The **MHO325TAG-R** is a high-precision, surface-mount (SMD) **TCXO** (Temperature Compensated Crystal Oscillator). It is widely used in telecommunications and navigation systems where frequency stability over a wide temperature range is critical. --- ## 1. Technical Specifications Below are the primary electrical and physical characteristics of the MHO325TAG-R: | Parameter | Specification | | :--- | :--- | | **Component Type** | TCXO (Temperature Compensated Crystal Oscillator) | | **Standard Frequency** | Typically 10.000 MHz to 52.000 MHz (Model dependent) | | **Package Size** | 3.2mm x 2.5mm (SMD 4-Pad) | | **Supply Voltage ($V_{cc}$)** | 1.8V to 3.3V (Typical) | | **Output Type** | Clipped Sinewave / CMOS | | **Frequency Stability** | ±0.5 ppm to ±2.5 ppm (Over temperature) | | **Operating Temp Range** | -40°C to +85°C | --- ## 2. Key Electronic Features * **Temperature Compensation:** Unlike standard crystals, this part includes an internal compensation circuit (thermistor network or digital compensation) that adjusts the frequency to counteract shifts caused by ambient temperature changes. * **Low Phase Noise:** Designed to minimize "jitter," making it suitable for high-speed data transmission and GPS/GNSS synchronization. * **Low Power Consumption:** Optimized for battery-powered mobile devices and portable IoT sensors. * **Clipped Sinewave Output:** Reduces electromagnetic interference (EMI) compared to square-wave oscillators. --- ## 3. Pin Configuration (Typical 4-Pad Layout) The device follows a standard footprint for 3225-sized oscillators: | Pin Number | Function | Description | | :---: | :--- | :--- | | **1** | Vcon / NC | Voltage Control (for VCTCXO) or No Connection | | **2** | GND | Ground Connection | | **3** | Output | Frequency Signal Output | | **4** | $V_{cc}$ | Power Supply Voltage | --- ## 4. Common Applications Due to its high stability and small footprint, the MHO325TAG-R is found in: 1. **GNSS/GPS Modules:** Ensuring fast time-to-first-fix (TTFF) by maintaining precise timing. 2. **Wireless Communications:** LTE, 5G small cells, and Wi-Fi 6 modules. 3. **IoT Devices:** Low-power wide-area networks (LPWAN) like LoRa or Sigfox. 4. **Smart Meters:** Precision timing for utility billing and data logging. ---