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Ultra-low-power FRAM targets industrial automation apps

Posted: 29 Dec 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Fujitsu Semiconductor America? industrial automation? FRAM? binary counter?

Fujitsu Semiconductor America (FSA) has uncloaked what it describes as an ultra-low-power FRAM device with an integrated binary counter function. The MB85RDP16LX features multiple optimisations that promise to cut energy consumption to less than 10 per cent of what is required by standard FRAM solutions. According to the company, the device is aimed at industrial automation applications involving energy harvesting for rotary encoders, motor control and sensors.

The MB85RDP16LX promises to provide significant energy savings by integrating the counter function into the FRAM device. This contrasts with conventional system environments using standard memory, which require the MCU to read data from the memory device before performing computation and writing new data back to the memory to complete the counting operation. In contrast, the MB85RDP16LX replaces these separate read/write operations with a single command from the MCU and uses only the binary counter, resulting in energy savings of up to 94 per cent, noted Fujitsu.

The power-up time of the MB85RDP16LX has been optimized to 5us, which is 38 times faster than standard FRAM devices. This enables extremely fast device wake-up while consuming as little energy as possible.


MB85RDP16LX can be connected via single- and dual-SPI interfaces. A dual SPI interface offers customers the option of halving the clock frequency, achieving further power saving gains without impacting performance. Customers also have the option to configure with either a 43bit or a 46bit binary counter.

To satisfy the broad temperature ranges required by the industrial automation market, the MB85RDP16LX has been specified for an operating temperature range of -40°C to 105°C without compromising its 10-year data retention time.

MB85RDP16LX comes in an SON-8 package with physical dimensions of 2 x 3mm, which permits the design of miniature devices. Compared with typical SOP-8 packages, more than 80 per cent of the memory's PCB space can be saved.

Also available through Fujitsu is a 16Kb FRAM without the binary counter for general data storage. MB85RS16N devices are available in SOP and SON packages with operating temperature up to 95°C.

The MB85RDP16LX has entered mass production and samples are available.

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