## Overview: MHO+27TAD-R The **MHO+27TAD-R** is a high-precision, high-frequency **VCXO (Voltage Controlled Crystal Oscillator)** manufactured by **MtronPTI**. This component is specifically designed for telecommunications and networking applications where stable timing and frequency modulation are critical. --- ### Key Specifications & Parameters The following table outlines the primary electronic characteristics of this series: | Parameter | Specification Details | | :--- | :--- | | **Output Type** | HCMOS / TTL | | **Package Style** | 14-pin DIP (DIL) - 4 pins used | | **Supply Voltage (Vcc)** | +5.0 VDC (Typical) | | **Frequency Range** | Up to 160.000 MHz (Model specific) | | **Control Voltage** | 0.5V to 4.5V | | **Pullability** | ±100 ppm (standard) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **RoHS Compliance** | Yes (R suffix indicates RoHS compliant) | --- ### Pin Configuration (Functional Description) The MHO+ series typically utilizes a standard 4-pin layout within a 14-pin DIP footprint to ensure mechanical stability and noise isolation. 1. **Pin 1: Control Voltage (Vc)** * This is the analog input used to adjust the output frequency. Changing the voltage on this pin shifts the oscillation frequency. 2. **Pin 7: Case Ground** * Connects to the system ground. The metal casing provides EMI shielding. 3. **Pin 8: Output** * Delivers the square-wave HCMOS/TTL signal to the clock tree. 4. **Pin 14: Supply Voltage (Vcc)** * The primary power input (typically +5V). --- ### Technical Features * **VCXO Functionality:** Unlike standard oscillators, the "VC" (Voltage Control) allows the system to fine-tune the frequency to synchronize with an external reference signal (Phase Locked Loop - PLL). * **Low Jitter:** Designed for high-speed data transmission, minimizing timing errors that cause bit-error rates (BER). * **Tri-state Option:** Depending on the specific sub-variant, these units often support a high-impedance state for testing or power-saving modes. * **Hermetically Sealed:** The metal package is vacuum-sealed or filled with inert gas to protect the quartz crystal from aging and moisture. --- ### Typical Applications * **SDH / SONET:** Synchronous digital hierarchy equipment. * **Digital Switching:** Core network routers and switches. * **Wireless Base Stations:** Frequency synchronization for cellular signals. * **Test & Measurement:** High-end laboratory signal generators.