The **MHO317FCG-R** is a high-performance **Surface Mount (SMD) Clock Oscillator**. It belongs to the MHO series manufactured by **MtronPTI**, commonly used in applications requiring precise timing and frequency control. --- ## 1. Core Technical Specifications The part number "MHO317FCG-R" provides specific information about its electrical characteristics and physical build. | Parameter | Specification | Details | | :--- | :--- | :--- | | **Type** | Clock Oscillator | Fixed frequency signal source | | **Package Size** | 5.0 x 7.0 mm | Standard 4-pad SMD Ceramic package | | **Voltage Supply** | 3.3V (Typical) | Standard low-voltage operation | | **Output Type** | HCMOS / TTL | High-speed CMOS compatible | | **Stability** | ±100 ppm | Frequency stability over temperature | | **RoHS Status** | Compliant | "-R" suffix denotes Lead-Free/RoHS | --- ## 2. Pin Configuration (Functional Parts) Standard 5x7mm oscillators like the MHO317 series typically utilize a 4-pad layout: 1. **Pad 1: Tri-state (Enable/Disable)** * Allows the output to be turned on or off. High (or floating) = Output active; Low = High impedance (Standby). 2. **Pad 2: Ground (VSS)** * Connects to the system common ground. 3. **Pad 3: Output** * Delivers the square wave frequency to the microcontroller or FPGA. 4. **Pad 4: Supply Voltage (VDD)** * Power input (3.3V). --- ## 3. Internal Components Internally, this component consists of several integrated sub-parts: ### A. The Quartz Crystal Blank * A precision-cut piece of quartz that vibrates at a specific resonant frequency when an electric field is applied (the Piezoelectric effect). ### B. Oscillator IC (Application Specific IC) * The "brains" of the part. It contains the inverter circuitry to sustain oscillation and the output buffer to drive the signal across the PCB traces. ### C. Ceramic Base & Metal Lid * The **Hermetic Seal** is crucial. The crystal is vacuum-sealed or nitrogen-filled inside the ceramic housing to prevent aging and frequency drift caused by moisture or oxidation. --- ## 4. Typical Applications Because of its 3.3V HCMOS output, this part is frequently found in: * **Networking Equipment:** Routers, switches, and Ethernet controllers. * **Embedded Systems:** Microprocessor clocks and FPGA timing. * **Industrial Automation:** PLCs and sensor hubs. * **Storage:** Fiber channel and SATA interfaces. ---