The M24C64-U is a 64-Kbit I²C-compatible EEPROM (electrically erasable programmable memory) organized as 8 K × 8 bits. It can operate with a supply voltage of 1.7 V to 5.5 V, over an ambient temperature range from -40 °C to +85 °C. The device offers an additional page, named the identification page (32 bytes). This page stores an 128‑bit (16 bytes) unique factory-programmed serial number, which is frozen in read-only mode on delivery from the factory. The uniqueness of the serial number is ensured across the whole portfolio of serial EEPROMs manufactured by STMicroelectronics, offering a unique identifier. https://elecena.pl/product/28020613/m24c64-ufmn6tp-64-kbit-serial-i2c-bus-eeprom-with-unique-identifier 2025-03-14 https://elecena.pl/product/28020613/m24c64-ufmn6tp-64-kbit-serial-i2c-bus-eeprom-with-unique-identifier 2026-02-23