The **MHO+14FCD-R** is a specific series of high-frequency, surface-mount (SMD) **Crystal Oscillators**. These components are critical in electronics for providing a stable clock signal to microprocessors, telecommunications equipment, and digital circuits. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | Active timing device using a quartz crystal. | | **Package Size** | 14 Pin Full Size (DIP/SMD) | Often refers to the standard metal "can" footprint. | | **Output Type** | CMOS / TTL | Compatible with standard logic levels. | | **Supply Voltage** | Usually 3.3V or 5.0V | Depends on the specific sub-series. | | **Frequency Range** | 1.0 MHz to 150+ MHz | Varies based on the specific numerical value (e.g., 14.318 MHz). | | **Stability** | ±25ppm to ±100ppm | Frequency variation over temperature. | --- ### 2. Internal Components An oscillator like the MHO series is an integrated module consisting of several internal parts: * **Quartz Crystal Blank:** The "heart" of the component that vibrates at a specific frequency via the piezoelectric effect. * **Oscillator IC:** An active circuit (amplifier/inverter) that maintains the oscillation of the crystal. * **Load Capacitors:** Internal capacitors tuned to ensure the crystal starts up and oscillates at the correct frequency. * **Metal Housing:** A hermetically sealed metal case designed to protect the crystal from moisture and provide EMI (Electromagnetic Interference) shielding. --- ### 3. Pin Configuration (Typical) Most MHO series oscillators utilize a 4-pin configuration within their physical footprint: 1. **Pin 1: Tri-state (Enable/Disable)** – High or Floating allows output; Low shuts down the output to save power. 2. **Pin 7 (or 2): Ground** – Connection to the negative supply. 3. **Pin 8 (or 3): Output** – The square wave clock signal. 4. **Pin 14 (or 4): Vcc** – The positive supply voltage. --- ### 4. Key Applications Because of the **"R" suffix** (which often denotes RoHS compliance or specific Ruggedized/Reflow parameters), these parts are found in: * **Networking Gear:** Routers, switches, and modems. * **Industrial Control:** PLCs and automation timing. * **Embedded Systems:** Providing the heartbeat for ARM or AVR microcontrollers. ---