The **MHO+36FCD-R** belongs to a specific category of high-precision electronic components, typically identifying as an **OCXO (Oven Controlled Crystal Oscillator)** or a high-stability clock module manufactured by companies like MtronPTI. Below is a detailed breakdown of the electronic parts and characteristics associated with this series. --- ## 1. Technical Specifications The "MHO" series generally represents a line of metal-can, through-hole oscillators designed for high reliability. | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Oven Controlled Crystal Oscillator (OCXO) | | **Package Style** | DIP-14 or similar Metal Header (Hermetically Sealed) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | Usually 3.3V or 5.0V | | **Stability** | Extremely high (ppb - parts per billion range) | | **Operating Temperature** | Standard Industrial (-40°C to +85°C) | --- ## 2. Key Internal Electronic Parts An OCXO like the MHO+36FCD-R is not just a simple crystal; it is a complex circuit containing several sub-components: ### A. The Quartz Crystal (SC-Cut or AT-Cut) The heart of the unit. In "MHO" high-end models, an **SC-cut (Stress Compensated)** crystal is often used because it is less sensitive to mechanical and thermal shock. ### B. The Heating Element (Oven) To maintain frequency stability, the crystal is placed inside a tiny internal oven. * **Thermistor:** Senses the internal temperature. * **Heating Resistor/Transistor:** Dissipates heat to keep the crystal at a specific "turning point" temperature (usually around 75°C to 85°C). ### C. Control Circuitry * **Voltage Regulator:** Ensures that fluctuations in input power do not affect the frequency. * **Varactor Diode:** Used for frequency tuning (if the model supports electronic frequency control). * **Buffer Amplifier:** Strengthens the output signal and protects the crystal from "load pulling" (changes in frequency caused by external circuit impedance). --- ## 3. Part Number Decoder (Typical) While exact prefixes can vary by manufacturer, the string generally breaks down as follows: 1. **MHO:** Series designation (Metal Hermetic Oscillator). 2. **36:** Often refers to the physical package size or a specific voltage code. 3. **F:** Frequency stability identifier. 4. **CD:** Commercial/Industrial temperature range and Duty Cycle specifications. 5. **R:** RoHS Compliant (Lead-free). --- ## 4. Pinout Configuration Most oscillators in this package follow a standard 4-pin or 14-pin DIP footprint: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | N/C or V_control | No connection or Voltage Control for tuning. | | **7** | GND | Case and Circuit Ground. | | **8** | Output | The generated clock signal (Square wave). | | **14** | Vcc | Positive Supply Voltage. | --- ## 5. Typical Applications Because of its high stability, the MHO+36FCD-R is used in: * **Telecommunications:** Base stations and small cells. * **Test Equipment:** Frequency counters and synthesizers. * **GPS/GNSS:** Precision timing for satellite synchronization. ---