The CY15B104Q-SXIT: ROHS3 compliant per the manufacturer, so no RoHS exemption expiry to track for EU or UKCA markets.
FRAM vs serial EEPROM — the write endurance edge
The CY15B104Q-SXIT uses Ferroelectric RAM (FRAM) — non-volatile like EEPROM, but writes at bus speed without a page buffer or erase cycle. 4Mbit organized as 512K x 8, accessed over SPI at up to 40 MHz. No wear-leveling needed: FRAM endurance is effectively unlimited compared to the 1M-cycle ceiling of serial EEPROM. For a data logger writing every 100 ms, that's the difference between a few days and the product's full service life.
Supply rail and temperature grade
Housed in the standard 8-SOIC narrow-body (5.30 mm width). Footprint matches countless existing SPI EEPROM and NOR flash layouts — no board respin for a drop-in FRAM swap.