The **MHO+66TAD-R** is a specific series of high-precision crystal oscillators, typically manufactured by companies like **MtronPTI**. This component is a "Clock Oscillator" used to provide a stable frequency reference for digital circuits. --- ## 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical and physical characteristics. | Feature | Specification | | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | | **Package Style** | 14-pin DIP (Full Size) / 4-pin active | | **Logic Type** | HCMOS / TTL Compatible | | **Input Voltage** | Typically 5.0V (Standard for MHO series) | | **Stability** | Usually ±100ppm, ±50ppm, or ±25ppm (depending on suffix) | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **Output Type** | Tri-state (Enable/Disable function) | --- ## 2. Pin Configuration Although it uses a 14-pin DIP footprint, only four pins are typically functional: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | N/C or Tri-state | High = Enable; Low/Open = High Impedance | | **7** | GND | Circuit Ground | | **8** | Output | Frequency Output signal | | **14** | Vcc | Positive Supply Voltage (5.0V) | --- ## 3. Breakdown of the Part Number * **MHO:** Identifies the series (Metal, Hermetically Sealed, 5.0V). * **+:** Denotes RoHS compliance (Lead-free). * **66:** Refers to the specific frequency or stability grade (check datasheet for exact mapping). * **T:** Denotes "Tri-state" capability on Pin 1. * **A:** Operating temperature range (usually 0°C to 70°C or -40°C to 85°C). * **D:** Package style (DIP). * **R:** Tape and Reel or specific RoHS revision. --- ## 4. Key Applications * **Networking Equipment:** Used in routers and switches for clocking data packets. * **Industrial Controllers:** Providing timing for PLCs and embedded systems. * **Legacy Hardware:** Because it uses a DIP package, it is often found in older industrial computers or test equipment. ---