The **MHO+37FBD-R** is a high-precision, surface-mount (SMD) **Crystal Oscillator** manufactured by **Mercury Electronic**. It is specifically designed for high-frequency stability in telecommunications and high-speed data applications. --- ## 1. Core Specifications The technical characteristics of the MHO+ series are centered around low jitter and CMOS compatibility. | Parameter | Specification Details | | :--- | :--- | | **Component Type** | XO (Crystal Oscillator) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage (Vdd)** | +3.3V DC (Standard for the "3" suffix) | | **Package Size** | 7.0 x 5.0 mm (4 pads) | | **Frequency Range** | Typically 1.5 MHz to 150 MHz | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **Frequency Stability** | ±25ppm to ±100ppm (depending on sub-version) | --- ## 2. Part Number Breakdown The alphanumeric code follows a specific nomenclature used by Mercury Electronic: * **MHO+**: Series name (High stability, HCMOS/TTL output). * **3**: Represents the supply voltage (3.3V). * **7**: Represents the package size (7.0 x 5.0 mm). * **F**: Frequency stability code (often denotes ±25ppm or ±50ppm depending on datasheet revision). * **B**: Operating temperature range code (usually -40°C to +85°C). * **D**: Duty cycle requirement (typically 45/55%). * **R**: Denotes **RoHS Compliance** (Lead-free). --- ## 3. Pin Configuration The device uses a standard 4-pad layout common to SMD oscillators: 1. **Pad 1: Tri-state (Enable/Disable)** * High (or open): Output is active. * Low: Output goes into high impedance (saves power). 2. **Pad 2: Ground (GND)** * Connected to the system common ground. 3. **Pad 3: Output** * The generated clock signal (Square wave). 4. **Pad 4: Supply Voltage (Vdd)** * +3.3V power input. --- ## 4. Key Applications Because of its compact size and stable 3.3V logic, it is commonly used in: * **Networking:** Ethernet switches, routers, and fiber channel equipment. * **Computing:** High-speed microprocessors and FPGA clocking. * **Embedded Systems:** Industrial controllers requiring wide temperature tolerances. * **Storage:** SSD controllers and NAS systems.