## Overview of the M24C64-RMB6TG The **M24C64-RMB6TG** is a 64-Kbit serial I²C (Inter-Integrated Circuit) Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by STMicroelectronics. It is designed for low-power, low-voltage applications, typically used for parameter storage in portable devices. --- ### Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 64 Kbit (8,192 x 8 bits) | | **Interface** | I²C (2-wire serial) | | **Clock Frequency** | Up to 1 MHz (Fast-Mode Plus) | | **Operating Voltage** | 1.8V to 5.5V | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | | **Operating Temp** | -40°C to +85°C | | **Write Cycles** | 4 Million cycles | | **Data Retention** | 200 Years | --- ### Core Electronic Characteristics #### 1. Communication Protocol (I²C) The device operates as a slave on the I²C bus. It uses a bidirectional Data line (**SDA**) and a Clock line (**SCL**). It supports: * **Byte Write:** Writing a single 8-bit byte. * **Page Write:** Writing up to 32 bytes in a single burst. * **Random Read / Sequential Read:** Flexible data retrieval. #### 2. Power Management The "**-R**" suffix in the part number indicates a specific voltage range (1.8V to 5.5V). This makes it ideal for battery-powered electronics where power efficiency is critical. The standby current is exceptionally low (typically less than 2 µA). #### 3. Write Protection The chip includes a **WC (Write Control)** pin. * If **WC** is high (connected to Vcc), the memory is write-protected (read-only mode). * If **WC** is low (connected to Ground), the memory can be written to. #### 4. Hardware Address Inputs The device features chip enable pins (E0, E1, E2), allowing up to **eight** M24C64 devices to be connected to the same I²C bus by assigning each a unique hardware address. --- ### Pin Configuration (UFDFPN8) | Pin | Name | Description | | :--- | :--- | :--- | | 1-3 | E0, E1, E2 | Chip Enable (Address Inputs) | | 4 | Vss | Ground | | 5 | SDA | Serial Data | | 6 | SCL | Serial Clock | | 7 | WC | Write Control | | 8 | Vcc | Supply Voltage | --- ### Common Applications * **Consumer Electronics:** Storing user settings in smartwatches or cameras. * **Medical Devices:** Calibration data storage in portable monitors. * **Industrial:** Storing configuration parameters and identification codes.