The **MH14FCD-R** is a specific model of a **Crystal Oscillator**, typically used in electronic circuits to provide a precise and stable clock signal. These components are essential for the synchronization of data processing in microcontrollers and digital systems. --- ### 1. Key Technical Specifications Based on standard industry naming conventions for the MH series (often manufactured by companies like MtronPTI), the specifications generally include: | Feature | Description | | :--- | :--- | | **Component Type** | XO (Clock Oscillator) | | **Package Style** | 14-pin DIP (Dual In-line Package) or Half-size DIP | | **Frequency Range** | Typically 1.0 MHz to 100.0 MHz (depends on specific sub-code) | | **Output Logic** | CMOS / TTL Compatible | | **Supply Voltage** | Usually 5.0V (Standard) or 3.3V | | **Stability** | ±100ppm, ±50ppm, or ±25ppm (Standard commercial grade) | --- ### 2. Physical Characteristics The "14" in the part number often refers to the **14-pin DIP footprint**, although in modern oscillators, only 4 pins are actually present: * **Pin 1:** NC (No Connection) or Tri-state Control. * **Pin 7:** Ground (GND). * **Pin 8:** Output Signal. * **Pin 14:** Supply Voltage ($V_{cc}$). --- ### 3. Part Number Breakdown While manufacturer codes vary slightly, the suffix "R" often denotes specific environmental or packaging compliance: * **MH:** Series prefix (Metal Hermetic package). * **14:** Package size/form factor (Full-size 14-pin DIP footprint). * **F:** Usually indicates the stability or temperature range (e.g., $0^\circ C$ to $+70^\circ C$). * **CD:** Often refers to the duty cycle (e.g., 40/60% symmetry). * **-R:** Generally indicates **RoHS Compliance** (Lead-free). --- ### 4. Common Applications These oscillators are found in legacy and industrial equipment due to their robust metal casing and through-hole design: 1. **Industrial Controllers:** Providing the master clock for PLCs. 2. **Embedded Systems:** Used with older 8-bit or 16-bit microprocessors. 3. **Communication Gear:** Timing for serial data transmission. 4. **Test Equipment:** Stable frequency reference for signal generators. ---