### M24M01-RMW3TP/A: Technical Overview The **M24M01-RMW3TP/A** is a high-density, low-power Serial I²C Bus EEPROM (Electrically Erasable Programmable Memory) manufactured by **STMicroelectronics**. It is designed for applications requiring large non-volatile storage in a small footprint. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 1 Megabit (128 KB) | | **Interface** | I²C (Inter-Integrated Circuit) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | 1 MHz (Fast-mode Plus), 400 kHz, or 100 kHz | | **Package Type** | MLP (UFDFPN8) - 2x3 mm | | **Operating Temperature** | -40°C to +85°C | | **Write Cycles** | 4 million cycles (at 25°C) | | **Data Retention** | 200 years | --- ### 2. Functional Description The device operates as a slave in the I²C protocol. It is organized as $128,768 \times 8$ bits. #### A. Internal Memory Organization * **Page Size:** 256 bytes. This allows for efficient "Page Write" operations where up to 256 bytes can be written in a single command cycle. * **Addressing:** Requires two 8-bit address bytes to navigate the 1Mb space. #### B. Pin Configuration (UFDFPN8) * **E2:** Chip Enable bit (used to address multiple devices on the same bus). * **SDA / SCL:** Serial Data and Serial Clock for I²C communication. * **WC (Write Control):** A hardware protection pin. If tied to Vcc, the memory becomes write-protected. If tied to Vss (Ground), the memory is writable. * **Vcc / Vss:** Power supply and Ground. --- ### 3. Key Features * **Byte and Page Write:** Supports writing a single byte or a full 256-byte page. * **Random and Sequential Read:** Data can be read starting from any address or sequentially through the entire memory. * **Self-Timed Write Cycle:** The internal write cycle is typically 5ms, during which the device ignores further commands until completion. * **Schmitt Triggers:** Inputs are filtered for noise suppression to ensure stable communication in noisy environments. * **Enhanced ESD Protection:** Designed to withstand high Electrostatic Discharge, making it robust for industrial use. --- ### 4. Typical Applications * **Parameter Storage:** Storing calibration data or user preferences in consumer electronics. * **Medical Devices:** Storing patient logs or device history. * **Industrial:** Storing configuration settings for PLCs or sensors. * **Telecommunications:** Used in modules for firmware storage or ID information. ---