## Technical Overview: M24C02-RDS3TG The **M24C02-RDS3TG** is a 2-Kbit (256 x 8 bits) serial I2C EEPROM manufactured by STMicroelectronics. It is commonly used for non-volatile parameter storage in compact electronic devices. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 Bytes) | | **Interface** | I2C (Serial 2-Wire) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (Fast Mode) / 1 MHz (Fast Mode Plus) | | **Package** | TSSOP8 (Thin Shrink Small Outline Package) | | **Operating Temperature** | -40°C to +125°C (Automotive Grade 3) | | **Write Cycles** | 4 Million cycles (typical) | | **Data Retention** | 200 Years | --- ### 2. Pin Configuration (TSSOP8) | Pin Number | Name | Type | Description | | :--- | :--- | :--- | :--- | | 1, 2, 3 | E0, E1, E2 | Input | Chip Enable (Address selection) | | 4 | Vss | Power | Ground | | 5 | SDA | I/O | Serial Data | | 6 | SCL | Input | Serial Clock | | 7 | WC | Input | Write Control (Hardware protection) | | 8 | Vcc | Power | Supply Voltage | --- ### 3. Core Functional Features * **Byte and Page Write:** Supports writing a single byte or a page of up to 16 bytes. * **Write Protection (WC Pin):** When the Write Control pin is driven High, the entire memory contents become read-only, protecting data against accidental overwrite. * **Low Power Consumption:** * Active Read Current: < 1 mA. * Standby Current: < 5 µA (at 1.8V). * **Schmitt Triggers:** Inputs are filtered to suppress noise on the SCL and SDA lines. --- ### 4. Part Number Breakdown: M24C02-RDS3TG * **M24**: I2C Serial Access EEPROM. * **C02**: 2 Kbit capacity. * **-R**: Range of supply voltage (1.8V to 5.5V). * **DS**: TSSOP8 package (ECOPACK2). * **3**: Device grade (Temperature range -40 to +125°C). * **T**: Tape and Reel packing. * **G**: Green / RoHS compliant. --- ### 5. Application Example (Pseudocode) To write data to the memory using a microcontroller (e.g., Arduino/STM32): ```cpp // Example: Writing the value 0xAB to memory address 0x10 Wire.beginTransmission(0x50); // Standard 7-bit I2C address Wire.write(0x10); // Target internal memory address Wire.write(0xAB); // Data byte to store Wire.endTransmission(); // Finalize write cycle delay(5); // Wait for internal write cycle (tW) ```