The **M93C76-RMB3P** is a specific variant of the 8-Kbit serial MICROWIRE EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by STMicroelectronics. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Memory Size** | 8 Kbit (8192 bits) | | **Organization** | User-selectable: 1024 x 8 bits or 512 x 16 bits | | **Interface** | MICROWIRE (3-wire serial interface) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | 2 MHz (at 4.5V) / 1 MHz (at 1.8V) | | **Endurance** | 4 Million write cycles (approx.) | | **Data Retention** | 200 Years | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | --- ### 2. Detailed Part Number Breakdown The suffix **RMB3P** provides specific information regarding the physical and electrical characteristics: * **93C76**: The base model family (MICROWIRE 8Kb EEPROM). * **R**: Operating voltage range of **1.8V to 5.5V**. * **MB**: Package code for **UFDFPN8** (also known as DFN8), which is a 2x3 mm miniature surface-mount package. * **3**: Temperature range **Grade 3** (-40°C to +125°C), suitable for automotive and high-heat industrial applications. * **P**: Indicates **RoHS compliance** and Lead-free/Halogen-free construction (ECOPACK2). --- ### 3. Pin Configuration and Functions The device typically uses an 8-pin layout with the following primary signals: | Pin Name | Function | Description | | :--- | :--- | :--- | | **S** | Chip Select | Activates the device when High. | | **D** | Serial Data Input | Receives op-codes and data. | | **Q** | Serial Data Output | Outputs data during read operations. | | **C** | Serial Clock | Synchronizes data transfer. | | **ORG** | Organization Select | High = 16-bit mode; Low/Floating = 8-bit mode. | | **VCC/VSS** | Power / Ground | Power supply pins. | --- ### 4. Common Applications Due to its small footprint and high temperature rating (Grade 3), this part is frequently found in: * **Automotive Electronics:** Storing calibration data or odometer settings in ECUs. * **Industrial Sensors:** Parameter storage in high-heat environments. * **Consumer Electronics:** Configuration storage in space-constrained devices like wearables.