The **MHO+73TDD-R** is a specific part number typically associated with **MHO+ Series** high-precision quartz crystal oscillators, often manufactured by companies like **MtronPTI**. These components are critical for providing a stable clock signal in digital circuits. --- ### 1. Technical Specifications The part number is a composite code where each character represents a specific performance characteristic. | Feature | Specification | Description | | :--- | :--- | :--- | | **Type** | Crystal Oscillator (XO) | A complete timing circuit in a single package. | | **Package** | 14-pin DIP / Half-size DIP | Often a "DIL" metal package for through-hole mounting. | | **Supply Voltage** | 5.0V or 3.3V | Standard logic levels for industrial/telecom equipment. | | **Output Type** | HCMOS/TTL | Compatible with standard CMOS and TTL digital logic. | | **Frequency Stability** | ±100ppm to ±25ppm | High precision over the operating temperature range. | | **Operating Temp** | -40°C to +85°C | Typically "Industrial" grade (denoted by 'T' in some series). | --- ### 2. Breakdown of the Part Number While manufacturers vary slightly, the "MHO+73TDD-R" nomenclature generally breaks down as follows: * **MHO+**: The series prefix (Standard Clock Oscillator). * **73**: Usually refers to the voltage or package size (e.g., 3.3V operation). * **T**: Temperature Range (Standard Industrial: -40°C to +85°C). * **DD**: Frequency stability code (often indicates ±25ppm or ±50ppm). * **R**: RoHS Compliant (Lead-free construction). --- ### 3. Key Applications Because of its stability and metal casing (which provides EMI shielding), this part is commonly used in: 1. **Telecommunications**: Base stations and switching hardware. 2. **Industrial Control**: PLCs and high-reliability automation sensors. 3. **Networking**: Routers and Ethernet switches requiring precise timing. 4. **Legacy Systems**: Often used as a high-quality replacement for older 14-pin DIP oscillators. --- ### 4. Connection Diagram (Internal) Standard 4-pin or 14-pin DIP oscillators follow a specific pinout: ```text Pin 1: NC (No Connection) or Tri-state Enable/Disable Pin 7: Case Ground (GND) Pin 8: Output (Clock Signal) Pin 14: Vcc (+ Supply Voltage) ``` ---