## Technical Overview: CSTCE8M19G55-R0 The **CSTCE8M19G55-R0** is a specific model of a **Ceramic Resonator** manufactured by **Murata Manufacturing Co., Ltd.** It belongs to the CERALOCK® family, which are components used to generate stable oscillations for clock signals in microprocessors and other digital circuits. --- ### 1. Key Specifications This component is characterized by its small surface-mount design and built-in load capacitors. | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 8.192 MHz | | **Frequency Tolerance** | ±0.5% | | **Resonance Resistance** | 40 Ω (max) | | **Built-in Capacitance** | 33 pF (Typical) | | **Temperature Range** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 3.2 x 1.3 mm (CSTCE Series) | --- ### 2. Functional Components The "Electronic Parts" within this single package consist of three primary elements: 1. **Piezoelectric Ceramic Element:** The core of the device. It utilizes the mechanical vibration of a ceramic material (Lead Zirconate Titanate) to produce a precise electrical frequency. 2. **Built-in Load Capacitors:** Unlike standard crystals that require external capacitors ($C_1$ and $C_2$) to complete the oscillation circuit, this part has them integrated inside. This saves PCB space and reduces component count. 3. **Electrodes and Substrate:** Conductive layers that connect the ceramic element to the three external terminals (Input, Ground, Output). --- ### 3. Pin Configuration The device features a 3-terminal layout, which is standard for resonators with built-in capacitors. * **Terminal 1:** Input (Connected to the XTAL in of the MCU) * **Terminal 2:** Ground (Must be connected to the system GND) * **Terminal 3:** Output (Connected to the XTAL out of the MCU) --- ### 4. Comparison: Resonator vs. Quartz Crystal While both provide clock signals, the CSTCE8M19G55-R0 has distinct advantages and trade-offs: * **Pros:** * **Cost:** Significantly cheaper than quartz crystals. * **Size:** Smaller footprint due to integrated capacitors. * **Start-up Time:** Faster start-up than crystals. * **Cons:** * **Precision:** Lower frequency stability (±0.5%) compared to quartz (often ±0.001%). It is not suitable for high-precision timing like RTCs (Real-Time Clocks) or USB communication. --- ### 5. Common Applications * Microprocessor clock for household appliances (Washing machines, Microwaves). * Remote control units. * Automotive electronics (Non-safety critical systems like infotainment). * Toys and low-speed consumer electronics.