The **MHO+61TCG-R** is a specific series designation for high-precision **Quartz Crystal Oscillators**, typically manufactured by companies like **Mercury Electronic**. These components are essential in digital circuits for providing a stable clock frequency. --- ### 1. Technical Specifications Overview The part number follows a specific nomenclature that defines its physical and electrical characteristics. | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | CMOS Crystal Clock Oscillator | | **Package Type** | 4-Pad SMD (Surface Mount Device) | | **Dimensions** | 7.0 x 5.0 x 1.8 mm (Typical for MHO series) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage (Vdd)** | Usually 3.3V or 5.0V (Variant dependent) | | **Frequency Range** | 1.0 MHz to 150 MHz | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **RoHS Status** | Compliant (Indicated by "-R") | --- ### 2. Breakdown of the Part Number While specific manufacturer codes vary slightly, the "MHO" line generally breaks down as follows: * **MHO:** Series identifier for 7x5mm metal/ceramic SMD oscillators. * **+:** Usually indicates a lead-free/RoHS compliant process. * **61:** Often refers to the supply voltage and frequency stability (e.g., 3.3V with ±50ppm or ±25ppm). * **TCG:** Internal manufacturer codes for temperature range and output symmetry. * **-R:** Denotes "RoHS Compliant" or "Tape & Reel" packaging for automated assembly. --- ### 3. Pin Configuration The MHO+ series typically utilizes a standard 4-pad layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | E/D or NC | Enable/Disable (Tri-state) or No Connection | | **2** | GND | Ground / Case Connection | | **3** | Output | The generated clock signal | | **4** | Vdd | Positive Power Supply | --- ### 4. Key Applications Because of its stability and standard footprint, the MHO+61TCG-R is found in: * **Networking:** Ethernet switches and routers. * **Embedded Systems:** Microcontroller (MCU) external clocking. * **Industrial:** PLCs and automation control boards. * **Consumer Electronics:** High-definition video equipment and storage devices. --- ### 5. Implementation Example To use this in a circuit, a 0.01µF to 0.1µF bypass capacitor should be placed as close as possible to the Vdd pin (Pin 4) and GND (Pin 2) to filter noise. ```c // Example: Conceptual Pseudocode for MCU using an external oscillator void System_Clock_Config(void) { // 1. Enable external oscillator input // 2. Set PLL multipliers based on MHO+61TCG-R frequency (e.g., 25MHz) // 3. Switch System Clock to External Source } ```