The **MHO+26TAD-R** is a specific series of high-precision, high-frequency **Crystal Oscillators** (frequently associated with the MtronPTI brand). These components are critical in electronics for generating a stable clock signal required for timing in digital circuits. ### 1. General Specifications The "MHO" series typically refers to a Half-Size (14-pin DIP footprint, but usually only 4 pins are active) through-hole crystal oscillator. | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | | **Package Type** | 4-Pin DIP / Half-Size (Through-Hole) | | **Frequency Range** | Usually between 1.0 MHz and 100.0 MHz | | **Supply Voltage (Vcc)** | Typically +5.0V DC (Standard for MHO series) | | **Output Type** | TTL / HCMOS Compatible | | **RoHS Status** | The **-R** suffix indicates RoHS Compliance (Lead-free) | --- ### 2. Pin Configuration (Pinout) Though the casing resembles a 14-pin DIP integrated circuit, it utilizes a 4-pin layout for simplicity and stability. | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | NC or Tri-State | No connection or Output Enable/Disable | | **Pin 7** | GND | Circuit Ground | | **Pin 8** | Output | The generated clock frequency signal | | **Pin 14** | Vcc | Positive Power Supply (+5V) | --- ### 3. Key Electronic Characteristics * **Stability:** These oscillators are chosen for their frequency stability, often measured in parts per million (PPM), ensuring that the electronic device maintains accurate timing despite temperature changes. * **Symmetry/Duty Cycle:** Usually 40/60% to 45/55%, ensuring the "high" and "low" parts of the square wave are relatively equal. * **Rise/Fall Time:** Designed to be very fast (typically <10ns) to ensure clean transitions for high-speed digital logic. --- ### 4. Part Number Breakdown (Decoding) While codes can vary slightly by manufacturer, the MtronPTI nomenclature usually follows this logic: 1. **MHO:** Series Identifier (Metal Half-size Oscillator). 2. **+:** Often indicates a specific stability or voltage variation. 3. **26:** Often refers to a specific frequency stability (e.g., ±100ppm or ±50ppm) and operating temperature range. 4. **TAD:** Specific internal designator for output type (TTL/CMOS) and pin 1 functionality. 5. **-R:** **RoHS Compliant**. This confirms the part is manufactured without hazardous substances like lead. --- ### 5. Common Applications * **Microprocessor Clocks:** Providing the heartbeat for older 8-bit or 16-bit CPUs. * **Network Hardware:** Timing for Ethernet controllers and routers. * **Industrial Control:** Used in PLCs (Programmable Logic Controllers) where through-hole components are preferred for durability against vibration.