32 Kbit I²C EEPROM in a 0.80 × 0.67 mm WLCSP
The STMicroelectronics M24C32-FCU6TP/TF is a 32 Kbit serial EEPROM with an I²C interface, organized as 4K × 8 bits. The 450 ns access time and 5 ms write cycle are standard for this density class. The part is packaged in a 4-bump WLCSP (0.80 × 0.67 mm), making it a fit for space-constrained designs like wearable devices, wireless modules, and sensor nodes where board real estate is at a premium.
Obsolete — what that means for sourcing
The M24C32-FCU6TP/TF is listed as Obsolete. Date codes and traceability vary — each reel should be screened before it hits the line. If volume or long-term support is required, a pin-compatible alternative in the M24C32 family with the same WLCSP footprint may be available; that should be confirmed against the board's layout and supply rails.
Package reality — WLCSP assembly considerations
The PCB land pattern must match the ST-recommended footprint exactly; there is no room for a fan-out. The package is MSL 1 typically, but verify the bag date code before reflow.