The FM25V02-DGTR is a 256Kbit (32K x 8) non-volatile FRAM from Infineon's F-RAM series, using ferroelectric technology that combines the fast write speed of SRAM with the data retention of EEPROM. The SPI interface runs at 40 MHz, so a full 32K-byte page can be written in under 1 ms — orders of magnitude faster than a serial EEPROM of the same density, which matters for data-logging or parameter-storage applications where write-cycle time is the bottleneck.
Infineon lists the FM25V02-DGTR as Obsolete. For a BOM line already using this exact ordering code, the existing PCB footprint and firmware are a direct match — no board spin or software change is needed when sourcing through these channels.
Package and board-fit checklist
The 8-WDFN exposed pad package (supplier device package 8-DFN, 4x4.5 mm) requires a thermal pad on the PCB for proper heat dissipation. The exposed paddle should be soldered to a copper plane — the datasheet's recommended footprint is the reference for stencil aperture and via placement. The SPI interface uses four signals (CS, SCK, SI, SO), so a 4-wire connection to the host MCU is sufficient.