8Kbit I²C EEPROM in SOIC-8
The STMicroelectronics M24C08-WMN6TP is an 8Kbit serial EEPROM organized as 1K x 8 bits, accessed via an I²C interface running up to 400 kHz.
NRND lifecycle — what it means for the BOM
STMicroelectronics lists the M24C08-WMN6TP as NRND (Not Recommended for New Designs). This means the part is still available for existing production but is not intended for new board spins. For a BOM line already using this order code, the NRND flag signals that qualifying a drop-in alternative or a second source should be on the roadmap before the next production run. The M24C08 family has multiple active siblings in the same SOIC-8 footprint that share the I²C protocol and supply range — a pin-compatible migration is feasible without a board layout change.
Interface timing and write endurance
The I²C bus clock is rated at 400 kHz (Fast Mode), giving a byte-read cycle time dominated by the 900 ns access time. For a full-page write, the internal write cycle takes 5 ms typical — the master must wait this period before addressing the device again, either by polling the acknowledge or inserting a delay. As a serial EEPROM, it supports 1 million erase/write cycles per byte with 40-year data retention at 25°C. The 8Kbit density suits parameter storage, calibration constants, and boot configuration data where occasional field updates are needed.