The **MHO+55FAAD-R** is a high-performance **Crystal Oscillator** (specifically a clock oscillator) manufactured by MtronPTI. It is designed to provide a precise frequency reference for electronic circuits. ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Frequency Range** | 1.0 MHz to 156.25 MHz | Standard operating range. | | **Supply Voltage (Vcc)** | 5.0 Volts | Standard logic level power supply. | | **Output Type** | HCMOS / TTL | Compatible with high-speed CMOS and TTL logic. | | **Package Style** | 14-pin DIP (Full size) | Metal "Through-Hole" package for robust mounting. | | **Stability** | ±100 ppm (Typical) | Frequency deviation over temperature and time. | | **Operating Temp** | 0°C to +70°C | Commercial grade temperature range. | --- ### 2. Physical and Electrical Architecture The internal structure consists of several critical electronic stages: 1. **Quartz Crystal Blank:** A precision-cut quartz wafer that vibrates at a specific frequency when an electric field is applied (Piezoelectric effect). 2. **Oscillator IC:** An integrated circuit that provides the gain necessary to sustain oscillation and shapes the waveform into a digital square wave. 3. **Bypass Capacitor:** Usually integrated inside the metal can to filter power supply noise and ensure signal integrity. 4. **Metal Shield (EMI Protection):** The entire assembly is housed in a hermetically sealed metal package to prevent Electromagnetic Interference (EMI) from affecting the signal. --- ### 3. Pin Configuration (14-Pin DIP Layout) Although it has a 14-pin footprint, only four pins are typically functional: * **Pin 1:** NC (No Connect) or Tri-state Enable (allows the output to be turned off). * **Pin 7:** Case Ground (Vss). * **Pin 8:** Output Signal (The clock pulse). * **Pin 14:** Supply Voltage (+5.0V Vcc). --- ### 4. Typical Applications This component is used in legacy and industrial systems where stability and a 5V logic level are required: * **Microprocessor Clocks:** Providing the heartbeat for CPUs and Microcontrollers. * **Data Communications:** Synchronizing timing for serial and parallel data transfers. * **Embedded Systems:** Industrial controllers and automation hardware. * **Test & Measurement:** Oscilloscopes and signal generators.