The **MHO+26FBD-R** is a specific part number typically associated with **Quartz Crystal Oscillators**, often manufactured by companies like **Mercury Electronic**. These components are critical for providing a stable clock signal in digital circuits. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | Active oscillator with internal circuitry. | | **Package Type** | DIP-14 (Full Size) | Metal can package with 4 active pins. | | **Frequency** | 26.000 MHz | The standard operating frequency. | | **Output Logic** | HCMOS/TTL | Compatible with standard digital logic levels. | | **Supply Voltage** | 5.0V (Typical) | Standard operating voltage for "MHO" series. | | **Stability** | ±25ppm to ±100ppm | Varies by sub-model, defining frequency drift. | | **RoHS Status** | -R (Compliant) | Lead-free and environmentally compliant. | --- ### 2. Internal Components & Construction Unlike a simple 2-pin crystal, the MHO+26FBD-R is an **active device**. It contains: 1. **Quartz Blank:** A precision-cut piece of quartz that vibrates at 26MHz. 2. **Oscillator IC:** An integrated circuit that drives the quartz and squares the output waveform. 3. **Bypass Capacitor:** Internal capacitance to reduce power supply noise. 4. **Metal Housing:** Provides EMI (Electromagnetic Interference) shielding to prevent the clock signal from interfering with other components. --- ### 3. Pin Configuration (DIP-14 Style) Although the package is the size of a 14-pin Integrated Circuit, only 4 pins are physically present or connected: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC or Tri-state | No connection or Output Enable/Disable. | | **7** | GND | Circuit Ground. | | **8** | Output | The 26MHz square wave signal. | | **14** | Vcc | +5V Power Supply. | --- ### 4. Typical Applications This component is used in legacy and industrial systems requiring a high-voltage (5V) stable clock source: * **Microcontrollers:** Providing the external clock for 8-bit or 16-bit MCUs. * **Networking Gear:** Timing for Ethernet or serial communication controllers. * **Industrial Automation:** PLCs and control boards that require robust through-hole components. * **Radio Equipment:** Used as a reference frequency for synthesizers. ---