The STMicroelectronics M24C04-WMN6T is a 4Kbit serial EEPROM organized as 512 x 8 bits, communicating over an I²C bus at up to 400 kHz. The 900 ns access time and 5 ms write cycle (word or page) suit configuration storage, calibration data, and small parameter logs in industrial and consumer equipment.
Obsolete — plan for replacement or surplus sourcing
Supply voltage range and logic compatibility
Rated for 2.5V to 5.5V supply, this EEPROM works directly with 3.3V and 5V microcontrollers and ASICs. The I²C interface is open-drain, so pull-up resistors should be sized for the bus capacitance and supply voltage — 4.7 kΩ is typical for a 400 kHz bus at 5V. No level shifter is needed when mixing 3.3V and 5V domains on the same I²C bus, as long as the pull-up voltage matches the higher supply.