The **MHO+44TCD-R** is a specific model of a **Quartz Crystal Oscillator**, typically manufactured by companies like **Mercury Electronic**. It belongs to the MHO+ series, which are high-stability, high-frequency timing components used in digital circuits. --- ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Specification Details | | :--- | :--- | | **Component Type** | Crystal Oscillator (SPXO - Simple Packaged Crystal Oscillator) | | **Package Type** | DIP-14 (Full size) or DIP-8 (Half size) Metal Can | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | Typically 5.0V (Standard for the MHO series) | | **Frequency Stability** | ±50ppm to ±100ppm (indicated by the '44' code) | | **Operating Temp** | -10°C to +70°C (Standard Commercial Grade) | | **RoHS Status** | The **-R** suffix indicates RoHS Compliance (Lead-free) | --- ### 2. Breakdown of the Part Number Understanding the alphanumeric code helps in identifying the exact variant: * **MHO**: Series identifier (Metal Hermetical Oscillator). * **+**: Usually denotes a specific enhancement or RoHS compatibility in the base series. * **44**: Represents the frequency stability and calibration tolerance. * **T**: Indicates the output logic type (T = TTL/CMOS). * **CD**: Specifies the duty cycle and temperature range (Standard 40/60% or 45/55%). * **R**: Confirms the part is RoHS compliant. --- ### 3. Pin Configuration (DIP-14 Style) These oscillators generally use a 4-pin layout within a 14-pin footprint: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC / ED | No Connection or Output Enable/Disable | | **7** | GND | Circuit Ground | | **8** | Output | The generated clock frequency signal | | **14** | Vcc | Power Supply (+5V) | --- ### 4. Common Applications This electronic part is used as a "heartbeat" for various digital systems that require a precise reference frequency: * **Microprocessors:** Providing the clock signal for CPU operations. * **Networking Gear:** Used in routers and switches for data synchronization. * **Industrial Controllers:** Timing for PLCs and embedded systems. * **Legacy Hardware:** Often found in older computing equipment due to the through-hole (DIP) form factor.