## Technical Overview: M24C02-RDS6TP The **M24C02-RDS6TP** is a 2-Kbit serial I²C (Inter-Integrated Circuit) EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by **STMicroelectronics**. It is widely used for non-volatile parameter storage in space-constrained applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 bytes organized as 256 x 8 bits) | | **Interface** | I²C Serial (2-wire) | | **Supply Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (Fast Mode) | | **Package Type** | TSSOP8 (Thin Shrink Small Outline Package) | | **Operating Temp** | -40°C to +85°C | | **Endurance** | 4 Million Write Cycles | | **Data Retention** | 200 Years | --- ### 2. Functional Electronic Components The internal architecture of the M24C02-RDS6TP consists of several critical stages: 1. **Memory Array:** 256 bytes of non-volatile cells. 2. **I²C Control Logic:** Manages the communication protocol, including Start/Stop conditions and 8-bit data transfers. 3. **Device Addressing:** Uses a fixed 4-bit code (`1010`) followed by 3 hardware-configurable address pins ($E_0, E_1, E_2$), allowing up to 8 devices on the same I²C bus. 4. **Write Protection (WP):** A dedicated hardware pin that, when tied to $V_{CC}$, protects the entire memory contents from being overwritten. 5. **Charge Pump:** An internal voltage multiplier that generates the high voltage required to program (write) the EEPROM cells from the low $V_{CC}$ supply. --- ### 3. Pin Configuration (TSSOP8) | Pin No. | Name | Function | | :--- | :--- | :--- | | 1, 2, 3 | E0, E1, E2 | Chip Enable (Address Inputs) | | 4 | $V_{SS}$ | Ground | | 5 | SDA | Serial Data (Bidirectional) | | 6 | SCL | Serial Clock (Input) | | 7 | WP | Write Control (Active High) | | 8 | $V_{CC}$ | Supply Voltage | --- ### 4. Implementation Example In a typical microcontroller circuit, the SDA and SCL lines require external pull-up resistors (usually 4.7kΩ to 10kΩ) because they are open-drain outputs. ```c // Pseudo-code for writing a byte to M24C02 I2C_Start(); I2C_Write(0xA0); // Device Address (Write mode) I2C_Write(0x05); // Memory Address (Byte 5) I2C_Write(0x42); // Data to store (0x42) I2C_Stop(); ``` --- ### 5. Part Number Breakdown * **M24**: I²C family of EEPROM. * **C02**: 2-Kbit density. * **R**: Operating voltage range (1.8V to 5.5V). * **D**: Process technology/Generation. * **S**: Package (TSSOP8). * **6**: Temperature range (-40°C to +85°C). * **TP**: Tape and Reel packaging.