The **MHO+35FFD-R** is a specific part number typically associated with **MHO+ Series TCXO (Temperature Compensated Crystal Oscillators)**, often manufactured by companies like MtronPTI. These components are critical for providing a stable frequency reference in electronic circuits where temperature fluctuations might otherwise cause frequency drift. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Type** | TCXO | Temperature Compensated Crystal Oscillator | | **Output Type** | HCMOS / TTL | Standard logic level output for digital circuits | | **Supply Voltage** | 5.0V (Typical) | Operates on a standard 5V rail (depending on series) | | **Package** | 14-pin DIP / Flatpack | Usually a rectangular metal can package | | **Frequency Stability** | ±1.0 ppm to ±5.0 ppm | High precision across the operating temperature range | | **Operating Temp** | -40°C to +85°C | Industrial grade temperature rating | --- ### 2. Key Internal Components An electronic part like the MHO+35FFD-R is not a single crystal, but an integrated module consisting of several parts: 1. **Quartz Crystal Resonator:** The heart of the unit that provides the fundamental vibration frequency. 2. **Compensation Network:** A circuit (often involving thermistors and varactors) that senses the ambient temperature and adjusts the voltage to the crystal to pull the frequency back to its nominal value. 3. **Buffer Amplifier:** Ensures the output signal has enough strength to drive other components without loading down the internal oscillator. 4. **Voltage Regulator:** Internal regulation to ensure that small changes in the 5V input do not affect the frequency stability. --- ### 3. Application Use Cases Because of its high stability and rugged packaging, this part is commonly found in: * **Telecommunications:** Base stations and synchronization hardware. * **Military/Aerospace:** Radio communication sets and navigation equipment. * **Test & Measurement:** Frequency counters and signal generators. --- ### 4. Part Number Breakdown (Typical) * **MHO+**: Series Name (TCXO with specific stability/output characteristics). * **35**: Often refers to the supply voltage (e.g., 5.0V or 3.3V variants). * **FF**: Coding for temperature range and frequency stability. * **D**: Package style identifier. * **R**: RoHS compliance (Lead-free). ---