Developed a 4M-bit FeRAM with a maximum memory capacity operating at 125℃.

■Non-volatile memory for automotive and industrial machinery that guarantees reliability in high-temperature environments
The “MB85RS4MTY” is a non-volatile memory with a doubled memory capacity of 4M bits and operates with an SPI interface at a wide power supply voltage range of 1.8V to 3.6V. Even in high-temperature environments of 125°C, the operating current is kept to a maximum of 4mA (at 50MHz operation), and the power-down current is a maximum of 30µA, contributing to low power consumption in environmentally conscious systems.
■Main specifications
- Product name: MB85RS4MTY
- Capacity (memory configuration): 4M bits (512K x 8 bits)
- Interface: SPI (Serial Peripheral Interface)
- Operating frequency: 50MHz (maximum)
- Operating power supply voltage: 1.8V to 3.6V
- Operating temperature range: -40°C to +125°C
- Write/read guarantee cycles: 10 trillion cycles
- Package: 8-pin DFN, 8-pin SOP


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Fujitsu Semiconductor Memory Solutions has developed the 4M-bit FeRAM "MB85RS4MTY," which has the maximum memory capacity as a FeRAM product guaranteed to operate at 125℃, and has started providing evaluation samples. This product is a non-volatile memory that guarantees low operating current and 10 trillion data write cycles even in high-temperature environments of 125℃. It is optimal for automotive applications, such as advanced driver-assistance systems (ADAS), and for industrial robots.
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