The **MHO372FAD-R** is a specific part number typically associated with **Quartz Crystal Oscillators**, specifically in the **HCMOS/TTL** compatible family. These components are used to provide a stable clock signal for microprocessors, digital circuits, and communication equipment. --- ### 1. Key Technical Specifications The alphanumeric code describes its physical and electrical characteristics. While specific frequency values vary by sub-ordering codes, the general specifications for this series are as follows: | Feature | Specification | | :--- | :--- | | **Output Type** | HCMOS / TTL | | **Package Style** | 14-pin DIP (DIL) - Often 4 pins connected | | **Supply Voltage ($V_{DD}$)** | 5.0V DC (Standard) | | **Operating Temperature** | 0°C to +70°C (Standard Commercial) | | **Frequency Stability** | ±100 ppm (Typical for -R series) | | **Duty Cycle** | 40/60% to 45/55% | | **Mounting Type** | Through-Hole | --- ### 2. Pin Configuration (14-Pin DIP Layout) Although it uses a 14-pin footprint, only four pins are usually functional to simplify PCB routing. | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC or Tri-state | No connection or Output Enable/Disable | | **7** | GND | Circuit Ground | | **8** | Output | The generated clock frequency signal | | **14** | $V_{DD}$ | Power Supply (+5V) | --- ### 3. Component Breakdown * **MHO Series:** Represents the manufacturer's series for Half-Size or Full-Size metal "can" oscillators. * **37:** Typically refers to the package size and voltage (5V, Full-size DIP). * **FAD:** Indicates specific internal configurations regarding symmetry, enable/disable functions, and operating temperature range. * **-R:** Usually denotes **RoHS Compliance**, meaning the part is lead-free and meets environmental safety standards. --- ### 4. Typical Applications These oscillators are "active" components, meaning they contain the crystal and the oscillation circuitry in one shielded metal housing. They are commonly found in: 1. **Legacy Computing:** Motherboards and peripheral controllers. 2. **Industrial Control:** PLCs and timing modules. 3. **Networking:** Routers and switches requiring a steady 5V clock source. 4. **Embedded Systems:** Providing a heartbeat for older 8-bit or 16-bit microcontrollers.