The **CSTCC3M07G56-R0** is a specific surface-mount ceramic resonator produced by **Murata Electronics**. It belongs to the CERALOCK® family, designed to provide a stable clock signal for microprocessors and other integrated circuits. --- ### 1. General Specifications The table below highlights the core electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Resonant Frequency** | 3.072 MHz | | **Frequency Tolerance** | ±0.5% | | **Built-in Load Capacitance** | 47 pF (Internal) | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package / Case** | 7.2mm x 3.0mm (Lead-free) | --- ### 2. Key Features & Internal Structure The "G56" designation in the part number indicates specific internal configurations, most notably the built-in capacitors. * **Internal Load Capacitors:** Unlike standard crystals that require external capacitors ($C_1$ and $C_2$) to complete the oscillation circuit, this part integrates them internally. This saves PCB space and reduces component count. * **Ceramic Material:** It utilizes the mechanical resonance of piezoelectric ceramics. While less precise than quartz crystals, ceramic resonators are more robust against mechanical shock and are significantly cheaper. * **Start-up Time:** Ceramic resonators generally have a faster oscillation start-up time compared to quartz crystals, which is beneficial for power-saving modes in microcontrollers. --- ### 3. Pin Configuration and Circuitry The device typically features 3 terminals: 1. **Input:** Connected to the XTAL/OSC input of the MCU. 2. **Ground:** The center pin is connected to the system ground (GND) to facilitate the internal load capacitors. 3. **Output:** Connected to the XTAL/OSC output of the MCU. #### Typical Application Schematic ```text [ Microcontroller ] / \ OSC1 OSC2 | | | CSTCC Resonator | +-------[ Terminal 1] | | | | [Terminal 2]---(GND) | | +-------[ Terminal 3]--+ ``` --- ### 4. Comparison: Resonator vs. Crystal | Feature | Ceramic Resonator (CSTCC) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | | **Cost** | Low | Higher | | **Size** | Small (Integrated Caps) | Larger (Requires external Caps) | | **Durability** | High vibration resistance | Sensitive to shock |