The **MHO+47TAG-R** refers to a high-precision, oven-controlled or temperature-compensated crystal oscillator (part of the MHO series, typically manufactured by companies like MtronPTI). These components are critical for frequency control in telecommunications and industrial applications. --- ## 1. Component Overview The MHO series is generally categorized as a **Metal Can Crystal Oscillator**. These are designed for high reliability and stable frequency output over a wide temperature range. ### Key Technical Specifications | Feature | Typical Specification | | :--- | :--- | | **Package Type** | 14-pin DIP (Full size) or 8-pin DIP (Half size) Metal Can | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | Usually 3.3V or 5.0V | | **Frequency Range** | Varies (Specified by the "47" or specific marking) | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **RoHS Status** | Compliant (Indicated by the **-R** suffix) | --- ## 2. Breakdown of the Part Number While specific manufacturer codes vary slightly, the nomenclature generally follows this logic: 1. **MHO**: The Series prefix, indicating a Metal Clock Oscillator in a through-hole package. 2. **+**: Often indicates a specific voltage or lead-free process improvement. 3. **47**: This is usually a frequency or stability code. In many crystal naming conventions, this refers to a stability of **±50ppm** or a specific frequency center. 4. **TAG**: This is a sub-code for the specific internal crystal cut or temperature compensation profile. 5. **-R**: Strictly denotes **RoHS Compliance** (Lead-free). --- ## 3. Pin Configuration (Standard 14-pin DIP) Even though it has 14 pins, most are omitted, leaving 4 active pins: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC / Tri-State | No connection or Output Enable/Disable | | **7** | GND | Circuit and Case Ground | | **8** | Output | The generated clock signal (Square Wave) | | **14** | Vcc | Power Supply Input | --- ## 4. Typical Applications * **Networking**: Providing the "heartbeat" for Ethernet switches and routers. * **Industrial Controllers**: Timing for PLCs and embedded microprocessors. * **Data Communications**: Ensuring synchronized data transfer between hardware interfaces. * **Legacy Hardware**: Used in older computing systems requiring through-hole clock sources. --- ## 5. Circuit Integration Example To use this part, a bypass capacitor is required between Vcc and GND to filter noise. ```cpp // Logic Representation of Clock Usage void setup() { // The MHO+47TAG-R provides a hardware clock // No software initialization is needed for the crystal itself; // it begins oscillating as soon as 3.3V/5V is applied. } ```