The **MHO+77TBD-R** is a specific part number typically associated with **Quartz Crystal Oscillators**, often manufactured by companies like MtronPTI. These components are used to provide precise timing signals for electronic circuits. --- ### 1. Technical Specifications Table The part number follows a specific nomenclature that defines its electrical and physical characteristics. | Parameter | Specification (General Reference) | | :--- | :--- | | **Component Type** | Crystal Clock Oscillator | | **Package Style** | 14-pin DIP (Full size) or 8-pin DIP (Half size) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage ($V_{cc}$)** | Typically 5.0V (Standard for MHO series) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Frequency Stability** | ±100 ppm (Typical for this series) | | **RoHS Status** | Compliant (Indicated by the "R" suffix) | --- ### 2. Breakdown of the Part Number To understand the electronic capabilities, we can break down the code: * **MHO:** Identifies the product series (Metal package, High reliability, 5.0V operation). * **7:** Represents the frequency stability and temperature range (commonly $\pm$100ppm over -40 to +85°C). * **7:** Indicates the Duty Cycle (typically 40/60% or 45/55%). * **TBD:** This is often a placeholder in documentation for the specific **Frequency** (e.g., 20.000 MHz). In a finished part, this would be replaced by numerical values. * **-R:** Indicates **RoHS Compliance** (Lead-free). --- ### 3. Key Electronic Functions * **Frequency Generation:** It uses a vibrating quartz crystal to create a steady electrical signal (square wave). * **Tri-state Functionality:** Many models in this series feature a "Tri-state" or "Output Enable" pin, allowing the output to be disconnected electronically without powering down the device. * **Hermetic Sealing:** The "M" in MHO stands for a metal package that is resistance-welded to protect the internal crystal from moisture and atmospheric interference. ### 4. Common Applications * **Microprocessors:** Providing the "heartbeat" for CPUs. * **Networking:** Timing for Ethernet or Fibre Channel equipment. * **Industrial Control:** Providing stable clocks in high-temperature environments.