The **CSTCE8M38G55-R0** is a ceramic resonator manufactured by **Murata Electronics**. It belongs to the CERALOCK® family and is widely used for clock generation in microcontrollers and other digital circuits due to its small size and built-in load capacitance. --- ### 1. Technical Specifications The following table highlights the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 8.388 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% | | **Built-in Load Capacitance** | 33 pF | | **Resonant Impedance** | 40 Ω (max) | | **Operating Temperature** | -20°C to +80°C | | **Package / Case** | SMD (1206 size equivalent / 3.2 x 1.3 mm) | | **Mounting Type** | Surface Mount | --- ### 2. Key Features * **Built-in Capacitors:** Unlike traditional quartz crystals that require external load capacitors, this part includes internal capacitors. This reduces the component count on the PCB and saves space. * **High Stability:** It offers better stability than a standard RC oscillation circuit, making it suitable for timing-critical applications. * **Small Footprint:** Its miniature size allows for high-density mounting in compact consumer electronics. * **Cost-Effective:** Ceramic resonators are generally less expensive than quartz crystals. --- ### 3. Pin Configuration and Circuitry The CSTCE series typically features a **3-terminal** layout: 1. **Input (Oscillator 1):** Connected to the MCU's XTAL input. 2. **Ground:** The center pin is connected to the system ground (GND) for the built-in capacitors. 3. **Output (Oscillator 2):** Connected to the MCU's XTAL output. #### Typical Application Schematic ```text MCU / IC +-----------+ | | | OSC_IN |----[ Pin 1: Input ] | | | | GND |----[ Pin 2: Ground ] <-- Resonator | | | | OSC_OUT |----[ Pin 3: Output ] | | +-----------+ ``` --- ### 4. Common Applications * **Microcontrollers:** Serving as the main clock source for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Used in remote controls, home appliances, and toys. * **Peripherals:** PC peripherals, keyboards, and simple USB devices.