easy to Use Configurations:
    • Operates from 2.7 to 3.6V
    • 14-pin “Green”/RoHS SOIC package (-G)
    • Low Operating Current