The **CSTCW24M5X53R-R0** is a specific electronic component manufactured by **Murata Electronics**. It belongs to the **CERALOCK®** family, which are ceramic resonators used to provide a stable clock signal for microcontrollers and other digital circuits. --- ## 1. Core Technical Specifications The part number encodes specific technical attributes. Here is a breakdown of its primary characteristics: | Parameter | Specification | | :--- | :--- | | **Component Type** | Ceramic Resonator | | **Oscillation Frequency** | 24.500 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% | | **Load Capacitance** | Built-in (typically 5pF - 15pF range) | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 2.5mm x 2.0mm (W x L) | | **Operating Temperature** | -20°C to +80°C | --- ## 2. Key Internal Features ### A. Built-in Load Capacitors Unlike traditional quartz crystals that require two external capacitors to complete the oscillation circuit, the **CSTCW** series features **integrated load capacitors**. * **Benefit:** Saves PCB space and reduces the Bill of Materials (BOM) count. * **Circuitry:** It is a 3-terminal device (Input, Ground, Output). ### B. Ceramic Technology It utilizes the mechanical resonance of piezoelectric ceramics. While less precise than quartz crystals (which have tolerances in the ppm range), ceramic resonators are: 1. **More Durable:** Higher resistance to mechanical shock and vibration. 2. **Faster Startup:** They reach stable oscillation faster than quartz. 3. **Cost-Effective:** Significantly cheaper for mass-market consumer electronics. --- ## 3. Pinout Configuration The device typically follows a standard 3-pad SMD layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | Input | Connected to the MCU Oscillator Input (OSC_IN) | | **2** | Ground | Connected to the system ground (GND) | | **3** | Output | Connected to the MCU Oscillator Output (OSC_OUT) | --- ## 4. Common Applications Due to its 24.5 MHz frequency and small form factor, this part is commonly found in: * **USB Controllers:** Often used for timing in USB 2.0 peripherals. * **Microcontrollers:** Serving as the main system clock for 8-bit or 32-bit MCUs. * **Consumer Electronics:** Remote weights, small appliances, and toy controllers. ---