The **MHO356FAD-R** is a high-performance, surface-mount (SMD) **Crystal Oscillator** (XO). It is primarily used in industrial and telecommunications equipment to provide a stable clock signal for digital circuits. --- ## 1. Technical Specifications Below are the primary technical parameters for the MHO356FAD-R series: | Parameter | Specification | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Output Type** | HCMOS / TTL | | **Supply Voltage ($V_{DD}$)** | 5.0V (Standard for "35" series) | | **Frequency Range** | Typically 1.5 MHz to 80.0 MHz | | **Frequency Stability** | $\pm$25ppm to $\pm$100ppm | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Package Style** | 14-pin DIP compatible (Half-size) or SMD | | **Mounting Type** | Surface Mount / Through-Hole variants | --- ## 2. Key Features and Functions The "MHO" series from manufacturers like MtronPTI or similar high-reliability vendors features specific design characteristics: ### A. Tri-state Functionality The "F" in the part number often indicates **Tri-state** (Output Enable/Disable) capability. This allows the oscillator to be disconnected from the bus logically, reducing power consumption when the clock is not required. ### B. Thermal Stability The "R" suffix typically denotes **RoHS Compliance**, meaning the part is lead-free and meets international environmental safety standards. ### C. Waveform Characteristics * **Duty Cycle:** Usually 40/60% or 45/55%. * **Rise/Fall Time:** Optimized for high-speed digital logic to prevent "jitter" or timing errors in microprocessors. --- ## 3. Pin Configuration For the standard 4-pin SMD or 14-pin (half-size) layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | E/D (Enable/Disable) | High = Output active; Low/Open = High Impedance | | **2** | GND | Ground connection | | **3** | Output | The generated clock signal | | **4** | $V_{DD}$ | Supply voltage (5.0V) | --- ## 4. Common Applications * **Networking:** Routers, switches, and modems. * **Industrial:** Programmable Logic Controllers (PLCs) and automated machinery. * **Embedded Systems:** Providing the master clock for 8-bit or 16-bit Microcontrollers. ---