The **MHO+11TCD-R** is a specific model within the series of high-precision, high-frequency crystal oscillators, typically categorized as a **TCXO (Temperature Compensated Crystal Oscillator)**. These components are essential in telecommunications and radio frequency (RF) applications where frequency stability is critical. --- ### 1. Key Technical Specifications The following table outlines the typical electrical and mechanical parameters for this component: | Parameter | Specifications (Typical) | | :--- | :--- | | **Component Type** | Temperature Compensated Crystal Oscillator (TCXO) | | **Output Type** | Clipped Sine Wave / CMOS (Model dependent) | | **Nominal Frequency** | Usually ranges between 10 MHz to 40 MHz | | **Supply Voltage (Vcc)** | +3.3V DC (standard for '11' series) | | **Frequency Stability** | ±0.5 ppm to ±2.5 ppm (over temp range) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Package Style** | SMD (Surface Mount Device) | --- ### 2. Breakdown of the Model Code While naming conventions vary slightly by manufacturer (often Mercury Electronic or similar precision timing brands), the code generally breaks down as follows: * **MHO:** Series identifier for High-Stability Oscillators. * **+11:** Typically denotes the input voltage (e.g., 3.3V) and package size (e.g., 5.0 x 3.2 mm or 7.0 x 5.0 mm). * **TC:** Stands for **Temperature Compensated**. This means the circuit contains a compensation network that adjusts the crystal's frequency based on ambient temperature to prevent "drift." * **D:** Often refers to the frequency stability grade (e.g., ±1.5ppm or ±2.0ppm). * **R:** Indicates **RoHS Compliance** (Lead-free) or Reel packaging for automated assembly. --- ### 3. Internal Components & Functionality The MHO+11TCD-R is not a simple quartz crystal; it is an active integrated circuit consisting of several parts: 1. **Quartz Crystal Blank:** The vibrating element that provides the base frequency. 2. **Varactor Diode:** Used to pull the frequency of the crystal to the desired target. 3. **Thermistor Network:** Measures the ambient temperature and sends a correction voltage to the varactor. 4. **Buffer Amplifier:** Ensures the output signal is strong enough to drive other components on the PCB without loading the oscillator circuit. ### 4. Common Applications Due to its high stability, this part is found in: * **GPS Receivers:** Where precise timing is needed to calculate position. * **Wireless Communication:** Base stations, Wi-Fi routers, and Point-to-Point radios. * **IoT Devices:** Low-power wide-area networks (LPWAN) that require reliable frequency locking. ---