## MHO+55FBD-R: Component Overview The **MHO+55FBD-R** is a high-precision **TCXO (Temperature Compensated Crystal Oscillator)** manufactured by MtronPTI. It is designed for applications requiring high frequency stability over a wide temperature range, typically used in telecommunications and networking equipment. --- ### 1. Key Technical Specifications | Parameter | Specification Details | | :--- | :--- | | **Component Type** | Temperature Compensated Crystal Oscillator (TCXO) | | **Package Style** | 5x7mm Surface Mount Device (SMD) | | **Output Type** | HCMOS / TTL | | **Supply Voltage (Vcc)** | +5.0 VDC | | **Frequency Range** | Typically 1.0 MHz to 160.0 MHz | | **Stability** | ±1.0 ppm to ±5.0 ppm (depending on specific variant) | | **Operating Temp** | -40°C to +85°C (Standard Industrial) | --- ### 2. Internal Electronic Structure The "MHO" series integrates several internal electronic stages to ensure signal integrity: 1. **Quartz Crystal Resonator:** The heart of the component, providing the fundamental frequency. 2. **Compensation Network:** A thermistor-resistor network that adjusts the load capacitance of the crystal to counteract frequency drift caused by temperature changes. 3. **Oscillator IC:** An active circuit that maintains the oscillation and buffers the output signal. 4. **Voltage Regulator:** Internal circuitry to minimize the impact of input supply voltage fluctuations on the frequency. --- ### 3. Pin Configuration (Typical 4-Pad Layout) | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | **Vcon / NC** | Voltage Control (if VCTCXO) or No Connection | | **2** | **GND** | Case Ground and Circuit Return | | **3** | **Output** | HCMOS/TTL Square Wave Signal | | **4** | **Vcc** | +5.0V Power Supply Input | --- ### 4. Part Number Breakdown: MHO+55FBD-R * **MHO+:** Series designation (High-frequency TCXO). * **5:** 5.0 Volt supply voltage. * **5:** Stability code (often representing ±5.0 ppm or a specific temperature range). * **F:** Temperature Range code (usually -40°C to +85°C). * **BD:** Output type and Symmetry (HCMOS). * **-R:** RoHS Compliant (Lead-free). --- ### 5. Common Applications * **Wireless Communication:** Base stations and point-to-point radio. * **Ethernet Switches:** Providing the clock source for high-speed data transmission. * **GPS/GNSS:** Precision timing for location tracking. * **Test & Measurement:** Handheld frequency counters and signal generators.