### M24C01-RBN3TP/G Technical Overview The **M24C01-RBN3TP/G** is a low-voltage, 1-Kbit I²C-compatible serial EEPROM (Electrically Erasable Programmable Memory) manufactured by STMicroelectronics. It is designed for applications requiring small amounts of non-volatile data storage. --- ### Key Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 1 Kbit (128 bytes) | | **Organization** | 128 x 8 bits | | **Interface** | I²C (Inter-Integrated Circuit) | | **Clock Frequency** | 400 kHz | | **Operating Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Operating Temperature** | -40°C to +125°C (Automotive/Industrial Grade) | | **Package Type** | SOT23-5 | | **Write Cycles** | 4 million cycles | | **Data Retention** | 200 years | --- ### Component Features 1. **I²C Serial Interface:** Uses a two-wire serial interface (SCL for clock, SDA for data). This reduces the number of pins required on the microcontroller. 2. **Low Power Consumption:** Optimized for battery-powered devices, with very low active and standby currents. 3. **Byte and Page Write:** Supports writing a single byte or a page of up to 16 bytes. 4. **Write Protection:** It features a hardware Write Control (WC) pin to prevent accidental data overwriting. 5. **Robustness:** High endurance (4 million cycles) makes it suitable for frequently updated parameters like sensor calibration data or user settings. --- ### Pin Configuration (SOT23-5) Typical pinout for this specific package: | Pin | Name | Function | | :--- | :--- | :--- | | 1 | **SCL** | Serial Clock Input | | 2 | **VSS** | Ground | | 3 | **SDA** | Serial Data Input/Output (Open Drain) | | 4 | **VCC** | Power Supply | | 5 | **WC** | Write Control (Low = Write enabled; High = Write protected) | --- ### Practical Application Example Below is a simple pseudo-code example of how a microcontroller might address this chip using I²C: ```c // Define the 7-bit device address (Typical for M24C01) #define M24C01_ADDR 0xA0 void write_byte(uint8_t mem_addr, uint8_t data) { I2C_Start(); I2C_Send(M24C01_ADDR | 0); // Device Address + Write bit I2C_Send(mem_addr); // Target memory location I2C_Send(data); // Data to store I2C_Stop(); delay_ms(5); // Internal write cycle time } ```