FRAM is an advantage of combining both ROM and RAM memory. Good at high speed writing, long endurance and low power consumption. Fujitsu Semiconductor offers FRAM products with serial (I2C and SPI) and parallel peripherals. What are the characteristics of each product of different interfaces ?
Serial interface
Serial interface memory products range from 16Kbit to 4Mbit SPI interface products and 4Kbit to 1Mbit I2C interface products. In addition to the main 3.3V work products, the power supply voltage is expanding 1.8V work products. In addition to SOPs that are compatible with EEPROM and serial flash memory, the package also offers ultra-small package products such as SON (Small Outline Non-leaded Package) and WL-CSP (Wafer Level Chip Size Package) for wearable devices.
The advantages of serial interface memory over other non-volatile memories are fast writes, high read and write endurance, and low power consumption.
*1: When the operating temperature is lower than +85 °C, the data retention time can be extended. Please refer to the data sheet for details.
*1: When the operating temperature is lower than +85 °C, the data retention time can be extended. Please refer to the data sheet for details.
*2 : Meets SPI and Quad SPI interfaces
*3 : Maximum 40MHz operation is possible in the high-speed read mode.
*4 : There is a binary counter function
*5 : Maximum 7.5MHz operation is possible in dual SPI mode.
Parallel interface memory
The parallel interface memory is 256Kbit to 4Mbit in TSOP or SOP package. The power supply voltage is 3.3V during operation, but the MB85R4M2T can work in a wide range from 1.8V to 3.6V. The package is a TSOP or SOP that is compatible with SRAM.
In SRAM and applications that use data retention batteries, parallel interface memory is used as a solution to further reduce power consumption or reduce battery.
*1: When the operating temperature is lower than +55°C or +85°C, the data retention time can be extended. For details, please refer to the data sheet.
In the future, Fujitsu will also use technology to improve some technical specifications, such as operating voltage and access speed, and provide a variety of products. Fujitsu Semiconductor is able to offer a wide range of individual FRAM products using Fujitsu's proprietary technology not available from other companies.
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