I've been using it in a few projects at work as a replacement for flash backed serial RAM. It drops right in, as it is pin and function compatible with other small SPI and I2C nvram and eeprom chips, and isn't really much more expensive in small capacities.

What is the latency like vs DRAM?

I really like their FRAM products too. Ultra low power, high data endurance. They have this NFC FRAM MCU product that can be powered by the reader itself.

I want someone to incorporate these into their hardware wallet products. Would also be very cool for high endurance data storage. I understand we are talking about kilobytes of storage but still they have very small packaging anyway, just use them (the SPI bus FRAM products) by the dozens.

FRAM seems great and I wonder why it's not used more. TI has some MSP430 processors that include it, but when they went to the MSP432 (ARM architecture), they said something about a process incompatibility. Some ARM or Risc-V processors with FRAM would be great.

Any idea what the process issue is? Would you say FRAM is on the decline? Super low powered CMOS ram used to also be a thing, but I haven't seen that in a while either.

Added: article mentions flash memory is $15/gbit. I guess that is NOR flash? NAND is way way cheaper, more like $15/terabit.

Another question: is it reasonable to say that FRAM automatically implements secure erasure? Like if you overwrite a cell, can you be sure that the old contents are gone? With flash, you have to worry about stuff like sector remapping other the covers.

Here's a 4 mbit Adafruit FRAM breakout, out of stock but smaller sizes are available: https://www.adafruit.com/product/4719

TI MSP430FR5969 development board: https://www.ti.com/tool/MSP-EXP430FR5969 That is a fancy MSP430 processor with 64KB of FRAM and 2KB of regular ram. The board is $16. The regular ram is I think a little bit faster than the FRAM and good for "infinite" write cycles instead of mere trillions, so I guess you need both. They have a few more of these boards including one with 128KB of FRAM if I remember right.

minor correction: the central atoms in pzt are not zircon but zirconium. zircon is zirconium silicate, the form in which zirconium is almost always found in nature. there is no silicate in pzt

also, the atom that can substitute for zirconium in that central position is not lead but titanium. you do explain this in the following sentence, but first you say 'causes the lead or [zirconium] atom to physically move', which is wrong

Bubble memory next please! It was the next big thing for storage for a brief period in the late 1980s.

I've always wondered if the ROMs on my VAXstation 4000/90a are ferroelectric. The DEC manuals refer to it as flash ROM, but I've also heard / read it referred to as FRAM, although I couldn't say I remember where or when.

But 512KB of FRAM at $3 per megabit would make that pricier than the machine! So I wonder what it has in it instead.

Interesting! Thanks :)

Are the parts pin-compatible with parallel sram? I've always thought it would be nice to replace the battery-backed SRAM in old video game cartridges with MRAM or FeRAM

I have one! Any idea if the PZT cubes are added using the typical photoresist masking/etching or are they placed on die using some other process?

Any thoughts on how it compares to Intel Optane NVM? Also is there any particular material you envision as a potential successor for it?

I remember there being some document in which TI describes how this is done atomically at a physical level so there is no way that you can end up losing power and having the read-triggered write fail to complete.