The **MHO371FCG-R** is a high-precision, surface-mount (SMD) **Crystal Oscillator** manufactured by **Mercury Electronic**. It is designed for applications requiring high stability and low power consumption in a compact form factor. --- ### 1. Key Technical Specifications The following table highlights the primary electrical characteristics of the MHO371FCG-R: | Parameter | Specification | | :--- | :--- | | **Component Type** | XO (Standard Crystal Oscillator) | | **Package Type** | 7.0 x 5.0 mm (6-pad SMD) | | **Output Type** | HCMOS / TTL | | **Supply Voltage (Vdd)** | +3.3V (Typical) | | **Frequency Range** | Typically 1.5 MHz to 156 MHz (Model dependent) | | **Frequency Stability** | ±25 ppm to ±100 ppm (Standard) | | **Operating Temp Range** | -40°C to +85°C (Industrial Grade) | | **RoHS Status** | Compliant (Lead-Free) | --- ### 2. Physical Design and Pinout The MHO series uses a ceramic seam-welded package, which provides high reliability and environmental protection. #### Pin Configuration (Standard 6-Pad) 1. **Pad 1:** Tri-state (Enable/Disable) or No Connection. 2. **Pad 2:** No Connection. 3. **Pad 3:** Ground (Case). 4. **Pad 4:** Output. 5. **Pad 5:** Complementary Output (Not used in HCMOS versions). 6. **Pad 6:** Supply Voltage (Vdd). --- ### 3. Core Functional Components Within the "MHO371" series architecture, the electronic assembly consists of three main stages: * **AT-Cut Quartz Crystal:** The primary vibrating element that provides the reference frequency. * **Oscillator IC:** An integrated circuit that provides the necessary gain to maintain oscillation and converts the signal into a logic-level square wave (HCMOS). * **Tri-state Control:** Allows the output to be placed in a high-impedance state, effectively "turning off" the signal without powering down the entire device, which is useful for power saving. --- ### 4. Application Areas Due to its robust performance and standard footprint, this part is commonly found in: * **Networking:** Ethernet switches and routers. * **Storage:** Fiber channel and SATA controllers. * **Computing:** Microprocessor clocks and embedded systems. * **Industrial:** Measurement equipment and PLC controllers. ---