The **MHO+27FCD-R** is a specific part number typically associated with **MHO+ (MtronPTI)** high-reliability crystal oscillators or clock modules. These components are critical in telecommunications, aerospace, and defense applications where frequency stability is paramount. --- ## 1. Component Overview The MHO series generally refers to **Metal-Hybrid Oscillators**. These are high-precision timing devices that provide a stable clock signal for digital circuits. ### Key Specifications | Feature | Typical Description | | :--- | :--- | | **Package Type** | 14-pin or 4-pin DIP (Dual In-line Package) | | **Technology** | HCMOS/TTL Compatible | | **Stability** | Generally ±25ppm to ±100ppm depending on suffix | | **Voltage** | Usually 5.0V or 3.3V (indicated by the FCD code) | | **Output Type** | Rectangular Square Wave | --- ## 2. Part Number Breakdown (Logic) While specific internal coding can vary by manufacturer revisions, the string `MHO+27FCD-R` breaks down as follows: 1. **MHO+**: The series prefix, indicating a high-reliability metal package oscillator. 2. **27**: Usually represents the **Frequency**. In this case, it often denotes **27.000 MHz**. 3. **FCD**: This is a performance and package code. * **F**: Often denotes the frequency stability or temperature range (e.g., -40°C to +85°C). * **C**: Often indicates the supply voltage (e.g., 5.0V). * **D**: Often refers to the "Duty Cycle" (symmetry) of the clock signal (e.g., 40/60% or 45/55%). 4. **-R**: Typically signifies **RoHS Compliance** (Lead-free). --- ## 3. Physical & Electrical Characteristics These parts are designed to operate under rigorous conditions. ### Electrical Interface ```cpp // Typical Pin Configuration (14-pin DIP style) Pin 1: NC (No Connection) or Tri-state Control Pin 7: Case Ground Pin 8: Output Signal (27.000 MHz) Pin 14: Vcc (+5V or +3.3V) ``` ### Key Advantages * **Hermetic Sealing**: The metal "can" is resistance-welded to protect the quartz crystal from moisture and atmospheric contaminants. * **Low Jitter**: Provides a clean signal with minimal timing variations, essential for high-speed data transmission. * **Robustness**: Highly resistant to mechanical shock and vibration compared to standard consumer-grade oscillators. --- ## 4. Common Applications * **Networking**: Routers, switches, and base stations. * **Industrial**: PLC (Programmable Logic Controllers) and automation hardware. * **Legacy Systems**: Often found as replacement parts for older high-end computing or radio equipment.