The **MHO+78TAAD-R** is a high-performance **Crystal Oscillator** manufactured by MtronPTI. It belongs to the MHO+ series, which are designed for high-frequency stability and durability in industrial and commercial applications. ### 1. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Crystal Oscillator (Fixed) | | **Frequency Range** | Typically available from 1 MHz to 150 MHz | | **Supply Voltage (Vcc)** | 5.0 Volts | | **Output Type** | TTL / HCMOS Compatible | | **Package Style** | 14-pin DIP (Full Size) - 4 pins connected | | **Operating Temperature** | Standard industrial ranges (e.g., -40°C to +85°C) | | **RoHS Status** | RoHS Compliant (indicated by the -R suffix) | --- ### 2. Part Number Breakdown The alphanumeric code follows a specific nomenclature used by MtronPTI to define the component's characteristics: * **MHO+**: Series designation (High-speed CMOS/TTL compatible). * **7**: Specifies the Voltage (in this case, 5.0V). * **8**: Denotes the Frequency Stability (typically ±50ppm or ±100ppm depending on specific sub-charts). * **T**: Operating Temperature Range. * **AA**: Symmetry/Duty Cycle requirements (usually 40/60% or 45/55%). * **D**: Pinout configuration/Package (14-pin DIP through-hole). * **-R**: Indicates **RoHS Compliance** (Lead-free). --- ### 3. Pin Configuration The "D" package is a 14-pin DIP, but only 4 pins are active: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC or Tri-state | No connection or Output Enable/Disable | | **7** | GND | Circuit Ground | | **8** | Output | The generated frequency signal | | **14** | Vcc | +5.0V Power Supply | --- ### 4. Key Applications Because of its 5V operation and robust DIP packaging, this part is commonly found in: 1. **Legacy Computing:** Replacement parts for older motherboards or industrial controllers. 2. **Embedded Systems:** Providing a clock source for microprocessors and FPGAs. 3. **Communication Equipment:** Used in modems and routers requiring stable timing. 4. **Test & Measurement:** Internal clocking for oscilloscopes or signal generators. ---