The **M93C56-RMB3TP** is a specific type of Non-Volatile Memory (NVM) produced by STMicroelectronics. It belongs to the Microwire bus interface family and is widely used for storing configuration data, calibration parameters, and user settings. --- ### 1. General Specifications | Feature | Details | | :--- | :--- | | **Memory Size** | 2 Kbit (2048 bits) | | **Organization** | Configurable as 256 x 8 bits or 128 x 16 bits | | **Interface** | Microwire (3-wire serial interface) | | **Operating Voltage** | 1.8V to 5.5V | | **Clock Frequency** | Up to 2 MHz | | **Package Type** | UFDFPN8 (Ultra-thin Fine pitch Dual Flat No-lead) | --- ### 2. Key Electronic Characteristics #### A. Power Management * **Low Consumption:** Designed for battery-operated devices with a very low operating current (approx. 1 mA) and a standby current of less than 1 µA at 1.8V. * **Wide Voltage Range:** The "-R" suffix indicates the device can operate down to 1.8V, making it compatible with low-power microcontrollers. #### B. Endurance and Data Retention * **Write Cycles:** Supports more than 1 million write cycles per byte. * **Data Retention:** Guaranteed for more than 40 years, ensuring long-term reliability for industrial or automotive applications. #### C. Pinout Configuration (UFDFPN8) | Pin | Name | Description | | :--- | :--- | :--- | | 1 | **S** | Chip Select (Active High) | | 2 | **C** | Serial Clock | | 3 | **D** | Serial Data Input | | 4 | **Q** | Serial Data Output | | 5 | **Vss** | Ground | | 6 | **F** | ORG (Organization: High = x16, Low/Float = x8) | | 7 | **DU** | Don't Use / No Connection | | 8 | **Vcc** | Supply Voltage | --- ### 3. Functional Operation The device operates using a simple instruction set transmitted via the **D** pin. ```c // Example Logical Flow for a Read Operation 1. Set Chip Select (S) HIGH. 2. Send "Read" opcode (110). 3. Send the Address of the memory location. 4. Data is clocked out on the Q pin. 5. Set Chip Select (S) LOW to terminate. ``` --- ### 4. Part Number Breakdown: M93C56-RMB3TP * **M93**: Family (Microwire Serial EEPROM) * **C56**: Density (2 Kbit) * **-R**: Voltage range (1.8V to 5.5V) * **MB**: Package (UFDFPN8 2x3 mm) * **3**: Temperature range (-40°C to +125°C / Automotive Grade) * **TP**: Packing (Tape and Reel)