Based on your query, it appears you are referring to a specific type of **Crystal Oscillator** manufactured by **MtronPTI**. The **MHO+** series consists of high-reliability, metal-can packaged crystal oscillators designed for industrial and aerospace applications. ### 1. Part Number Breakdown The part number **MHO+75FCD-R** typically follows this structural convention: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **MHO+** | Product Series | High Reliability Crystal Oscillator (HC-14/U or HC-09/U metal can) | | **7** | Supply Voltage | Usually indicates **5.0V** operation | | **5** | Stability/Temp | Represents specific stability (e.g., ±50ppm or ±100ppm) | | **F** | Output Type | **TTL/CMOS** compatible output | | **C** | Operating Temp | Commercial range (usually 0°C to +70°C) | | **D** | Duty Cycle | Tight symmetry (usually 45/55%) | | **-R** | RoHS Compliance | Lead-free / RoHS compliant | --- ### 2. Key Technical Specifications While the exact frequency is usually printed on the component housing (e.g., 20.000 MHz), the series generally adheres to these electronic parameters: * **Package Style:** Through-hole 14-pin DIP (Full size) or 8-pin DIP (Half size). * **Input Voltage ($V_{cc}$):** 5.0 Volts DC ($\pm$10%). * **Output Waveform:** Square wave, CMOS/TTL compatible. * **Frequency Range:** Typically available from 1.0 MHz to 100+ MHz. * **Startup Time:** Maximum 10ms. * **Aging:** $\pm$5 ppm max per year. --- ### 3. Application Use Cases Because of the "MHO+" designation (known for high-reliability/hi-rel), these parts are frequently used in: 1. **Industrial Controls:** Systems requiring stable timing in harsh electrical environments. 2. **Legacy Computing:** Replacement parts for older motherboards or timing circuits. 3. **Communication Equipment:** Synchronizing data streams in networking hardware. --- ### 4. Schematic Representation In a standard circuit, the pins are typically assigned as follows: ```text Pin 1: NC (No Connection) or Tri-state Enable Pin 7: Case Ground Pin 8: Output (Frequency) Pin 14: +5V DC Supply ``` ---