The **CSTCG28M0V51-R0** is a miniature, surface-mount ceramic resonator developed by Murata Electronics. It is part of the CERALOCK® line, which is commonly used as a frequency control component in microcontrollers and timing circuits. --- ## 1. Technical Specifications The following table highlights the core electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Oscillation Frequency** | 28.000 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% (Temperature dependent) | | **Resonant Impedance** | 50 $\Omega$ (max) | | **Load Capacitance** | 5 pF (Internal) | | **Operating Temperature** | -20°C to +80°C | | **Package Type** | SMD (Small size, approx. 2.0 x 1.3 mm) | --- ## 2. Key Features * **Built-in Capacitance:** Unlike standard quartz crystals that require external load capacitors, this "CERALOCK" device features built-in capacitors. This saves PCB space and simplifies the circuit design. * **Miniaturization:** The "CG" series uses high-density mounting technology, making it ideal for ultra-compact electronic devices. * **High Reliability:** Ceramic resonators are generally more robust against mechanical shock and vibration compared to traditional glass-sealed crystals. * **Cost-Effective:** While slightly less accurate than quartz crystals, ceramic resonators are significantly cheaper and offer faster "start-up" times for the oscillator circuit. --- ## 3. Pinout and Circuit Integration The device typically features **3 terminals**: 1. **Input (1):** Connected to the XTAL_IN of the MCU. 2. **GND (2):** The center pin must be connected to the system ground to utilize the internal capacitors. 3. **Output (3):** Connected to the XTAL_OUT of the MCU. ### Basic Application Diagram ```text Microcontroller +---------------+ | | | [OSC_IN] [OSC_OUT] +-------+-------+ | | +-------+-------+-------+ | (1) (2) (3) | | [ IN ] [ GND ] [ OUT ]| | CSTCG... | +----------+------------+ | [GND] ``` --- ## 4. Common Applications Due to its 28MHz frequency and small footprint, the CSTCG28M0V51-R0 is frequently found in: * **USB Peripherals:** High-speed data transfer timing. * **Small Wearables:** Fitness trackers and smartwatches. * **Consumer Electronics:** Remote controls, camcorders, and portable audio players. * **Automotive Infotainment:** Non-safety critical clocking for displays or audio units.