The **M24C64-RMB5** is a specific variant of the 64-Kbit I²C (Inter-Integrated Circuit) Serial EEPROM manufactured by **STMicroelectronics**. It is designed for low-power and low-voltage applications. --- ## 1. Technical Specifications The following table summarizes the key electrical and physical parameters of the M24C64-RMB5: | Parameter | Value | | :--- | :--- | | **Memory Size** | 64 Kbits (8192 x 8 bits) | | **Interface** | I²C (Two-Wire Serial) | | **Operating Voltage ($V_{CC}$)** | 1.8V to 5.5V | | **Clock Frequency** | 400 kHz (at 1.8V), 1 MHz (at 2.5V+) | | **Write Cycle Time** | 5 ms (Maximum) | | **Data Retention** | 40 Years | | **Endurance** | 4 Million Write Cycles | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Features The "RMB5" suffix indicates specific attributes related to packaging and performance: ### Memory Architecture * **Byte and Page Write:** Supports writing a single byte or a full page (32 bytes) in one cycle. * **Random and Sequential Read:** Allows for reading data from any address or streaming data sequentially. ### Device Protection * **Write Control (WC) Pin:** A hardware pin used to protect the entire memory from accidental write instructions. * **Schmitt Triggers:** Integrated on inputs for noise filtering (improving signal integrity on the I²C bus). ### Package Information (UFDFPN8) The **MB** in the part number typically refers to the **UFDFPN8** (also known as DFN8) package. This is a very thin, leadless package (2x3 mm) ideal for space-constrained mobile or wearable devices. The **5** indicates the finishing/plating or a specific manufacturing process flow. --- ## 3. Pin Configuration The device usually comes in an 8-pin layout: 1. **E0, E1, E2:** Chip Enable inputs (allows up to 8 devices on the same I²C bus). 2. **VSS:** Ground. 3. **SDA:** Serial Data (Bi-directional). 4. **SCL:** Serial Clock. 5. **WC:** Write Control (Active High). 6. **VCC:** Supply Voltage. --- ## 4. Typical Applications Due to its low power consumption and small footprint, the M24C64-RMB5 is commonly found in: * **Consumer Electronics:** Smartphone camera modules, Bluetooth headsets. * **Computing:** Configuration storage for small microcontrollers. * **Medical:** Portable diagnostic tools. * **Industrial:** Parameter storage for sensors.