Based on the part number provided, the **MHO+78FCD-R** refers to a high-precision, industrial-grade **Crystal Oscillator** (often integrated into clocking circuits). These components are manufactured by companies like **MtronPTI**. Below is a detailed breakdown of its electronic characteristics and specifications. --- ## 1. Technical Specifications The alphanumeric code describes specific electrical and physical traits: | Parameter | Specification Details | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Package Style** | 14-pin DIP (Dual In-line Package) - "Full Size" | | **Output Type** | CMOS / TTL Compatible | | **Voltage Supply** | Typically 5.0V (Standard for the MHO series) | | **RoHS Status** | The suffix **-R** indicates RoHS Compliance (Lead-Free) | | **Stability** | Usually ranges from ±25ppm to ±100ppm depending on exact sub-grade | --- ## 2. Pin Configuration (Internal Architecture) Though it sits in a 14-pin footprint, usually only 4 pins are electrically active: 1. **Pin 1 (NC/Tri-state):** No connection or Output Enable/Disable. 2. **Pin 7 (GND):** Case and Circuit Ground. 3. **Pin 8 (Output):** The generated frequency square wave. 4. **Pin 14 (Vcc):** Positive Power Supply (+5V). --- ## 3. Key Electronic Features ### Frequency Generation This part uses a quartz crystal slab cut at a specific angle (usually AT-cut) to provide a stable resonant frequency. This frequency is then amplified and buffered internally to provide a clean digital clock signal. ### Logic Compatibility * **CMOS/TTL:** It is designed to interface directly with microprocessors and digital logic gates (74-series or 4000-series) without needing additional level-shifting components. * **Duty Cycle:** Typically maintains a 40/60% or 45/55% symmetry, ensuring reliable timing for flip-flops and CPUs. ### Environmental Durability The **MHO+** series is known for being hermetically sealed in a metal "can." This protects the internal quartz from: * Atmospheric moisture. * Electromagnetic Interference (EMI). * Oxidation of internal contacts. --- ## 4. Common Applications * **Legacy Computing:** Providing the master clock for older CPU architectures. * **Industrial Controllers:** Timing for PLCs (Programmable Logic Controllers). * **Embedded Systems:** Base frequency generation for communication protocols (UART, SPI). * **Test Equipment:** Signal generators and frequency counters.