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FUJITSU SEMICONDUCTOR
DATA SHEET
DS501-00009-0v01-E
Memory FRAM
64 K (8 K × 8) Bit SPI
MB85RS64A
■ DESCRIPTION
MB85RS64A is a FRAM (Ferroelectric Random Access Memory) chip in a configuration of 8,192 words × 8
bits, using the ferroelectric process and silicon gate CMOS process technologies for forming the nonvolatile
memory cells.
MB85RS64A adopts the Serial Peripheral Interface (SPI).
The MB85RS64A is able to retain data without using a back-up battery, as is needed for SRAM.
The memory cells used in the MB85RS64A can be used for 10 10 read/write operations, which is a significant
improvement over the number of read and write operations supported by Flash memory and E 2 PROM.
MB85RS64A does not take long time to write data unlike Flash memories nor E 2 PROM, and MB85RS64A
takes no wait time.
■ FEATURES
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Bit configuration
Operating power supply voltage
Operating frequency
Serial Peripheral Interface
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8,192 words × 8 bits
3.0 V to 3.6 V
20 MHz (Max)
SPI (Serial Peripheral Interface)
Correspondent to SPI mode 0 (0, 0) and mode 3 (1, 1)
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Operating temperature range
Data retention
High endurance
Package
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? 40 ° C to + 85 ° C
10 years ( + 55 ° C)
10 Billion Read/writes
8-pin plastic SOP (FPT-8P-M02)
Copyright?2011 FUJITSU SEMICONDUCTOR LIMITED All rights reserved
2011.6
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