The **MHO+51FCD-R** is a specific type of **Crystal Oscillator** (often referred to as a Clock Oscillator). It is commonly used in digital circuits to provide a stable, consistent timing signal (clock pulse) required for microprocessors and other logic devices. --- ## 1. Component Overview This part belongs to the **MHO series**, which typically features a Full-Size (14-pin DIP compatible) or Half-Size (8-pin DIP compatible) metal package. The "R" suffix usually denotes **RoHS Compliance**. ### Key Technical Specifications | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | | **Package Style** | 14-Pin DIP (Full Size) / 4 Pins connected | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage (Vcc)** | Usually 5.0V (Standard for +51 series) | | **Frequency Stability** | Typically ±50ppm or ±100ppm | | **Operating Temperature** | 0°C to +70°C (Commercial Grade) | --- ## 2. Pin Configuration (Internal Connections) Even though the package looks like a 14-pin Integrated Circuit, it only uses 4 functional pins located at the corners: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC / OE | No Connection or Output Enable (Tri-state) | | **7** | GND | Ground / Case Ground | | **8** | Output | The generated square wave clock signal | | **14** | Vcc | Positive Power Supply (+5V) | --- ## 3. Core Features * **Metal Can Shielding:** The component is housed in a hermetically sealed metal package. This provides excellent EMI (Electromagnetic Interference) shielding, ensuring the clock signal is not distorted by outside noise and does not interfere with other parts. * **Fixed Frequency:** Unlike a simple crystal, this is an **active** component. It contains the quartz crystal plus the internal oscillation circuitry, meaning you only need to apply power to get a clock signal. * **Reliability:** Designed for "Through-Hole" mounting on PCBs, making it robust for industrial or older consumer electronics. --- ## 4. Part Number Breakdown (Typical Decoding) * **MHO:** Series Name (Metal Hole Oscillator). * **+:** Usually indicates a specific manufacturing process or RoHS compliance. * **5:** Represents the voltage (5V). * **1:** Frequency stability code (often ±100ppm). * **F:** Frequency output type (Fixed). * **CD:** Commercial Temp range / Duty Cycle specs. * **R:** RoHS Compliant. ---