FRAM with 256 K (32 K × 8) Bit SPI interface. SOP 8pin package.

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The Fujitsu MB85RS256 is an FRAM (Ferroelectric Random Access Memory) chip in a configuration of 32,768 words x 8 bits, using the ferroelectric process and silicon gate CMOS process technologies for forming the nonvolatile memory cells. The MB85R256H is able to retain data without using a back-up battery, as is needed for SRAM. The memory cells used in the MB85R256H can be used for 1010 read/write operations, which is a significant improvement over the number of read and write operations supported by Flash memory and E2PROM. The MB85R256H uses a pseudo - SRAM interface compatible with conventional asynchronous SRAM.


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Bit configuration : 32,768 words 8 bits
Operating power supply voltage : 3.0 V to 3.6 V
Operating frequency : 15 MHz (Max)
Serial Peripheral Interface : SPI (Serial Peripheral Interface)
Correspondent to SPI mode 0 (0, 0) and mode 3 (1, 1)
Operating temperature range : −20 C to +85 C
Data retention : 10 years (+55 C)
High endurance : 10 Billion Read/writes
Package : 8-pin plastic SOP (FPT-8P-M02)

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