## Technical Overview of the M24C02-RMB3TG The **M24C02-RMB3TG** is a 2-Kbit serial I²C bus EEPROM (Electrically Erasable Programmable Memory) manufactured by **STMicroelectronics**. It is widely used for low-power, non-volatile data storage in consumer electronics and industrial applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 bytes organized as 256 × 8 bits) | | **Interface** | I²C Serial (Two-Wire) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (Fast Mode) / 1 MHz (Fast Mode Plus) | | **Write Cycle Time** | 5 ms (Maximum) | | **Endurance** | 4 million write cycles | | **Data Retention** | 200 years | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | --- ### 2. Functional Description The device operates as a **slave** on the I²C bus. It is accessed via a start condition, a device select code, a register address, and the data to be read or written. * **Memory Array:** The 256 bytes are divided into pages. The M24C02 supports a **16-byte page write** mode, allowing up to 16 bytes to be written in a single internal write cycle. * **Write Protection (WP):** The device includes a hardware Write Control pin. When connected to Vcc, the entire memory becomes read-only, preventing accidental data corruption. * **Operating Current:** It is highly efficient, typically drawing only **1 µA** in standby mode, making it ideal for battery-operated devices. --- ### 3. Pin Configuration (UFDFPN8) | Pin Name | Function | Description | | :--- | :--- | :--- | | **E0, E1, E2** | Chip Enable | Used to define the device's I²C address (allows up to 8 devices on the same bus). | | **SDA** | Serial Data | Bidirectional pin used to transfer data in and out. | | **SCL** | Serial Clock | Input pin used to synchronize data transfer. | | **WC** | Write Control | Hardware protection pin (High = Protected, Low = Writable). | | **Vcc / Vss** | Power | Supply voltage and Ground. | --- ### 4. Part Number Breakdown: M24C02-RMB3TG Understanding the suffix helps in identifying the specific variant: * **M24**: I²C family of EEPROMs. * **C02**: 2 Kbit density. * **-R**: Operating voltage range of 1.8V to 5.5V. * **MB**: UFDFPN8 (MLP8) package. * **3**: Range 3 temperature class (-40°C to +125°C). * **TG**: Tape and Reel packaging / Green (RoHS compliant). ---