The **MHO+35TBD-R** is a specific series of high-precision, high-frequency **Crystal Oscillators** (XO), typically manufactured by companies like MtronPTI. These components are designed for aerospace, defense, and high-reliability industrial applications. --- ## 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics. Below is a breakdown of the typical specifications for this series: | Feature | Specification Details | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Package Style** | 14-pin DIP (Dual In-line Package) - Thru-hole | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | Typically 5.0V or 3.3V (depending on sub-variant) | | **Frequency Range** | Usually 1.0 MHz to 100+ MHz | | **Operating Temp** | -40°C to +85°C (Industrial) or -55°C to +125°C (Military) | | **Stability** | ±50ppm to ±100ppm (standard) | --- ## 2. Component Breakdown The "MHO" series is categorized as a **Master House Oscillator**. Here is what the internal electronic parts consist of: ### A. Quartz Crystal Blank The heart of the component is a high-grade quartz crystal cut to a specific angle (usually AT-cut). This provides the fundamental mechanical resonance. ### B. Oscillator IC An integrated circuit (IC) is paired with the crystal. This IC contains: * **The Inverter:** To maintain the oscillation. * **Feedback Resistors:** To stabilize the loop. * **Output Buffers:** To ensure the signal can drive other logic components (CMOS/TTL levels) without degrading the waveform. ### C. Bypass Capacitors Internal ceramic capacitors are often included within the metal can to filter power supply noise, ensuring a "clean" clock signal. --- ## 3. Physical Construction * **Hermetic Sealing:** The part is housed in a resistance-welded metal package. This protects the internal quartz and circuitry from moisture and atmospheric pressure changes. * **The "-R" Suffix:** This generally indicates **RoHS Compliance**, meaning the lead (Pb) content in the pins and solder is within environmental regulatory limits. --- ## 4. Common Pinout (14-pin DIP) Though it occupies a 14-pin footprint, only four pins are typically functional: | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | NC or Tri-state | No connection or Output Enable/Disable | | **Pin 7** | GND | Circuit Ground | | **Pin 8** | Output | The Clock Signal output | | **Pin 14** | Vcc | Positive Supply Voltage | ---