The **MHO368TAD-R** is a high-performance, differential output crystal oscillator (XO) designed primarily for high-speed networking and telecommunications equipment. It belongs to the MHO series manufactured by suppliers like **MtronPTI**. --- ## 1. Core Technical Specifications The following table outlines the typical electrical characteristics for this component: | Feature | Specification | | :--- | :--- | | **Output Type** | LVDS (Low-Voltage Differential Signaling) | | **Frequency Range** | Typically fixed (e.g., 156.25 MHz or 622.08 MHz) | | **Supply Voltage ($V_{cc}$)** | 3.3V DC (standard) | | **Package Size** | 5.0 x 7.0 mm (6-pad SMD) | | **Frequency Stability** | ±20ppm to ±50ppm (varies by sub-model) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Phase Jitter** | Low Jitter (<1ps RMS) | --- ## 2. Key Electronic Features ### Differential Signaling (LVDS) The "TAD" designation usually indicates an **LVDS output**. Unlike CMOS signals that swing from rail to rail, LVDS uses a small differential voltage (~350mV). This provides: * **High Noise Immunity:** Since the signals are differential, common-mode noise is rejected. * **Low EMI:** The opposing electromagnetic fields cancel each other out. * **High Speed:** Faster switching times than traditional single-ended oscillators. ### Tri-State Enable/Disable The device includes an "Enable/Disable" function (usually on Pin 1). * **High (or floating):** The oscillator output is active. * **Low:** The output enters a high-impedance state, reducing power consumption. ### Frequency Stability The "-R" suffix often denotes **RoHS Compliance**, ensuring the part is lead-free. The internal circuitry utilizes a precision-cut quartz crystal and a specialized IC to maintain a stable frequency over a wide temperature range. --- ## 3. Pin Configuration (Typical 6-Pad SMD) | Pin # | Function | Description | | :---: | :--- | :--- | | **1** | E/D or NC | Enable/Disable Control | | **2** | NC | No Connection | | **3** | GND | Ground | | **4** | Output | Positive Differential Output | | **5** | Complementary Output | Negative Differential Output | | **6** | $V_{cc}$ | Supply Voltage | --- ## 4. Common Applications Due to its low jitter and high-frequency stability, the MHO368TAD-R is commonly found in: * **Fiber Optic Modules:** SFP+, XFP, and QSFP transceivers. * **Networking:** Gigabit Ethernet switches and high-end routers. * **Storage:** Fibre Channel and SAS/SATA interfaces. * **Backplane Clocks:** Distributing clean clock signals across large PCB systems.