At last it looks like we will soon be able to take advantage of memory chips using ReRAM technology. Fujitsu Semiconductor has announced production of a 4 Mb ReRAM chip. Developed together with Panasonic Semiconductor Solutions the MB85AS4MT is the first mass-produced example using this technology and currently has the highest memory density of any ReRAM chip.

The MB85AS4MT has an SPI interface and operates with a supply voltage in the range from 1.65 to 3.6 V. One of the stand-out features of this technology is its low operating current of just 0.2 mA at a maximum read speed of 5 MHz, making it ideal for use in mobile battery powered applications like wearables or health appliances such as digital hearing aids.

In comparison with other non-volatile technologies such as EEPROM and flash memory, ReRAM uses less power and has improved data retention with a higher rewrite cycle spec. The chip is packaged in an 8-pin SOP outline (5.3 mm) making it pin compatible with other memories such as EEPROMs.

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