The **MHO+13FDG-R** is a specific model within the category of **Surface Mount (SMD) Quartz Crystal Oscillators**. These components are critical for providing a precise clock signal to microprocessors and digital circuits. --- ### 1. Technical Specifications The "MHO" series typically refers to high-stability, CMOS-compatible oscillators. Below is a breakdown of the typical electronic characteristics for this specific part: | Parameter | Specification | | :--- | :--- | | **Output Type** | HCMOS / TTL Compatible | | **Package Type** | 4-Pin SMD (Ceramic) | | **Supply Voltage (Vdd)** | Usually 3.3V or 5.0V (Model dependent) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Frequency Stability** | ±25ppm to ±100ppm | | **Load Capacitance** | 15pF to 50pF | ### 2. Physical Layout & Pinout As an SMD device, it typically follows a standard 4-pad configuration: 1. **Pad 1: E/D (Enable/Disable)** – Used to turn the output on or off to save power. 2. **Pad 2: GND** – Case ground and circuit negative. 3. **Pad 3: Output** – The square wave clock signal output. 4. **Pad 4: Vdd** – Positive DC supply voltage. ### 3. Key Electronic Functions * **Frequency Generation:** It uses a piece of quartz crystal that vibrates at a specific frequency when voltage is applied (the piezoelectric effect). * **Active Circuitry:** Unlike a simple 2-pin crystal, the MHO+ series is an **Active Oscillator**. It contains internal capacitors and a transistor-based amplifier circuit, meaning it only requires power to start oscillating. * **R-Suffix Significance:** In many electronic naming conventions, the **-R** suffix denotes **RoHS Compliance** (Restriction of Hazardous Substances), indicating the part is lead-free. --- ### 4. Typical Application Circuit When integrating this part, a decoupling capacitor is required near the Vdd pin to filter noise. ```cpp // Logic Diagram representation [ Power (3.3V) ] ----+---- [ Vdd (Pin 4) ] | [ 0.1uF Cap ] | [ GND ] [ Control Logic ] --------- [ E/D (Pin 1) ] [ MCU Clock In ] --------- [ OUT (Pin 3) ] [ Common Ground ] --------- [ GND (Pin 2) ] ```