The part number **M2REB-RB3-R2/Q** typically refers to a high-frequency, precision **Quartz Crystal Oscillator** or a specific **Crystal Unit** used in timing circuits. These components are essential for providing a stable clock signal to microprocessors and communication interfaces. --- ### 1. Component Specification Overview While specific manufacturer prefixes can vary, the nomenclature generally breaks down into the following electronic characteristics: | Feature | Specification Details | | :--- | :--- | | **Component Type** | SMD (Surface Mount Device) Quartz Crystal | | **Package Size** | Typically 3.2 x 2.5 mm or 2.5 x 2.0 mm (standard REB footprint) | | **Frequency Stability** | High precision (usually ±10ppm to ±30ppm) | | **Load Capacitance** | Standardized (e.g., 8pF, 10pF, or 12pF) | | **Operating Temp** | Extended Industrial range (-40°C to +85°C) | | **RoHS Status** | Compliant (Lead-free) | --- ### 2. Key Electronic Parts & Materials The internal construction of this component involves several specialized materials to ensure frequency accuracy: 1. **The Quartz Blank:** A thin slice of synthetic quartz cut at a specific angle (usually AT-cut) to determine the vibration frequency. 2. **Electrodes:** Gold or Silver layers sputtered onto the quartz surface to allow electrical excitation via the piezoelectric effect. 3. **Conductive Adhesive:** Specialized epoxy used to mount the quartz blank to the ceramic base while maintaining electrical contact. 4. **Ceramic Package:** A multi-layer alumina (Al2O3) base that provides insulation and structural integrity. 5. **Kovar/Metal Lid:** A metal cap seam-welded to the base to create a vacuum-sealed or nitrogen-filled hermetic environment. --- ### 3. Circuit Application In an electronic schematic, this part functions as the "heartbeat" of the system. ```mermaid graph LR A[Inverter Input] --> B[M2REB Crystal] B --> C[Inverter Output] C --> D[System Clock/MCU] B --- E[Load Capacitor 1] B --- F[Load Capacitor 2] ``` #### Typical Usage: * **Microcontrollers:** Providing the fundamental clock for execution. * **Wireless Modules:** Ensuring Bluetooth or Wi-Fi carrier waves remain within legal frequency bands. * **Automotive Electronics:** Used in ADAS or Infotainment systems where temperature stability is critical. --- ### 4. Part Number Breakdown (General Convention) * **M2REB:** Series identifier (Specific to the manufacturer's low-profile ceramic line). * **RB3:** Frequency and Tolerance coding. * **R2:** Packaging code (usually indicates Tape & Reel quantity, e.g., 2000 or 3000 pcs). * **/Q:** Quality grade (Automotive grade AEC-Q200 or specific high-reliability testing).