The **MHO+27FBD-R** is a specific part number typically associated with **MHO (Metal House) series Crystal Oscillators** manufactured by companies like **Mercury Electronic**. These components are essential for providing a stable clock signal in digital circuits. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | An active device providing a fixed frequency. | | **Package Type** | DIP-14 (Full Size) | Metal can package with 4 active pins. | | **Supply Voltage** | 5.0V DC | Standard operating voltage for TTL/CMOS logic. | | **Output Logic** | CMOS / TTL | Compatible with standard microprocessors. | | **Frequency Stability** | ±25ppm to ±100ppm | Varies based on specific sub-ordering codes. | | **Operating Temp** | -10°C to +70°C | Commercial grade temperature range. | --- ### 2. Pin Configuration (DIP-14 Package) Even though the package has the footprint of a 14-pin DIP, only four pins are typically functional: * **Pin 1:** NC (No Connection) or Tri-state Enable/Disable. * **Pin 7:** GND (Case Ground). * **Pin 8:** Output (The actual clock signal). * **Pin 14:** Vcc (+5V Power Supply). --- ### 3. Key Electronic Features * **Metal Housing:** The "MHO" prefix indicates a metal house, which provides excellent Electro-Magnetic Interference (EMI) shielding. * **Through-Hole Design:** The "BD" suffix often refers to the lead style, suitable for through-hole PCB mounting or socketing. * **Reliability:** These parts are known for high mechanical shock resistance and aging stability over time. --- ### 4. Common Applications These oscillators are found in legacy and industrial hardware where timing precision is required: 1. **Industrial Controllers:** PLC units and timing relays. 2. **Networking:** Older routers and switch synchronization. 3. **Embedded Systems:** Providing the heartbeat for 8-bit or 16-bit microcontrollers. ---