The **M9346-RBN3T** is a specific part number typically associated with high-performance **Magnetic Random Access Memory (MRAM)**, manufactured by Everspin Technologies. This component belongs to the 16Mb family of serial MRAM devices. --- ### 1. Technical Specifications The following table outlines the primary electrical and technical characteristics of the M9346-RBN3T: | Feature | Specification | | :--- | :--- | | **Memory Type** | MRAM (Magnetoresistive RAM) | | **Memory Size** | 16 Megabits (2MB x 8) | | **Interface** | Quad SPI (QSPI) / Serial SPI | | **Operating Voltage** | 2.7V to 3.6V | | **Clock Speed** | Up to 108 MHz | | **Endurance** | Unlimited Read/Write cycles | | **Data Retention** | 20+ Years | | **Package** | 8-pad WSON (Small Outline No-lead) | --- ### 2. Key Electronic Features #### Non-Volatility with SRAM Performance Unlike Flash memory, which requires a "write" or "erase" cycle that wears down the hardware, MRAM uses magnetic states to store data. This allows the M9346-RBN3T to function like an SRAM (high speed, infinite endurance) while retaining data without power like a Flash drive. #### High-Speed Interface The device supports **Single, Dual, and Quad SPI** modes. The Quad SPI interface allows for high-throughput data transfers, making it suitable for applications where large amounts of data must be logged or retrieved instantly. #### Data Integrity and Protection - **Hardware Write Protection:** Includes physical pins to prevent accidental data overwrites. - **Software Protection:** Includes block protection bits to lock specific memory regions. --- ### 3. Application Use Cases Because of its unique combination of speed and non-volatility, this part is commonly used in: 1. **Industrial Automation:** Storing real-time configuration data and system state variables that change frequently. 2. **Medical Devices:** Critical data logging where power loss cannot result in data corruption. 3. **Data Centers:** Buffer memory for RAID controllers or high-speed journaling. 4. **Automotive:** Storing sensor data and calibration maps. --- ### 4. Comparison: MRAM vs. Other Technologies | Feature | MRAM (M9346) | Flash (NOR/NAND) | EEPROM | | :--- | :--- | :--- | :--- | | **Write Speed** | Very Fast (Instant) | Slow (ms) | Slow (ms) | | **Endurance** | Unlimited | 10k - 100k cycles | 1M cycles | | **Power Consumption** | Low | High (during write) | Moderate | ---