The **CSTCC3M00G56A-R0** is a specific surface-mount ceramic resonator manufactured by **Murata Electronics**. It belongs to the CERALOCK® family, which is widely used as a cost-effective alternative to quartz crystals for clock generation in microcontrollers. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Nominal Frequency** | 3.00 MHz | | **Frequency Tolerance** | ±0.5% | | **Resonant Impedance** | 50 Ω (Max) | | **Built-in Capacitance** | 47 pF (Internal Load Capacitors) | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 7.2 x 3.0 mm | --- ### 2. Physical Structure and Pinout The "CSTCC" series is characterized by its **3-terminal** design. Unlike traditional 2-pin crystals that require external load capacitors, this component integrates the capacitors internally. 1. **Input (Terminal 1):** Connected to the OSC_IN of the MCU. 2. **Ground (Terminal 2):** The center pin must be connected to the system ground. 3. **Output (Terminal 3):** Connected to the OSC_OUT of the MCU. --- ### 3. Features and Advantages * **Built-in Capacitance:** Eliminates the need for two external capacitors, saving PCB space and reducing the Bill of Materials (BOM) cost. * **Stability:** Offers better stability than RC (Resistor-Capacitor) oscillators, though it is less precise than a quartz crystal. * **Durability:** High mechanical vibration and shock resistance. * **Small Footprint:** The low-profile SMD package is ideal for high-density circuit boards. --- ### 4. Typical Applications This part is commonly found in consumer electronics where extreme precision (like timing a watch) isn't required, but stable clocking is necessary: * **Microcontroller Clocks:** General purpose 8-bit or 16-bit MCUs. * **Home Appliances:** Control boards for washing machines or microwaves. * **Remote Controls:** Infrared or RF signaling. * **Automotive Electronics:** Non-safety critical systems (e.g., car audio). --- ### 5. Part Number Breakdown The nomenclature reveals specific details about the component: ```text CSTCC 3M00 G 5 6 A - R0 | | | | | | | | | | | | | +-- Packaging (Plastic Taping) | | | | | +------ Individual Specification | | | | +-------- Load Capacitance (47pF) | | | +---------- Frequency Tolerance (±0.5%) | | +------------ Frequency Grade (G = Standard) | +---------------- Frequency (3.00 MHz) +---------------------- Series (SMD with built-in caps) ```