The **MHO+78TAD-R** is a specific series of high-precision crystal oscillators manufactured by **MtronPTI**. These components are widely used in telecommunications, networking, and industrial applications where stable clock signals are required. --- ### 1. Component Overview The "MHO" series typically represents **Metal Half-size Oscillators**. These are active components that generate a precise frequency signal (usually a square wave) to drive microprocessors or synchronize data transmission. ### 2. Technical Specifications Below is a breakdown of the typical characteristics for this part series: | Parameter | Specification | | :--- | :--- | | **Type** | Crystal Oscillator (XO) | | **Package** | 8-pin DIP (Half-size), Metal Can | | **Input Voltage ($V_{cc}$)** | Typically +5.0V or +3.3V | | **Output Type** | HCMOS / TTL Compatible | | **Frequency Range** | Varies (specific to the suffix, e.g., 1.0 MHz to 150 MHz) | | **Operating Temperature** | Commercial (0°C to +70°C) or Industrial (-40°C to +85°C) | | **Stability** | Generally ±25ppm to ±100ppm | --- ### 3. Part Number Decoding (Typical Mtron nomenclature) While specific internal codes can vary, the alphanumeric string generally breaks down as follows: * **MHO**: Series identifier (Metal Half-size, Through-hole). * **7**: Often denotes the voltage (e.g., 7 = 5.0V, 8 = 3.3V). * **8**: May indicate the output type or symmetry (e.g., 45/55% duty cycle). * **TAD**: Custom internal configuration or specific temperature/stability rating. * **R**: Generally stands for **RoHS Compliant** (lead-free). --- ### 4. Pin Configuration For a standard 8-pin DIP (Half-size) oscillator like the MHO series, the pinout is usually: | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | NC or Tri-state | No connection or Output Enable/Disable | | **Pin 4** | Case Ground | Connected to the metal housing for EMI shielding | | **Pin 5** | Output | The generated frequency signal | | **Pin 8** | +Vcc | Positive supply voltage | --- ### 5. Applications * **Networking:** Routers, switches, and modems. * **Industrial:** PLCs (Programmable Logic Controllers) and automation sensors. * **Legacy Systems:** Often used as a replacement part for older boards requiring through-hole components.