## Overview of the M24C64-RMB6TG The **M24C64-RMB6TG** is a 64-Kbit serial I2C bus EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by **STMicroelectronics**. It is designed for low-voltage applications and is commonly used for parameter storage in consumer electronics, medical devices, and industrial modules. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Memory Size** | 64 Kbit (8,192 x 8 bits) | | **Interface** | I2C (Two-Wire Serial) | | **Supply Voltage (Vcc)** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (Fast Mode), 1 MHz (Fast Mode Plus) | | **Package Type** | UFDFPN8 (MLP8) - Ultra-thin Fine Pitch Dual Flat No-lead | | **Operating Temperature** | -40°C to +85°C | | **Write Cycles** | More than 4 million cycles | | **Data Retention** | Over 200 years | --- ### 2. Pin Configuration (UFDFPN8) | Pin Number | Name | Description | | :--- | :--- | :--- | | 1, 2, 3 | E0, E1, E2 | Chip Enable (Address inputs to allow up to 8 devices on one bus) | | 4 | Vss | Ground | | 5 | SDA | Serial Data (Bi-directional) | | 6 | SCL | Serial Clock | | 7 | WC | Write Control (Hardware protection) | | 8 | Vcc | Supply Voltage | --- ### 3. Core Functional Features * **Byte and Page Write:** Supports writing a single byte or a full page (up to 32 bytes) in a single write cycle. * **Hardware Write Protection:** The `WC` (Write Control) pin can be used to protect the entire memory contents from being overwritten when connected to Vcc. * **Low Power Consumption:** * **Write Current:** 2 mA * **Read Current:** 0.4 mA * **Standby Current:** 1 µA (at 1.8V) * **Random and Sequential Read:** Allows the host to read data starting from any memory address, either one byte at a time or in a continuous stream. --- ### 4. Implementation Example To communicate with the M24C64, an MCU (like an Arduino or STM32) must send a 7-bit device address followed by a Read/Write bit. The default device ID for this EEPROM is typically `1010` followed by the states of the E2, E1, and E0 pins. ```cpp // Example: Basic I2C Address Structure // Binary: 1 0 1 0 E2 E1 E0 R/W // If E2, E1, E0 are grounded: #define EEPROM_ADDR 0x50 // 01010000 in 7-bit format ``` --- ### 5. Part Number Breakdown: M24C64-RMB6TG * **M24**: I2C Serial Access EEPROM. * **C64**: 64 Kbit capacity. * **-R**: 1.8V to 5.5V operating voltage range. * **MB**: UFDFPN8 package (2x3 mm). * **6**: Industrial temperature range (-40 to 85°C). * **TG**: Tape and Reel packing with RoHS compliant/Green finishes.