The **25CTE-G-R** is a specific electronic component typically categorized as a **Surface Mount (SMD) Glass Sidewall Crystal Oscillator** or a high-precision resonator component, often manufactured by companies like *Kyocera* or *Citizen*. The part number follows a specific nomenclature that defines its physical and electrical characteristics. --- ## 1. Technical Specifications Below are the general specifications typically associated with this series: | Parameter | Specification | | :--- | :--- | | **Component Type** | Crystal Resonator / Oscillator | | **Package Type** | SMD (Surface Mount Device) | | **Package Size** | 2.5mm x 2.0mm (Standard) | | **Frequency Range** | Usually 12MHz to 54MHz (Application dependent) | | **Tolerance** | ±10ppm to ±30ppm | | **Operating Temp** | -40°C to +85°C | | **RoHS Status** | Compliant (Lead-Free) | --- ## 2. Part Number Breakdown While manufacturers have slight variations, the "25CTE-G-R" suffix generally breaks down as follows: 1. **25**: Refers to the physical dimensions (2.5mm length). 2. **CTE**: Product series designation (Glass-sealed or Ceramic-based). 3. **G**: Often denotes the frequency stability or specific load capacitance. 4. **R**: Indicates the packaging method, specifically **Tape & Reel** for automated assembly. --- ## 3. Key Features and Applications ### Features * **Hermetic Sealing:** Uses glass-sealing technology to ensure long-term stability and protection against environmental moisture. * **Miniaturization:** Its small footprint (2520 metric) makes it ideal for dense PCB layouts. * **High Precision:** Low frequency aging and high thermal stability. ### Common Applications * **Consumer Electronics:** Smartphones, tablets, and wearables. * **Wireless Communication:** Bluetooth modules, Wi-Fi chipsets, and Zigbee. * **Industrial:** IoT sensors and embedded microcontrollers requiring an external clock source. --- ## 4. Layout and Handling When designing a PCB for the **25CTE-G-R**, consider the following: * **Keep Traces Short:** Minimize the distance between the crystal and the IC pins to reduce parasitic capacitance. * **Ground Plane:** Place a solid ground plane underneath the component to minimize EMI (Electromagnetic Interference). * **Soldering:** Ensure the reflow profile matches the RoHS requirements for glass-sealed components to avoid thermal shock.