The **MHO361TAG-R** is a high-performance, differential output Crystal Oscillator (XO). It is commonly utilized in high-speed networking, telecommunications, and server applications where timing precision and low jitter are critical. --- ### 1. Key Technical Specifications Below is a breakdown of the primary electrical characteristics typically associated with this series: | Parameter | Specification Details | | :--- | :--- | | **Component Type** | Quartz Crystal Oscillator (Fixed Frequency) | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Standard Frequency** | Often 156.25 MHz (Common for Ethernet/Fiber Channel) | | **Supply Voltage (Vcc)** | 3.3V (Typical) | | **Frequency Stability** | ±25ppm to ±50ppm (varies by sub-grade) | | **Package Size** | 5.0mm x 7.0mm (6-Pad SMD) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | --- ### 2. Electronic Architecture The MHO361TAG-R consists of several internal functional blocks integrated into a single surface-mount package: 1. **Quartz Crystal Resonator:** The heart of the part, providing the fundamental physical vibration. 2. **Oscillator IC:** An ASIC that maintains the oscillation of the crystal and handles frequency multiplication if necessary. 3. **Differential Output Buffer:** Converts the internal signal into an **LVPECL** format. This differential signaling is essential for: * Reducing electromagnetic interference (EMI). * Providing high noise immunity over long PCB traces. * Supporting high-frequency data rates. --- ### 3. Pin Configuration (Typical 6-Pad SMD) | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | Enable/Disable (OE) | High = Output active; Low = High impedance | | **2** | No Connect (NC) | Often left floating or used for factory testing | | **3** | Ground (GND) | Circuit ground | | **4** | Output (Q) | Positive LVPECL output | | **5** | Complementary Output (/Q) | Inverted LVPECL output | | **6** | Supply Voltage (Vcc) | Power input (usually 3.3V) | --- ### 4. Application Use Cases Because of its LVPECL output and high stability, this part is found in: * **Gigabit Ethernet:** Specifically 10GbE and 40GbE systems. * **Fiber Channel:** Storage area networks. * **SONET/SDH:** Optical transmission equipment. * **FPGA Clocking:** Providing the reference clock for high-speed SerDes (Serializer/Deserializer) transceivers.