The **MHO+42FDD-R** is a specific part number typically associated with **MHO+ series High-Precision Crystal Oscillators** manufactured by companies like MtronPTI. These components are critical for providing accurate timing and frequency references in electronic circuits. ### 1. Component Overview The "MHO+" series generally refers to a High-Speed CMOS (HCMOS) or TTL compatible crystal oscillator housed in a rugged, hermetically sealed 14-pin DIP (Dual In-line Package) metal case. --- ### 2. Technical Specifications Based on the standard nomenclature for this series, here is the breakdown of the technical characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Type** | Crystal Oscillator (XO) | Fixed frequency timing source. | | **Output Type** | HCMOS / TTL | Compatible with standard digital logic levels. | | **Package** | 14-pin DIP | Metal "Full-Size" can for through-hole mounting. | | **Frequency Range** | 1.0 MHz to 100+ MHz | (Check specific marking for the exact MHz). | | **Supply Voltage** | 5.0V or 3.3V | Typically operates at a standard 5V logic level. | | **Stability** | ±25ppm to ±100ppm | High precision over a specific temperature range. | | **Termination** | -R (RoHS) | Indicates the part is lead-free/RoHS compliant. | --- ### 3. Pin Configuration The 14-pin DIP package actually only uses four physical pins in most configurations (pins 1, 7, 8, and 14): | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC / Tri-state | No Connection or Output Enable/Disable. | | **7** | GND | Circuit and Case Ground. | | **8** | Output | The generated frequency signal. | | **14** | Vcc | Supply Voltage (Positive). | --- ### 4. Key Applications Because of its metal shielding and stable output, this component is commonly found in: * **Legacy Computing:** Motherboards and peripheral controllers. * **Industrial Equipment:** PLCs and automation control boards. * **Test & Measurement:** Oscilloscopes and signal generators. * **Networking:** Synchronizing data transmission in routers or switches. --- ### 5. Part Number Decoding (Example) * **MHO:** Series Name (Mtron High Output / High Speed). * **+:** Usually denotes a specific enhancement or RoHS compliance upgrade. * **4:** Voltage/Stability code (often 5V, ±50ppm). * **2:** Operating Temperature range (often -40°C to +85°C). * **FDD:** Specific internal revision or frequency configuration code. * **-R:** RoHS Compliant.