The **M24C08-RMB6T** is a specific variant of an Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by **STMicroelectronics**. It is widely used in consumer electronics, industrial controls, and medical devices for non-volatile data storage. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 8 Kbit (1024 x 8 bits) | | **Interface** | I²C (Inter-Integrated Circuit) | | **Clock Frequency** | 400 kHz (Fast Mode) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Operating Temperature** | -40°C to +85°C | | **Write Cycles** | 4 Million cycles (Typical) | | **Data Retention** | 200 Years | --- ### 2. Functional Description The device is organized as 4 blocks of 256 bytes (4 x 256 x 8 bits). Because the total memory is 8Kb, it uses a specific addressing scheme within the I²C protocol to navigate between these blocks. #### Device Architecture: * **Non-volatile Storage:** Retains data even when power is removed. * **Byte and Page Write:** Supports writing a single byte or a full page (up to 16 bytes) in a single write cycle. * **Write Protection (WP):** A hardware pin that, when pulled high, prevents write operations to the memory, protecting data from accidental corruption. --- ### 3. Pinout and Packaging (UFDFPN8) The "MB6T" suffix indicates the package and tape-and-reel options. The **UFDFPN8** is a very small, leadless package (2x3 mm), ideal for space-constrained applications like smartphones or wearables. | Pin Number | Name | Function | | :--- | :--- | :--- | | 1-3 | E0, E1, E2 | Chip Enable (Address inputs) | | 4 | Vss | Ground | | 5 | SDA | Serial Data (Bi-directional) | | 6 | SCL | Serial Clock (Input) | | 7 | WC | Write Control (Active High) | | 8 | Vcc | Supply Voltage | --- ### 4. Application Logic Example To communicate with the M24C08, a microcontroller acts as the Master. Below is a conceptual example of how the I²C address is formed: ```c // I2C Device Address Structure for M24C08 // [ 1 | 0 | 1 | 0 | E2 | B1 | B0 | R/W ] // E2: Hardware address pin // B1, B0: Block select bits (00, 01, 10, or 11) // R/W: Read (1) or Write (0) ```