The **AWSCR-MS** is a specific series of **Ceramic Resonators** manufactured by Abracon. These components are used to provide a stable clock signal or frequency reference for microcontrollers and other digital circuits. --- ## 1. Technical Specifications The AWSCR-MS series is characterized by its surface-mount design and built-in load capacitors, which simplify the PCB layout. | Feature | Description | | :--- | :--- | | **Component Type** | Piezoelectric Ceramic Resonator | | **Mounting Type** | SMD (Surface Mount Device) | | **Frequency Range** | Typically 2.00 MHz to 12.00 MHz | | **Built-in Capacitance** | Includes internal load capacitors (typically 22pF or 30pF) | | **Frequency Tolerance** | Approximately ±0.5% | | **Operating Temperature** | -25°C to +85°C (Standard) | --- ## 2. Key Internal Components Unlike a simple crystal, the AWSCR-MS integrates three functional elements into one small package: 1. **Ceramic Element:** A lead zirconate titanate (PZT) material that vibrates at a specific frequency when an electric field is applied. 2. **Electrodes:** Metallic layers that interface the ceramic element with the external pins. 3. **Internal Load Capacitors:** This is what the **"C"** in AWS**C**R often denotes. By integrating capacitors internally, the part saves space and reduces the "BOM" (Bill of Materials) count. --- ## 3. Pin Configuration The device typically features **3 pins**: * **Pin 1 (Input/Output):** Connected to the oscillator circuit of the MCU. * **Pin 2 (Ground):** Connected to the system ground (common for the internal capacitors). * **Pin 3 (Output/Input):** Connected to the other side of the MCU oscillator circuit. --- ## 4. Comparison: Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (AWSCR) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | | **Cost** | Low | High | | **Start-up Time** | Very Fast | Slower | | **Size** | Small (due to built-in caps) | Larger (requires external caps) | --- ## 5. Typical Applications The AWSCR-MS series is ideal for applications where extreme precision (like a high-speed clock or GPS) isn't required, but cost and space are critical: * **Consumer Electronics:** Remote controls, toys, and kitchen appliances. * **Microcontrollers:** Providing the main system clock for 8-bit or 16-bit MCUs. * **Automotive:** Non-safety critical systems like power windows or mirror controls.