The **MHO322TAG-R** is a high-performance **Oven Controlled Crystal Oscillator (OCXO)** manufactured by MtronPTI. These components are critical in electronics where extreme frequency stability and low phase noise are required, far exceeding the capabilities of standard crystal oscillators (CXO) or temperature-compensated oscillators (TCXO). --- ## 1. Core Technical Specifications Below is a breakdown of the primary electronic characteristics of the MHO322TAG-R: | Feature | Specification | Description | |:---|:---|:---| | **Frequency Range** | Typically 10.000 MHz | High-precision reference frequency. | | **Output Type** | HCMOS / ACMOS | Compatible with standard digital logic levels. | | **Supply Voltage** | 3.3V or 5.0V | Dependent on specific sub-model configuration. | | **Frequency Stability** | ±5 ppb to ±50 ppb | Extremely stable against temperature fluctuations. | | **Operating Temp** | -40°C to +85°C | Industrial grade temperature range. | | **Package Style** | Through-hole (DIP) | Designed for robust PCB mounting. | --- ## 2. Key Electronic Internal Components The "MHO" series utilizes an internal oven structure to maintain a constant temperature for the quartz crystal. This eliminates frequency "drift" caused by external environment changes. ### A. The Oven Control Circuit The internal heater and thermistor work in a feedback loop. This circuit ensures that the crystal remains at its "turnover point" (the temperature where the frequency-vs-temperature curve is flattest), usually around 75°C to 85°C. ### B. SC-Cut Crystal Most high-end OCXOs like this one use an **SC-cut (Stress Compensated)** quartz crystal. * **Benefit:** Lower sensitivity to thermal shock and mechanical vibration. * **Benefit:** Better aging characteristics compared to AT-cut crystals. ### C. Low Noise Regulator To achieve ultra-low phase noise, the internal electronics include a dedicated voltage regulator to shield the oscillator from power supply ripples or noise. --- ## 3. Typical Applications Because of its high stability and low jitter, the MHO322TAG-R is commonly found in: 1. **Telecommunications:** Base stations (LTE/5G) and small cells. 2. **Test & Measurement:** Frequency counters and signal generators. 3. **Network Timing:** Synchronous Ethernet (SyncE) and IEEE 1588 PTP clocks. 4. **Radar Systems:** Where precise timing is necessary for target detection. --- ## 4. Pinout Configuration (Standard) | Pin Number | Function | Description | |:---:|:---|:---| | **1** | Voltage Control (Vc) | Allows for fine frequency tuning via external voltage. | | **2** | Reference Voltage | Internal reference output (if applicable). | | **3** | Supply Voltage (Vcc) | Power input for the heater and oscillator. | | **4** | RF Output | The high-stability clock signal output. | | **5** | Case Ground | Electrical and thermal grounding. |