## CSTCG22M5V51-R0: Component Overview The **CSTCG22M5V51-R0** is a high-frequency **Ceramic Resonator** manufactured by **Murata Electronics**. It belongs to the CERALOCK® family and is commonly used as a clock source for microcontrollers and other digital circuits. --- ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 22.500 MHz | | **Frequency Tolerance** | ±0.5% | | **Operating Temperature** | -20°C to +80°C | | **Built-in Load Capacitance** | 5 pF | | **Frequency Aging** | ±0.3% (over 10 years) | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 2.5 x 2.0 mm | --- ### 2. Key Features and Components * **Built-in Load Capacitors:** This part includes internal load capacitors (5pF). This eliminates the need for two external capacitors, saving PCB space and reducing the Bill of Materials (BOM) cost. * **CERALOCK® Technology:** Murata’s proprietary ceramic technology allows for a high mechanical Q factor and excellent stability compared to standard LC circuits. * **Small Form Factor:** The "CG" series uses a very small footprint (2520 metric), making it ideal for compact consumer electronics. * **Reflow Soldering:** Designed to withstand standard lead-free reflow soldering profiles. --- ### 3. Pin Configuration (3-Terminal) Unlike a 2-pin crystal, this ceramic resonator has three pins: 1. **Input:** Connected to the oscillator input of the IC. 2. **Ground:** The center pin is connected to the circuit ground (required for the internal capacitors). 3. **Output:** Connected to the oscillator output of the IC. --- ### 4. Comparison: Ceramic Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (CSTCG) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | | **Start-up Time** | Very Fast | Slower | | **Cost** | Low | Higher | | **Size** | Small (Built-in caps) | Larger (External caps needed) | | **Applications** | USB, Microcontrollers, Toys | High-speed Comm, Precise Clocks | --- ### 5. Application Circuit ```c // Schematic Representation [ MCU_OSC_IN ] <----Pin 1---- [ Resonator ] ----Pin 3----> [ MCU_OSC_OUT ] | Pin 2 | [ GND ] ``` ---