The **MHO+68FBD-R** is a high-precision, high-frequency **TCXO (Temperature Compensated Crystal Oscillator)** manufactured by **MtronPTI**. This component is specifically designed for telecommunications and networking hardware where timing stability is critical. --- ## 1. Technical Specifications The following table summarizes the primary electrical and physical characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Component Type** | TCXO (Temperature Compensated Crystal Oscillator) | | **Package Type** | 5x7 mm Surface Mount (SMD) | | **Output Type** | HCMOS / TTL | | **Standard Frequency** | Typically 38.88 MHz or 77.76 MHz (Varies by sub-code) | | **Supply Voltage (Vcc)** | 3.3V (Standard for "B" series) | | **Stability** | ±1.0 ppm to ±2.5 ppm | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **RoHS Status** | Compliant (Lead-Free) | --- ## 2. Key Features * **Temperature Compensation:** Unlike standard crystals, this part includes internal circuitry that adjusts the frequency based on ambient temperature, ensuring the clock signal remains stable. * **Low Phase Noise:** Designed to minimize jitter, which is essential for high-speed data transmission. * **Tri-state Function:** Includes an enable/disable pin (Pin 1) that allows the output to go into a high-impedance state, saving power when the clock is not needed. * **Hermetically Sealed:** The 5x7mm ceramic package protects the quartz crystal from atmospheric moisture and pressure changes. --- ## 3. Pin Configuration (Typical 6-Pad Layout) | Pin # | Function | Description | | :--- | :--- | :--- | | **1** | E/D or Vc | Enable/Disable or Voltage Control (depending on specific variant) | | **2** | N/C | No Connection | | **3** | GND | Circuit Ground | | **4** | Output | HCMOS Clock Signal Output | | **5** | N/C | No Connection | | **6** | Vcc | Supply Voltage (3.3V) | --- ## 4. Common Applications Due to its high stability and industrial temperature rating, the MHO+68FBD-R is commonly found in: 1. **SONET / SDH / ATM** telecommunication equipment. 2. **Wireless Base Stations** (Cellular infrastructure). 3. **Ethernet Switches and Routers** for network synchronization. 4. **Smart Grid** infrastructure and industrial IoT gateways.