### M24C64-RMB3TGP Overview The **M24C64-RMB3TGP** is a specific variant of the M24C64 series manufactured by STMicroelectronics. It is a 64-Kbit (8192 x 8 bits) serial I²C Electrically Erasable Programmable Read-Only Memory (EEPROM). --- ### Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 64 Kbit (8,192 bytes) | | **Interface** | I²C (Inter-Integrated Circuit) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (Fast Mode) / 1 MHz (Fast Mode Plus) | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Operating Temp** | -40°C to +125°C | | **Endurance** | 4 Million write cycles | | **Data Retention** | 200 Years | --- ### Internal Functional Blocks 1. **Memory Array:** Organized as 8192 bytes, typically split into pages for writing. 2. **I²C Control Logic:** Handles the start/stop conditions, device addressing, and acknowledgment bits. 3. **Address Registers:** Manages the 13-bit internal address needed to access the 64-Kbit space. 4. **Write Protection (WP):** A hardware pin that, when pulled high, prevents write operations to the memory to ensure data integrity. --- ### Part Number Breakdown The suffix `RMB3TGP` provides specific manufacturing details: * **M24C64:** Base part number (64 Kbit I²C EEPROM). * **-R:** Operating voltage range (1.8V to 5.5V). * **MB:** Package type (UFDFPN8, 2x3 mm). * **3:** Device grade (Range 3, -40 to +125 °C). * **TG:** Tape & Reel packing. * **P:** ECOPACK2 (RoHS compliant/Lead-free). --- ### Typical Application Circuit The M24C64 requires pull-up resistors on the SDA and SCL lines and decoupling capacitors for the power supply. ```cpp // Typical I2C Addressing Example (Pseudo-code) #define EEPROM_ADDR 0x50 // Base 7-bit address void writeEEPROM(uint16_t memAddress, uint8_t data) { Wire.beginTransmission(EEPROM_ADDR); Wire.write((int)(memAddress >> 8)); // MSB of Address Wire.write((int)(memAddress & 0xFF)); // LSB of Address Wire.write(data); // Write Data Byte Wire.endTransmission(); delay(5); // Internal Write Cycle Time } ```