The **CSTCE9M00G55Z-R0** is a ceramic resonator manufactured by Murata Electronics. It belongs to the **CERALOCK®** product line and is commonly used as a frequency control component in microcontrollers and timing circuits. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Nominal Frequency** | 9.000 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% | | **Operating Temperature** | -20°C to +80°C | | **Built-in Capacitance** | 33 pF (Integrated load capacitors) | | **Package Size** | 3.2 x 1.3 mm (SMD Type) | | **Mounting Type** | Surface Mount | --- ### 2. Functional Description Unlike standard crystals, this ceramic resonator includes **built-in load capacitors**. This simplifies the circuit design by removing the need for external capacitors, which saves board space and reduces the Bill of Materials (BOM) cost. #### Internal Components: * **Piezoelectric Element:** Vibrates at a specific frequency (9MHz) when an electric field is applied. * **Internal Capacitors:** Two capacitors connected from the input/output pins to the ground pin. --- ### 3. Part Number Breakdown The part number follows Murata's specific nomenclature: * **CSTCE**: Series code for SMD type ceramic resonators (Small size). * **9M00**: Frequency (9.00 MHz). * **G**: Frequency tolerance (±0.5%). * **55**: Specific design/tuning code (includes load capacitance specifications). * **Z**: Packaging variation. * **-R0**: Taping and Reel packaging (Plastic tape). --- ### 4. Common Applications * **Microcontrollers (MCUs):** Providing the clock source for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote controls, toys, and small home appliances. * **Peripherals:** USB controllers and communication interfaces where ultra-high precision (like that of a quartz crystal) is not strictly required. --- ### 5. Pros and Cons vs. Quartz Crystals | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | |:---|:---|:---| | **Cost** | Lower | Higher | | **Size** | Very Small (Built-in Caps) | Larger (Requires external caps) | | **Start-up Time** | Very Fast | Slower | | **Precision** | Moderate (±0.5%) | High (±0.001%) |