The **MH14FCG-R** is an electronic component primarily classified as a **Passive Crystal Oscillator**. It is commonly used in timing circuits to provide a stable frequency reference for microprocessors and digital systems. ### 1. General Specifications The MH14FCG-R belongs to the HC-49/S (low profile) series of quartz crystals. Below are the typical technical parameters: | Parameter | Specification | | :--- | :--- | | **Component Type** | Quartz Crystal (Passive) | | **Package Type** | HC-49/S (Through-Hole) | | **Frequency Range** | Typically fixed (often 14.31818 MHz or as specified by variant) | | **Frequency Tolerance** | ±20ppm to ±50ppm | | **Load Capacitance** | 12pF to 20pF (Standard) | | **Operating Temperature** | -20°C to +70°C (Standard Industrial) | | **Mounting Type** | Radial Through-Hole | --- ### 2. Physical Construction The part is housed in a metal "can" package, which provides electromagnetic shielding and environmental protection for the quartz wafer inside. * **HC-49/S Profile:** This is a "short" version of the traditional tall HC-49/U crystal, making it ideal for boards with height restrictions. * **Hermetic Seal:** The metal casing is resistance-welded to ensure the vacuum or inert gas atmosphere inside is maintained, preventing frequency drift due to oxidation. --- ### 3. Pinout and Circuit Integration As a passive crystal, the MH14FCG-R has two leads and requires external capacitors (Load Capacitors) to oscillate correctly. ```mermaid graph LR A[Pin 1] --- B(Quartz Crystal) B --- C[Pin 2] ``` **Standard Implementation:** To use this part in a circuit (e.g., with a microcontroller), you typically connect: 1. **Pin 1** to the `XTAL_IN` pin. 2. **Pin 2** to the `XTAL_OUT` pin. 3. Two ceramic capacitors (e.g., 22pF) from each pin to **Ground**. --- ### 4. Common Applications * **Motherboards:** Often used for generating clock signals for bus timings. * **Embedded Systems:** Providing a clock source for MCUs (Microcontrollers). * **Communication Devices:** Used in modems and routers for synchronization. * **Consumer Electronics:** Found in digital clocks, cameras, and gaming consoles.