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FM28V020: 256-Kbit (32 K × 8) F-RAM Memory | Cypress Semiconductor

FM28V020: 256-Kbit (32 K × 8) F-RAM Memory

Last Updated: 
Oct 07, 2015


  • 256-Kbit ferroelectric random access memory (F-RAM) logically organized as 32 K × 8
    • High-endurance 100 trillion (1014) read/writes
    • 151-year data retention (see the Data Retention and Endurance table)
    • NoDelay™ writes
    • Page mode operation
    • Advanced high-reliability ferroelectric process
  • SRAM compatible
    • Industry-standard 32 K × 8 SRAM pinout
    • 70-ns access time, 140-ns cycle time
  • Superior to battery-backed SRAM modules
    • No battery concerns
    • Monolithic reliability
    • True surface mount solution, no rework steps
    • Superior for moisture, shock, and vibration
    • Resistant to negative voltage undershoots
  • Low power consumption
    • Active current 5 mA (typ)
    • Standby current 90 μA (typ)
  • Low-voltage operation: VDD = 2.0 V to 3.6 V
  • Industrial temperature: –40 °C to +85 °C
  • Packages:
    • 28-pin small outline integrated circuit (SOIC) package
    • 28-pin thin small outline package (TSOP) Type I
    • 32-pin thin small outline package (TSOP) Type I
  • Restriction of hazardous substances (RoHS) compliant

Functional Overview

The FM28V020 is a 32 K × 8 nonvolatile memory that reads and writes similar to a standard SRAM. A ferroelectric random access memory or F-RAM is nonvolatile, which means that data is retained after power is removed. It provides data retention for over 151 years while eliminating the reliability concerns, functional disadvantages, and system design complexities of battery-backed SRAM (BBSRAM). Fast write timing and high write endurance make the F-RAM superior to other types of memory.

The FM28V020 operation is similar to that of other RAM devices and therefore, it can be used as a drop-in replacement for a standard SRAM in a system. Read and write cycles may be triggered by CE or simply by changing the address. The F-RAM memory is nonvolatile due to its unique ferroelectric memory process. These features make the FM28V020 ideal for nonvolatile memory applications requiring frequent or rapid writes.

The device is available in a 28-pin SOIC, 28-pin TSOP I and 32-pin TSOP I surface mount packages. Device specifications are guaranteed over the industrial temperature range –40 °C to +85 °C.