The **MHO+58FBD-R** is a high-precision, high-frequency **Oven Controlled Crystal Oscillator (OCXO)** manufactured by MtronPTI. These components are critical in telecommunications and aerospace applications where frequency stability over temperature variations is paramount. --- ### 1. Key Technical Specifications The following table outlines the typical electrical and mechanical characteristics for the MHO series, specifically focusing on the 58FBD variant: | Parameter | Specification Details | | :--- | :--- | | **Component Type** | Oven Controlled Crystal Oscillator (OCXO) | | **Output Type** | CMOS / HCMOS | | **Supply Voltage (Vcc)** | Typically +5.0V or +3.3V (Model dependent) | | **Frequency Stability** | ±50 ppb (parts per billion) to ±100 ppb | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Package Style** | Through-hole (DIP-14 compatible footprint) | | **RoHS Status** | Compliant (indicated by the -R suffix) | --- ### 2. Functional Breakdown #### A. The "Oven" Mechanism Unlike standard oscillators (XO) or temperature-compensated oscillators (TCXO), an **OCXO** contains an internal heating element and a thermistor. It keeps the quartz crystal at a specific "turning point" temperature (usually around 75°C to 85°C). Because the internal temperature remains constant regardless of the outside environment, the frequency drift is near zero. #### B. Naming Convention Deciphered * **MHO:** MtronPTI High-Stability OCXO Series. * **58:** Refers to the specific package size and pin configuration (often a 20.3 x 12.7 mm footprint). * **FBD:** Internal codes for frequency stability, temperature range, and output waveform (HCMOS). * **-R:** Indicates RoHS compliance (lead-free). --- ### 3. Applications Due to its high stability, the MHO+58FBD-R is commonly found in: 1. **Base Stations:** Synchronization for 4G/5G LTE cellular towers. 2. **Test Equipment:** Frequency counters and signal generators. 3. **Network Switches:** High-speed data transmission timing. 4. **Satellite Communications:** Ground station frequency references. --- ### 4. Circuit Implementation Tips * **Warm-up Time:** Remember that OCXOs require a "warm-up" period (usually 2 to 5 minutes) before they reach their specified stability. * **Power Consumption:** These parts draw significantly more current (up to 500mA during warm-up) than standard oscillators because of the internal heater. * **Placement:** Avoid placing the component near cooling fans or high-airflow areas, as this can force the heater to work harder and may introduce slight thermal noise.