The **CSTCC3M07G56-R0** belongs to the Murata CERALOCK® family. It is a surface-mount (SMD) ceramic resonator with built-in load capacitors. These components are primarily used as frequency sources for microprocessors and microcontrollers where extreme precision (like that of a quartz crystal) is not required, but cost and space are critical. --- ### 1. Component Specifications Below are the primary technical parameters for the CSTCC series resonator at the specified frequency: | Parameter | Specification | | :--- | :--- | | **Part Number** | CSTCC3M07G56-R0 | | **Frequency** | 3.07 MHz | | **Frequency Tolerance** | ±0.5% | | **Resonant Impedance** | 50 $\Omega$ (Max) | | **Built-in Capacitance** | 47 pF (Typical) | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 7.2 x 3.0 mm (approx.) | --- ### 2. Key Features and Design The "CSTCC" series is distinct due to its integrated design: * **Built-in Load Capacitors:** Unlike standard crystals that require two external capacitors to oscillate, this part has them built-in. This reduces the component count from three to one. * **Three-Terminal Design:** * **Pin 1:** Input (Connected to MCU XTAL1) * **Pin 2:** Ground (Connected to VSS) * **Pin 3:** Output (Connected to MCU XTAL2) * **Mechanical Strength:** Ceramic resonators are generally more resistant to physical shock and vibration compared to glass-sealed quartz crystals. --- ### 3. Application Use Cases This specific 3.07 MHz frequency is often utilized in: * **Low-Speed Microcontrollers:** Clocking for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote controls, white goods (washers/dryers), and toys. * **Communication Interfaces:** Older UART or specific baud rate generation requirements. --- ### 4. Comparison: Resonator vs. Crystal | Feature | Ceramic Resonator (CSTCC) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Lower (±0.5%) | Higher (±0.001%) | | **Cost** | Low | Higher | | **Startup Time** | Very Fast | Slower | | **Size** | Small (Integrated Caps) | Larger (External Caps needed) | --- ### 5. Part Number Breakdown (Typical Murata Coding) * **CSTCC:** Product series (SMD Ceramic Resonator with built-in caps). * **3M07:** Nominal frequency (3.07 MHz). * **G:** Frequency tolerance (±0.5%). * **56:** Code for specific internal capacitance/characteristics. * **R0:** Packaging code (usually refers to Tape & Reel).