The **MHO+51FFG-R** is a high-precision, high-reliability **Oven Controlled Crystal Oscillator (OCXO)** manufactured by **MtronPTI**. This component is designed for timing and frequency control in environments where stability is critical. Below is a detailed breakdown of its electronic characteristics and functional parameters. --- ## 1. Technical Specifications The MHO series is known for its "Fast Warm-up" and low phase noise. The "+51FFG-R" suffix indicates specific configuration options (Frequency, Voltage, Stability, and Lead-free status). | Feature | Specification Details | | :--- | :--- | | **Component Type** | Oven Controlled Crystal Oscillator (OCXO) | | **Standard Frequency** | Typically 10.000 MHz (Common for this series) | | **Output Type** | HCMOS / TTL Compatible | | **Supply Voltage ($V_{cc}$)** | +5.0 VDC (±5%) | | **Stability vs. Temp** | High precision (often $\pm$0.1 ppm to $\pm$0.5 ppm) | | **Package Style** | Through-hole (DIP-14 or similar footprint) | | **RoHS Status** | "R" suffix denotes RoHS Compliant | --- ## 2. Key Electronic Characteristics ### A. Oven Control Mechanism Unlike a standard crystal (XO) or temperature-compensated crystal (TCXO), the **MHO+51FFG-R** contains an internal heating element and an insulated enclosure. It keeps the quartz crystal at a constant "turn-over" temperature (usually around 75°C to 85°C), effectively shielding the frequency from external ambient temperature fluctuations. ### B. Power Consumption * **Warm-up Power:** Consumes higher current (up to 500mA - 800mA) initially to reach operating temperature. * **Steady State Power:** Once at temperature, power drops significantly (usually < 250mA). ### C. Frequency Tuning (VCTCXO Capability) Many models in this series include an **Electronic Frequency Control (EFC)** pin. This allows the user to apply a small voltage (typically 0V to 5V) to fine-tune the output frequency to account for long-term crystal aging. --- ## 3. Pin Configuration (Typical) *Standard MHO Series DIP-14 Layout:* | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | **V_control** | Voltage Control for frequency tuning (EFC) | | **Pin 7** | **GND** | Case Ground | | **Pin 8** | **Output** | HCMOS/TTL Square Wave Output | | **Pin 14** | **Vcc** | +5V Power Supply | --- ## 4. Typical Applications Due to its high stability, this part is used in infrastructure-grade electronics: * **Telecommunications:** Base stations (LTE/5G) and SDH/SONET clocks. * **Test & Measurement:** Frequency counters and signal generators. * **GPS/GNSS:** Reference clocks for precision positioning. * **Data Communications:** High-speed routers and switches. --- ## 5. Summary of the Part Suffixes * **MHO:** Series Identifier (OCXO). * **+5:** 5.0V Input Voltage. * **1:** Stability Class. * **FFG:** Package and Temperature Range codes (F typically denotes -40°C to +85°C). * **-R:** RoHS compliant (Lead-free).