The **MHO+31TCD-R** is a specific model of a **High-Frequency Crystal Oscillator**, typically manufactured by companies like **Mercury Electronic**. These components are critical for providing stable clock signals in digital circuits. --- ## 1. Technical Specifications Below are the primary electronic characteristics typical of the MHO+ series: | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Package Type** | 14-Pin DIP (Full Size) / 4-Pin Active | | **Output Type** | CMOS / TTL | | **Supply Voltage (Vcc)** | +3.3V or +5.0V DC | | **Frequency Range** | 1.0 MHz to 150 MHz (Model dependent) | | **Operating Temperature** | -10°C to +70°C (Standard) | | **Frequency Stability** | ±25ppm to ±100ppm | --- ## 2. Key Features and Construction The "MHO" series is characterized by its robust design and reliability in industrial environments. * **Crystal Unit:** Contains a high-precision quartz crystal blank. * **Integrated Circuit (IC):** Includes an oscillation circuit and an output buffer to ensure the signal can drive multiple logic gates. * **Metal Can Packaging:** The "R" suffix often denotes **RoHS Compliance**. The metal casing provides EMI (Electromagnetic Interference) shielding, protecting the internal signal from external noise. * **Tri-state Function:** Many models in this series include an "Enable/Disable" function on Pin 1, allowing the output to go into a high-impedance state to save power. --- ## 3. Pin Configuration (14-Pin DIP Style) Although it has a 14-pin footprint, usually only 4 pins are electrically active: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC or E/D | No Connection or Tri-state Control | | **7** | GND | Ground Connection | | **8** | Output | The generated clock signal (Square Wave) | | **14** | Vcc | Power Supply (+) | --- ## 4. Common Applications The MHO+31TCD-R is widely used in systems requiring a steady "heartbeat" for data processing: 1. **Microprocessors:** Providing the base clock for CPUs. 2. **Networking:** Timing for Ethernet controllers and routers. 3. **Industrial Control:** Synchronizing PLC (Programmable Logic Controller) operations. 4. **Embedded Systems:** General-purpose timing for PCB designs.