The **MHO+18TCD-R** is a specific model within the series of high-precision quartz crystal oscillators. These components are essential in electronics for providing a stable clock signal or frequency reference. --- ### 1. Component Overview The "MHO" series typically refers to **Crystal Clock Oscillators** in a specific package size (often a 14-pin DIP compatible footprint). These are "active" components, meaning they require a power supply to generate an oscillating signal, unlike "passive" crystals which require external load capacitors and an IC inverter. ### 2. Technical Specifications While specific datasheets can vary by manufacturer (often associated with brands like MtronPTI), the nomenclature usually breaks down as follows: | Parameter | Specification (Typical) | | :--- | :--- | | **Package Type** | 14-pin DIP (Rectangular metal can) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | Usually 5.0V or 3.3V DC | | **Frequency Range** | 1.0 MHz to 100+ MHz (Varies by sub-model) | | **Operating Temp** | -10°C to +70°C (Standard) or -40°C to +85°C (Industrial) | | **Stability** | ±25ppm, ±50ppm, or ±100ppm | ### 3. Key Electronic Characteristics * **Active Oscillation:** It contains an internal quartz blank and an oscillation circuit integrated into a single hermetically sealed metal package. * **Tri-State Functionality:** The "T" in many codes indicates a "Tri-state" or "Enable/Disable" function. This allows the output to be disconnected (high impedance) to save power or allow multiple devices to share a bus. * **Low Jitter:** Designed for timing-sensitive applications where "noise" in the frequency must be minimized. * **Through-Hole Mounting:** The physical pins are designed to be soldered into holes on a Printed Circuit Board (PCB), making it robust for industrial environments. ### 4. Pin Configuration (Typical 14-Pin DIP Package) Although it has a 14-pin footprint, only 4 pins are usually active: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC / E/D | No Connect or Enable/Disable (Tri-state) | | **7** | GND | Case and Circuit Ground | | **8** | Output | The generated clock signal (Square wave) | | **14** | Vcc | Positive Power Supply | --- ### 5. Common Applications * **Microprocessors:** Providing the main heartbeat for CPUs. * **Networking:** Syncing data transmission in Ethernet or Fiber devices. * **Industrial Control:** Ensuring precise timing for PLCs and automated machinery. * **Legacy Systems:** Often used in older hardware or specialized medical equipment due to the stable 14-pin DIP form factor.