The **MHO+31TAG-R** belongs to a specific category of high-precision crystal oscillators, typically manufactured by companies like **Mercury Electronic**. These components are critical for providing a stable clock signal in digital circuits. --- ### 1. Component Specification Overview The part number follows a specific nomenclature that defines its electronic characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | An active component that generates a square wave. | | **Package Style** | MHO (Half-size DIP) | A 4-pin metal can package, through-hole mount. | | **Output Type** | CMOS / TTL | Compatible with standard logic level inputs. | | **Supply Voltage** | 3.3V or 5.0V | Standard operating voltage for digital electronics. | | **RoHS Status** | -R (Compliant) | Lead-free and environmentally compliant. | ### 2. Internal Electronic Structure Unlike a passive crystal (which has two pins and requires an external oscillating circuit), the **MHO+31TAG-R** is an **active oscillator**. It contains: * **AT-Cut Quartz Crystal:** The core vibrating element that determines the frequency. * **Oscillation IC:** An internal integrated circuit that drives the crystal and maintains the frequency. * **Buffer Circuitry:** Ensures the output signal is strong enough to drive multiple gates without frequency "pulling." * **Bypass Capacitor (Recommended):** While not inside the metal can, these parts usually require a 0.01µF capacitor externally between Vcc and Ground. ### 3. Pin Configuration (DIP-4) These oscillators typically use a standard 4-pin layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | NC or Tri-state | No connection or "Output Enable" control. | | **Pin 4** | GND | Circuit Ground. | | **Pin 5** | Output | The generated clock signal (Square Wave). | | **Pin 8** | Vcc | Positive Power Supply. | ### 4. Key Performance Parameters * **Frequency Stability:** Usually measured in PPM (parts per million). This part typically offers ±25ppm to ±100ppm stability. * **Operating Temperature:** Generally rated for -10°C to +70°C (Standard) or -40°C to +85°C (Industrial). * **Rise/Fall Time:** Very fast switching (nanoseconds) to ensure clean digital transitions. --- ### 5. Common Applications Due to its high stability and metal shielding (which reduces Electromagnetic Interference), it is used in: 1. **Microcontrollers:** Providing the master clock for CPUs. 2. **Networking:** Ethernet controllers and routers. 3. **Industrial Control:** PLCs and automation timing. 4. **Legacy Hardware:** Repairs for older computing equipment using through-hole DIP components.