## Technical Overview of the M24C01-RMB3T The **M24C01-RMB3T** is a 1-Kbit serial I2C bus EEPROM (Electrically Erasable Programmable Memory) manufactured by **STMicroelectronics**. It is designed for low-power applications where small-form-factor non-volatile memory is required. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the device: | Feature | Specification | | :--- | :--- | | **Memory Size** | 1 Kbit (128 bytes x 8 bits) | | **Interface** | I2C (2-wire serial) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz | | **Write Cycle Time** | 5 ms (Max) | | **Data Retention** | 40 Years | | **Endurance** | 1 Million Write Cycles | | **Package Type** | UFDFPN8 (Ultra Thin Fine Pitch Dual Flat No-lead) | --- ### 2. Pin Configuration (UFDFPN8) The device typically uses a small 8-pin package. The functions of the pins are as follows: 1. **E0, E1, E2:** Chip Enable inputs (used to set the device address on the I2C bus). 2. **VSS:** Ground. 3. **SDA:** Serial Data (bidirectional). 4. **SCL:** Serial Clock. 5. **WC:** Write Control (Hardware protection; if connected to VCC, write operations are inhibited). 6. **VCC:** Supply Voltage. --- ### 3. Core Features and Functionality #### I2C Interface The device operates as a slave on the I2C bus. It follows the standard protocol where the Master initiates communication via a Start condition, sends the Device Select Code, and then the memory address. #### Write Protection The **WC (Write Control)** pin provides hardware data protection. - When **WC is Low (0)**: The entire memory is writable. - When **WC is High (1)**: The memory is write-protected (Read-only mode). #### Low Power Consumption The "R" in the part number signifies the voltage range (1.8V to 5.5V), making it ideal for battery-powered devices. It features a standby current often lower than 1 $\mu$A. --- ### 4. Part Number Breakdown: M24C01-RMB3T | Code | Meaning | | :--- | :--- | | **M24** | I2C Serial Access EEPROM | | **C01** | 1 Kbit Capacity | | **-R** | 1.8V to 5.5V Operating Voltage | | **MB** | UFDFPN8 Package (2x3 mm) | | **3** | Range 3 Temperature (-40 to +125 °C) | | **T** | Tape & Reel Packing | ---