The **MHO+66TFD-R** is a specific series of high-precision, military/industrial-grade crystal oscillators. These components are typically manufactured by companies like **MtronPTI**. They are designed for applications requiring high stability and reliability under varying environmental conditions. --- ### 1. Key Technical Specifications Below are the typical technical parameters for the MHO+ series oscillators: | Parameter | Typical Value / Range | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Package Type** | 14-pin DIP (Dual In-line Package) - Full Size | | **Output Type** | TTL / CMOS Compatible | | **Supply Voltage (Vcc)** | +5.0 VDC (Standard for this series) | | **Frequency Stability** | ±25ppm to ±100ppm (Depending on specific sub-code) | | **Operating Temperature** | -40°C to +85°C (Industrial) or -55°C to +125°C (Military) | | **Through-Hole/SMD** | Through-Hole (T) | --- ### 2. Part Number Breakdown While manufacturer codes vary slightly, the "MHO" prefix generally follows this logic: 1. **MHO**: Series designation (Metal Hermetic Oscillator). 2. **+**: Often indicates RoHS compliance (Lead-free). 3. **6**: Refers to the output type and supply voltage (e.g., 5V CMOS/TTL). 4. **6**: Stability code (e.g., ±50ppm). 5. **T**: Denotes the "Tristate" function, allowing the output to be placed in a high-impedance state. 6. **F**: Frequency or Temperature range identifier. 7. **D**: Package style (DIP). 8. **R**: RoHS Compliant. --- ### 3. Pin Configuration (14-Pin DIP) In a standard 14-pin DIP oscillator like the MHO+66TFD, only four pins are usually active: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | N/C or Tri-state | Leave open or connect to Vcc for normal operation. | | **7** | GND | Ground connection. | | **8** | Output | The generated clock signal. | | **14** | Vcc | +5V Power Supply. | --- ### 4. Application Areas Because of its robust metal hermetic packaging and high-frequency stability, this part is commonly found in: * **Telecommunications:** Base stations and switching equipment. * **Industrial Control:** High-reliability embedded systems. * **Military/Aerospace:** Equipment requiring resistance to moisture and shock. * **Legacy Computing:** Replacement parts for older industrial motherboards. ---