The **MHO+35TAD-R** is a specific series of high-precision crystal oscillators manufactured by **MtronPTI**. These components are widely used in telecommunications and industrial applications where stable timing is critical. ### 1. Component Overview The MHO series generally refers to **Metal Half-size (DIP-8)** crystal oscillators. They are known for their rugged construction and reliable performance under varying environmental conditions. | Feature | Specification Details | | :--- | :--- | | **Manufacturer** | MtronPTI | | **Package Type** | DIP-8 (Half-size metal can) | | **Oscillator Type** | HCMOS/TTL Compatible | | **Output Type** | Fixed Frequency Square Wave | | **RoHS Status** | Compliant (indicated by the 'R' suffix) | --- ### 2. Breakdown of the Part Number Understanding the nomenclature helps identify the exact electrical characteristics of the part: * **MHO**: The Series prefix (Half-size, 8-pin DIP metal package). * **+**: Often indicates a specific lead-free or enhanced version. * **3**: Represents the Operating Voltage (Typically **3.3V**). * **5**: Represents the Frequency Stability (Commonly **±50 ppm**). * **T**: Operating Temperature Range (Typically **-40°C to +85°C**, Industrial Grade). * **AD**: Internal code for output symmetry and pull-up resistor configurations. * **-R**: Indicates **RoHS Compliance**. --- ### 3. Electrical Characteristics These parts are designed to be "plug-and-play" timing sources for digital circuits. 1. **Supply Voltage ($V_{DD}$):** Usually operates at 3.3V, making it compatible with modern FPGAs and Microcontrollers. 2. **Frequency Range:** Available in various frequencies, typically from 1.000 MHz to over 100 MHz (the specific frequency is usually stamped on the top of the metal can). 3. **Output Load:** Designed to drive a 15pF to 50pF capacitive load. 4. **Symmetry:** Usually 45/55%, ensuring a clean clock signal for synchronous logic. --- ### 4. Pinout Configuration (DIP-8) Even though it is an 8-pin footprint, only four pins are typically used: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | N/C or Tri-state | No connection or Output Enable/Disable | | **4** | Case Ground | Connected to the metal lid for EMI shielding | | **5** | Output | The generated clock signal | | **8** | $+V_{DD}$ | Positive power supply input | --- ### 5. Common Applications * **Networking:** Routers, switches, and modems. * **Industrial:** PLC controllers and embedded computing. * **Legacy Systems:** Replacement parts for older DIP-based PCBs requiring stable 3.3V clocking.