The STMicroelectronics M24C16-WMN6 is a 16Kbit serial EEPROM with an I2C interface, organized as 2K x 8 bits. Its 900 ns access time and 400 kHz clock frequency define the read-cycle timing on the bus — at 400 kHz the SCL period is 2.5 µs, so the 900 ns access leaves roughly 1.6 µs for the slave to present data after the address byte, which is comfortable for most MCU I2C peripherals running at standard or fast mode.
Obsolete — planning the replacement path
This means STMicroelectronics has ceased production — no last-time-buy window remains open. Confirm pin-compatibility and timing with the M24C16-WMN6T datasheet before requalifying.
Write-cycle timing and endurance context
The write cycle time is 5 ms for a word or page write. At 400 kHz, a page write (up to 16 bytes) takes the 5 ms plus the I2C addressing overhead — roughly 6 ms total per page. For firmware-update or parameter-storage applications, budget this non-volatile write latency in the state machine. The 16Kbit density suits configuration storage, calibration constants, or small data logs where the I2C bus is already present for other peripherals.