The **MHO+44TFG-R** is a specific part number belonging to a series of high-precision **Crystal Oscillators** (specifically categorized under Clock Oscillators or Crystal Units), typically manufactured by companies like **Mercury Electronic**. Below is a detailed breakdown of the electronic specifications and characteristics associated with this part. ### 1. General Specifications The part number follows a specific nomenclature that defines its electrical and physical properties: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | A complete integrated circuit that generates a clock signal. | | **Package Style** | 14-Pin DIP (Full Size) | Metal thru-hole package with a rectangular shape. | | **Output Type** | TTL / HCMOS | Compatible with standard digital logic levels. | | **Lead Finish** | RoHS Compliant (R) | The "-R" suffix indicates Lead-Free/RoHS compliance. | --- ### 2. Pinout Configuration For the standard 14-pin DIP package used by the MHO series, only four pins are typically functional: | Pin Number | Designation | Function | | :--- | :--- | :--- | | **Pin 1** | NC / OE | No Connection or Output Enable/Disable control. | | **Pin 7** | GND | Circuit Ground (Case is usually grounded). | | **Pin 8** | OUTPUT | The generated frequency (Square Wave). | | **Pin 14** | Vcc | Positive Power Supply (Commonly +5.0V or +3.3V). | --- ### 3. Key Electronic Features * **Frequency Stability:** These units are designed for high stability, typically ranging from $\pm 25\text{ppm}$ to $\pm 100\text{ppm}$ depending on the specific sub-grade. * **Operating Voltage:** Most MHO series parts operate at **5.0V DC**, though variants exist for lower voltages. * **Waveform:** It produces a square wave output suitable for driving microprocessors, FPGAs, and other digital logic circuits. * **Hermetic Sealing:** The metal "Full Size" can is resistance-welded to provide a hermetic seal, protecting the quartz crystal from humidity and contaminants. ### 4. Part Number Decoding (Typical) While exact definitions can vary by manufacturer, the "MHO+44TFG-R" string usually breaks down as: 1. **MHO:** Series designation (Metal Hermetic Oscillator). 2. **+:** Often indicates a specific voltage or lead-free process. 3. **44:** Often refers to a frequency stability code (e.g., $\pm 25\text{ppm}$). 4. **T:** Temperature range (e.g., $-40^\circ\text{C}$ to $+85^\circ\text{C}$). 5. **F:** Full size (14-pin DIP footprint). 6. **G:** Output logic (e.g., HCMOS/TTL). 7. **-R:** RoHS Compliant. --- ### 5. Common Applications * **Legacy Computing:** Providing master clock signals for older CPU architectures. * **Industrial Control:** Timing for PLC (Programmable Logic Controllers). * **Networking:** Synchronizing data transmission in telecommunications equipment. * **Test & Measurement:** Internal reference clocks for oscilloscopes or counters.