## CSTCE8M38G52A-R0: Component Overview The **CSTCE8M38G52A-R0** is a ceramic resonator manufactured by **Murata Electronics**. It belongs to the **CERALOCK®** family, which is widely used in microcontrollers and other digital circuits to provide a stable clock frequency. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 8.388 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.2% | | **Load Capacitance** | 10 pF (Built-in) | | **Operating Temperature** | -40°C to +125°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 3.2 x 1.3 mm | --- ### 2. Physical Structure and Pins The device is a three-terminal component. Unlike standard two-pin crystals, ceramic resonators in this series include **internal load capacitors**, which saves space and reduces component count on the PCB. * **Pin 1:** Input (Connected to MCU OSC_IN) * **Pin 2:** Ground (GND) * **Pin 3:** Output (Connected to MCU OSC_OUT) --- ### 3. Core Electronic Features #### A. Built-in Load Capacitance The "CSTCE" prefix indicates that this part includes integrated capacitors. This eliminates the need for two external capacitors, simplifying the circuit design and reducing the parasitic effects of PCB traces. #### B. Piezoelectric Effect It operates based on the mechanical resonance of a piezoelectric ceramic material (usually Lead Zirconate Titanate). When an electrical signal is applied, the material vibrates at its resonant frequency, creating a highly stable clock signal. #### C. Stability and Precision While more stable than a simple RC (Resistor-Capacitor) oscillator, ceramic resonators are **less precise** than quartz crystals. * **Crystal:** ~10 to 100 ppm (parts per million). * **Ceramic Resonator:** ~0.5% (approx. 5000 ppm). --- ### 4. Comparison Table: Resonator vs. Crystal | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | | :--- | :--- | :--- | | **Cost** | Lower | Higher | | **Startup Time** | Very Fast | Slower | | **Accuracy** | Moderate | High | | **Size** | Very Small (Built-in Caps) | Larger (Requires External Caps) | --- ### 5. Application Circuit ```arduino [ Microcontroller ] / \ OSC_IN OSC_OUT | | +----[ Resonator ]---+ | GND ``` *Note: In this specific model, the center pin must be connected to Ground to utilize the internal 10pF capacitors.*