Quad SPI FRAM device features 4Mb capacity

By using 4 bi-directional I/O pins, the Quad SPI FRAM device can reach a data transfer rate of 54Mb per second at an operating frequency of 108MHz. In this respect, MB85RQ4ML is over four times as fast as our existing parallel 4Mb FRAM device and even outperforms the 45ns parallel SRAM.

MB85RQ4ML is offered in a SOP-16 package. In comparison to our parallel devices of the same density, which are housed in TSOP-44 or TSOP-48 packages, MB85RQ4ML achieves a package size reduction of at least 50% as well as a pin count reduction of 60%. The low pin count of MB85RQ4ML contributes significantly to a simplified circuit routing on the PCB. As a result, the PCB space needed can be reduced to a large extent.

Besides its high speed, MB85RQ4ML offers the usual FRAM characteristics as well, like non-volatility and high endurance of 10 trillion read/write cycles. Since power is not required to retain the data written in the memory, MB85RQ4ML can be a perfect candidate to replace battery backed-up SRAMs. While the conventional memory architecture of embedded systems consists of a RAM and a non-volatile memory, MB85RQ4ML can, in many applications, replace both kinds of memory technologies and offer a unified memory technology in one chip. In this way, customers can realise a more simplified and stable system architecture. “With this ultra high speed Quad SPI product, we have reached another milestone in enhancing our FRAM technology,” commented Uwe Püsche, Senior Director Sales, Marketing, QA and Technical Support, FEEU.

MB85RQ4ML operates at a voltage range of 1.7 – 1.95V. Apart from Quad SPI, single SPI interface is supported as well. Among Fujitsu’s serial FRAM portfolio, this 4Mb device represents the highest density on offer.