The **MHO328FAD-R** is a specific part number belonging to the **MHO Series** of high-performance Crystal Oscillators manufactured by **MtronPTI**. These components are essential for providing precise timing signals in electronic circuits. Below is a detailed breakdown of its technical characteristics and internal parts. --- ### 1. Component Overview The MHO328FAD-R is a **Crystal Clock Oscillator** housed in a standard 14-pin DIP (Dual In-line Package) footprint, though it typically only uses 4 pins. | Feature | Specification | | :--- | :--- | | **Package Type** | 14-pin DIP (Full Size) | | **Output Type** | HCMOS / TTL Compatible | | **Voltage Supply** | 5.0V (Standard for the 32 series) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Frequency Stability** | ±100 ppm (standard, varies by suffix) | | **RoHS Compliance** | Yes ("-R" suffix indicates Lead-Free/RoHS) | --- ### 2. Internal Electronic Construction To understand the "parts" of the MHO328FAD-R, we must look at its internal hybrid circuitry: 1. **Quartz Crystal Blank:** The heart of the component. It is a precision-cut piece of quartz that vibrates at a specific resonant frequency when an electric field is applied. 2. **Oscillator IC:** An integrated circuit that contains the inverter/amplifier required to sustain oscillation and the output buffer to drive the signal to the rest of the PCB. 3. **Bypass Capacitor:** Internal capacitance to filter noise from the power supply ($V_{cc}$), ensuring signal purity. 4. **Metal Can Encapsulation:** A hermetically sealed metal housing that protects the internal quartz from moisture and electromagnetic interference (EMI). --- ### 3. Pin Configuration Even though it occupies a 14-pin footprint, only 4 pins are active: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC or Tri-state | No connection or Output Enable/Disable | | **7** | GND | Circuit Ground | | **8** | Output | The generated clock signal (Square Wave) | | **14** | $V_{cc}$ | +5.0V Power Supply | --- ### 4. Decoding the Part Number The alphanumeric string provides specific details about the component's build: * **MHO:** MtronPTI High Output (Series Name). * **3:** 5.0 Volt Supply. * **2:** Frequency Stability (±100ppm). * **8:** 45/55% Symmetry (Duty Cycle). * **F:** Fixed Frequency (No Tristate on Pin 1). * **A:** Operating Temperature Range (-40°C to +85°C). * **D:** 14-pin DIP Package. * **-R:** RoHS Compliant. --- ### 5. Common Applications * **Industrial Controllers:** Providing stable pulses for PLCs. * **Legacy Computing:** Replacement parts for older motherboards requiring 5V logic. * **Communications:** Timing for data transmission hardware.