The **MHO+28TCD-R** belongs to a specialized category of high-reliability components, typically identified as a **Crystal Oscillator** or a **Clock Module** produced by manufacturers like MtronPTI. These components are designed for high-performance timing in telecommunications, aerospace, or industrial computing. --- ### 1. Component Overview The "MHO" series generally refers to **Metal Hybrid Oscillators**. These are high-stability clock sources housed in robust metal packages to ensure durability and electromagnetic interference (EMI) shielding. ### 2. Technical Specifications While specific datasheets can vary by production year, the nomenclature typically breaks down as follows: | Feature | Specification Details | | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) or VCXO (Voltage Controlled) | | **Supply Voltage** | Usually +5.0V or +3.3V (indicated by the '28' or internal coding) | | **Output Type** | CMOS / TTL Compatible | | **Package Style** | 14-pin DIP (Dual In-line Package) or 4-pin Half-size DIP | | **Frequency Range** | Typically ranges from 1.0 MHz to 150.0 MHz | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | --- ### 3. Key Electronic Characteristics * **Frequency Stability:** These parts are engineered for low "drift." They maintain a consistent frequency even when the surrounding temperature changes. * **Tri-State Functionality:** The **"T"** in the suffix often indicates "Tri-state" capability. This allows the output to be disconnected (high impedance mode), which is useful for testing or power-saving in complex circuits. * **RoHS Compliance:** The **"-R"** suffix stands for **RoHS Compliant**, meaning the part is manufactured without lead or other hazardous materials, meeting international environmental standards. * **Hermetic Sealing:** The metal casing is usually resistance-welded to create a vacuum or nitrogen-filled environment, protecting the quartz crystal from moisture and aging. --- ### 4. Common Applications Due to its high reliability and metal housing, the MHO+28TCD-R is commonly found in: 1. **Network Switches/Routers:** Providing the master clock for data packet synchronization. 2. **Industrial Controllers:** Ensuring precise timing for PLCs (Programmable Logic Controllers). 3. **Embedded Systems:** Acting as the heartbeat for microprocessors in harsh electrical environments.