The **CSTCE9M00G55-R0** is a specific model of a **Ceramic Resonator** manufactured by Murata Manufacturing. It belongs to the CERALOCK® family and is designed to provide a stable clock signal for microcontrollers and other digital circuits. --- ### 1. Technical Specifications The part number encodes specific data regarding its performance and physical characteristics. | Feature | Specification | | :--- | :--- | | **Oscillation Frequency** | 9.000 MHz | | **Frequency Tolerance** | ±0.5% | | **Temperature Stability** | ±0.3% (within operating range) | | **Built-in Load Capacitance** | 33 pF | | **Operating Temperature** | -20°C to +80°C | | **Package Type** | SMD (Surface Mount Device) | | **Size/Dimensions** | 3.2 x 1.3 mm | --- ### 2. Key Components and Design The "CSTCE" series is characterized by its integration and small footprint. * **Piezoelectric Element:** The core is a ceramic material that oscillates at a fixed frequency when an electric field is applied. * **Built-in Capacitors:** Unlike standard crystals that require external load capacitors, this part has them built-in. This reduces the Component Count on the PCB and saves space. * **Three-terminal Design:** 1. **Input:** Connected to the microcontroller's XTAL_IN. 2. **Ground:** Connected to the circuit ground. 3. **Output:** Connected to the microcontroller's XTAL_OUT. --- ### 3. Comparison: Ceramic Resonator vs. Quartz Crystal While both provide timing, they differ in precision and cost. | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Moderate (±0.5%) | High (ppm level) | | **Start-up Time** | Very Fast | Slower | | **Cost** | Low | Higher | | **Size** | Small (Integrated Caps) | Larger (Requires external Caps) | | **Typical Use** | General Microcontrollers | High-speed Communication (USB/Ethernet) | --- ### 4. Application Circuit Example In a typical application, the resonator is connected directly to the OSC pins of an MCU. Because the capacitors are internal, no external passives are required for the oscillator loop. ```c // Example representation of MCU connection [MCU_XTAL1] <----[Terminal 1: Input] [GND] <----[Terminal 2: Ground] [MCU_XTAL2] <----[Terminal 3: Output] ``` ---