### Overview of CSTCE8M38G55A-R0 The **CSTCE8M38G55A-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 provide a stable clock signal for microprocessors and other digital circuits. --- ### Technical Specifications The following table outlines the primary electrical and physical characteristics of this part: | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 8.388 MHz | | **Frequency Tolerance** | ±0.50% | | **Operating Temperature** | -20°C to +80°C | | **Frequency Stability** | ±0.30% (over temperature range) | | **Load Capacitance** | 33 pF (Built-in) | | **Package Type** | SMD (Surface Mount Device) | | **Dimensions** | 3.2 x 1.3 mm | | **Mounting Type** | Tape and Reel (-R0 suffix) | --- ### Key Internal Components & Features 1. **Ceramic Element:** The core is a piezoelectric ceramic material that vibrates at a specific frequency when an oscillating voltage is applied. 2. **Built-in Capacitors:** The "CST" prefix indicates that this resonator includes **internal load capacitors**. This eliminates the need for two external capacitors on the PCB, saving space and reducing component count. 3. **CERALOCK® Technology:** Murata’s proprietary technology ensures high mechanical stability and resistance to vibration compared to standard quartz crystals. 4. **SMD Packaging:** The 3213 (metric) / 1205 (inch) package is extremely low-profile, making it ideal for compact consumer electronics. --- ### Typical Application Circuit In a standard microcontroller (MCU) setup, the resonator connects to the `OSC_IN` and `OSC_OUT` pins. Because the capacitors are built-in, the center pin is simply connected to Ground (GND). ```c // Conceptual Pinout Configuration [ MCU ] | Pin 1 (Input) ------> [ Resonator Terminal 1 ] | Pin 2 (Output) ------> [ Resonator Terminal 3 ] | GND ------> [ Resonator Terminal 2 (Center) ] ``` --- ### Comparison: Ceramic Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | | :--- | :--- | :--- | | **Cost** | Lower | Higher | | **Start-up Time** | Faster | Slower | | **Size** | Smaller (built-in caps) | Larger (requires external caps) | | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | **Summary:** The CSTCE8M38G55A-R0 is best suited for applications where cost and space are priorities and extreme timing precision (like a real-time clock) is not required.