Cheap SPI MRAM - any experience with PM004MNIATR?

[blinken]

I'm looking for options for cheap (<$4), SPI-addressable, 1-4Mbit of fast memory for a new project and I came across these SOP-8 MRAM modules from Shanghai Siproin Microelectronics:

• 4Mbit PM004MNIATR, qty 10 USD1.9123 https://www.lcsc.com/product-detail/Random-Access-Memory-RAM_Shanghai-Siproin-Microelectronics-PM004MNIATR_C5444277.html
• 2Mbit PM002MNIATR, qty 10 USD1.6604 https://www.lcsc.com/product-detail/Random-Access-Memory-RAM_Shanghai-Siproin-Microelectronics-PM004MNIATR_C5444277.html

Does anyone have any experience with these parts? The cheapest option @ digikey.com for a 2Mbit SPI MRAM module is USD $6.67 (qty 1000), so this would be a substantial improvement.

[Benta]

Why does it have to be MRAM?
F-RAM or nvSRAM are much more common.
https://www.infineon.com/cms/en/product/

[MT]

50Mhz max is not fast, even SPI Psuevdo RAM(old school DRAM) does at least 133Mhz

[blinken]

Why does it have to be MRAM?
F-RAM or nvSRAM are much more common.

Thanks for the suggestion! I'd totally take FRAM (or any other fast-write technology), but the cheapest Infineon part I can find is FM25V20A-PG, USD4.60 @ digikey.

50Mhz max is not fast, even SPI Psuevdo RAM(old school DRAM) does at least 133Mhz

I mostly just need fast writes to an SPI or I2C memory block to buffer some collected data for processing - 50MHz is plenty fast. Something like the Microchip 23LCV1024-I/ST actually looks pretty good though.