The **MHO+77FCG-R** is a specific part number typically associated with **MHO+ Series Crystal Oscillators** manufactured by companies like MtronPTI. These are high-performance frequency control components used in various electronic timing circuits. --- ## Technical Specifications Based on the standard nomenclature for this series, here are the electronic characteristics: | Parameter | Specification | Description | |:---|:---|:---| | **Component Type** | XO (Crystal Oscillator) | An active oscillator that provides a steady clock signal. | | **Package Style** | 14-pin DIP (Full Size) | A metal "can" package providing superior shielding. | | **Output Type** | HCMOS / TTL | Compatible with high-speed CMOS and standard TTL logic. | | **Operating Voltage** | 5.0V (Typical) | Standard power supply requirement for the MHO series. | | **Frequency Range** | 1.0 MHz to 150.0 MHz | Depends on the specific custom frequency requested. | | **RoHS Status** | Compliant (-R suffix) | The "R" indicates the part is lead-free and RoHS compliant. | --- ## Breakdown of Part Number Codes The alphanumeric string defines the physical and electrical constraints: 1. **MHO+**: Refers to the product series (High-performance 5.0V HCMOS/TTL oscillators). 2. **7**: Indicates the frequency stability (typically $\pm 25$ ppm or $\pm 50$ ppm depending on the datasheet revision). 3. **7**: Represents the operating temperature range (often $-40^\circ \text{C}$ to $+85^\circ \text{C}$ for industrial grade). 4. **F**: Refers to the Symmetry/Duty Cycle (usually 45/55%). 5. **CG**: Specific internal manufacturing or output configuration codes. 6. **-R**: RoHS Compliant. --- ## Key Features & Applications ### Features * **Hermetically Sealed:** The metal package is vacuum-sealed or filled with inert gas to protect the quartz crystal from moisture and aging. * **Low Jitter:** Designed for precise timing in data communication. * **Tri-state Functionality:** Often includes an Enable/Disable pin to save power or allow bus-sharing. ### Common Applications * **Networking:** Routers, switches, and modems. * **Industrial Control:** PLCs and embedded system clocks. * **Legacy Computing:** Motherboards or expansion cards requiring 5V logic signals. * **Test Equipment:** Signal generators and frequency counters. --- ## Basic Connection Diagram The device is a 4-pin active component housed in a 14-pin footprint (only 4 pins are usually present). ```text Pin 1: N/C or Tri-state Enable Pin 7: Ground (Case) Pin 8: Output Signal Pin 14: Vcc (+5.0V) ```