The **MHO+38FBG-R** is a specific part number typically associated with **miniature quartz crystal oscillators**. These components are essential in electronics for providing a stable frequency reference or "heartbeat" for microprocessors and digital circuits. ### 1. Key Technical Specifications Based on the standard nomenclature for the MHO series, here are the primary technical characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | An active device that integrates a crystal and an oscillation circuit. | | **Package Style** | Half-Size DIP / Thru-Hole | A rectangular metal can package with 4 pins, smaller than full-size DIPs. | | **Frequency Stability** | ±25ppm to ±100ppm | Varies by specific sub-model, defining how much the frequency drifts. | | **Output Type** | HCMOS / TTL | Compatible with standard digital logic levels. | | **Operating Voltage** | 5.0V (Typical) | Most "MHO" series parts are designed for 5V systems. | | **RoHS Status** | Compliant (-R) | The "R" suffix typically denotes RoHS compliance (lead-free). | --- ### 2. Pin Configuration (Internal Mapping) Standard 4-pin miniature oscillators follow a specific layout to ensure they are inserted correctly into a PCB: | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | NC / OE | No Connection or Output Enable (Tristate function). | | **Pin 4** | GND | Circuit Ground (Case is usually grounded to reduce EMI). | | **Pin 5** | Output | The generated clock signal (Square wave). | | **Pin 8** | Vcc | Positive Power Supply (+5V). | --- ### 3. Part Number Breakdown While manufacturer codes vary slightly (often produced by companies like **MtronPTI**), the code usually breaks down as follows: 1. **MHO**: Series prefix for Miniature High-Frequency Oscillators. 2. **3**: Usually indicates the voltage or stability class (e.g., 5.0V). 3. **8**: Often refers to the symmetry/duty cycle (e.g., 40/60% or 45/55%). 4. **FBG**: Internal manufacturer codes for temperature range and frequency stability. 5. **-R**: RoHS Compliant. --- ### 4. Common Applications * **Legacy Computing:** Providing clock signals for older CPU architectures. * **Industrial Control:** Timing for PLC (Programmable Logic Controllers). * **Networking:** Synchronizing data transmission in older Ethernet or Serial hardware. * **Embedded Systems:** Main clock source for microcontrollers requiring high precision that internal RC oscillators cannot provide. ---