The **CSTCC3M07G56A-R0** is a specific surface-mount (SMD) 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. Technical Specifications The part number encodes specific characteristics of the device. Below are the primary technical parameters: | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 3.07 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% | | **Load Capacitance** | 47 pF (Built-in) | | **Mounting Type** | Surface Mount (SMD) | | **Package / Case** | 7234 (metric), 2.9mm x 1.3mm approx. | | **Operating Temperature** | -20°C to +80°C | --- ### 2. Key Features & Internal Components The "CSTCC" series is distinct due to its integration and material composition: * **Built-in Load Capacitors:** This part includes internal capacitors connected to the ground pin. This eliminates the need for two external capacitors on the PCB, saving space and reducing the Bill of Materials (BOM) cost. * **Ceramic Material:** Unlike quartz crystals, these use piezoelectric ceramics. While they have a wider frequency tolerance than quartz, they are more rugged and start up faster. * **Three-Terminal Design:** 1. **Input:** Connected to the MCU oscillator input. 2. **Ground:** Connected to the system ground (shared by internal caps). 3. **Output:** Connected to the MCU oscillator output. --- ### 3. Application Use Cases Because of its frequency (3.07 MHz) and stability profile, it is typically found in: * **Microprocessor Clocks:** Providing the heartbeat for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote controls, toys, and small appliances. * **Communication Equipment:** Low-speed data clocking where high precision (like USB or Ethernet) is not required. --- ### 4. Comparison: Ceramic Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (CSTCC) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | | **Cost** | Low | Higher | | **Startup Time** | Very Fast | Slow | | **Size** | Small (Built-in Caps) | Larger (Requires Ext. Caps) |