The **M24C02-RMB6TG** is a high-performance, low-voltage Serial I2C (Inter-Integrated Circuit) Electrically Erasable Programmable Read-Only Memory (EEPROM). It is manufactured by STMicroelectronics and is commonly used for storing small amounts of data that must be saved when power is removed. --- ## 1. Key Technical Specifications The table below summarizes the core electrical and physical characteristics: | Feature | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 bytes x 8 bits) | | **Interface** | I2C (Standard, Fast, and Fast-mode Plus) | | **Clock Frequency** | Up to 1 MHz | | **Operating Voltage** | 1.8V to 5.5V | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Write Cycle Time** | 5 ms (Max) | | **Endurance** | 4 Million Write Cycles | | **Data Retention** | 200 Years | --- ## 2. Pin Configuration (UFDFPN8) The device typically uses a small 8-pin footprint. Below are the functional descriptions of the pins: * **E0, E1, E2 (Inputs):** Chip Enable. These pins allow you to set the hardware address of the chip, enabling multiple EEPROMs to be connected to the same I2C bus. * **SDA (I/O):** Serial Data. Used to transfer data in and out of the device. * **SCL (Input):** Serial Clock. Synchronizes the data transfer. * **WC (Input):** Write Control. A hardware protection pin. When connected to $V_{CC}$, write operations are inhibited. When connected to $V_{SS}$ (Ground), write operations are allowed. * **Vcc / Vss:** Power supply and Ground. --- ## 3. Core Functionalities ### Memory Architecture The 2 Kbit memory is organized as 256 words of 8 bits each. Internally, the device uses a page-write structure, allowing up to 16 bytes to be written in a single instruction cycle. ### I2C Protocol It operates as a "Slave" on the I2C bus. It supports: - **Byte Write:** Writing a single byte to a specific address. - **Page Write:** Writing up to 16 bytes. - **Random Address Read:** Reading from a specific location. - **Sequential Read:** Reading the entire memory content in one stream. ### Data Protection The **WC (Write Control)** pin is a critical safety feature for industrial and automotive applications. It prevents accidental data corruption due to noise or software errors by physically locking the memory against write commands. --- ## 4. Typical Applications Because of its tiny footprint (UFDFPN8) and low power consumption, it is ideal for: - **Consumer Electronics:** Storing user settings in cameras or headphones. - **Medical Devices:** Storing calibration data. - **Industrial:** Parameter storage for sensors and small controllers. - **Module Identification:** Storing serial numbers and version info on PCB modules.