## Overview of M24C02-RDS6T The **M24C02-RDS6T** is a 2-Kbit (256 x 8-bit) serial Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by **STMicroelectronics**. It is widely used for non-volatile parameter storage in low-power consumer and industrial electronics. ### Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 2 Kbit (256 bytes) | | **Interface** | I²C Serial (2-wire) | | **Clock Frequency** | 400 kHz (Fast Mode) | | **Supply Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Package Type** | TSSOP8 (Thin Shrink Small Outline Package) | | **Operating Temperature** | -40°C to +85°C | | **Write Endurance** | 4 million cycles | | **Data Retention** | 200 years | --- ### Pin Configuration and Functions The device is housed in a small 8-pin TSSOP package. Below is the pinout description: 1. **E0, E1, E2 (Inputs):** Chip Enable inputs used to define the device's I²C address. This allows up to 8 similar devices to be connected to the same bus. 2. **VSS (Ground):** The 0V reference point. 3. **SDA (I/O):** Serial Data. This is a bidirectional pin used to transfer addresses and data into and out of the device. 4. **SCL (Input):** Serial Clock. Used to synchronize all data transfers. 5. **WC (Input):** Write Control. When connected to $V_{CC}$, write operations are inhibited (hardware write protection). When connected to $V_{SS}$, the entire memory is writable. 6. **VCC (Power):** Supply voltage. --- ### Core Functional Features * **Byte and Page Write:** The chip supports writing a single byte or a page of up to 16 bytes. Page writes are significantly faster than writing 16 individual bytes. * **Random and Sequential Read:** Data can be read from a specific address or sequentially by incrementing the internal address counter automatically. * **Low Power Consumption:** * Active Read Current: 1 mA (max) * Standby Current: 1 µA (max) * **Schmitt Trigger Inputs:** Used for noise filtering on the SCL and SDA lines to ensure stable communication in noisy environments. --- ### Typical Application Circuit To interface the M24C02-RDS6T with a microcontroller (MCU), the following hardware considerations are necessary: ```cpp // Schematic Logic Connection MCU (SDA) <------> M24C02 (SDA) [With 4.7k Pull-up Resistor] MCU (SCL) -------> M24C02 (SCL) [With 4.7k Pull-up Resistor] MCU (GPIO) ------> M24C02 (WC) [Optional: Control Write Protect] ``` 1. **Pull-up Resistors:** Since I²C is open-drain, resistors (typically 4.7kΩ or 10kΩ) are required on the SDA and SCL lines. 2. **Decoupling Capacitor:** A 0.1µF ceramic capacitor should be placed close to the $V_{CC}$ pin to filter high-frequency noise.