The **SQXO2ATHG** is a high-performance, high-stability crystal oscillator manufactured by **Statek Corporation**. It belongs to a specialized class of components designed for high-temperature and high-shock environments, typically used in aerospace, down-hole drilling, and defense electronics. --- ## 1. Technical Specifications The following table outlines the core electronic and physical characteristics of the SQXO2ATHG series: | Parameter | Specification | | :--- | :--- | | **Frequency Range** | 32.768 kHz to 50 MHz (common) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | 3.3V to 5.0V (Standard) | | **Operating Temp** | -55°C to +200°C (Extended range versions) | | **Shock Resistance** | Up to 100,000 g | | **Package Type** | Surface Mount (SMD) Ceramic | | **Stability** | ±100 ppm to ±25 ppm depending on grade | --- ## 2. Key Electronic Components & Features ### A. The Quartz Crystal (The Resonator) The "SQ" in the name stands for **Statek Quartz**. The heart of this part is a micro-machined, high-Q quartz resonator. Statek uses photolithographic processes (similar to chip manufacturing) to create precise tuning fork or AT-cut crystals that provide superior aging characteristics. ### B. The Integrated Circuit (ASIC) Inside the ceramic package, the quartz crystal is paired with a CMOS integrated circuit. This circuit performs two main functions: 1. **Oscillation Driver:** Maintains the mechanical vibration of the crystal. 2. **Output Buffer:** Ensures the signal is clean and can drive other electronic loads (TTL/CMOS) without degrading the frequency stability. ### C. Hermetic Ceramic Packaging The component is housed in a hermetically sealed ceramic package with a gold-plated lid. This protects the delicate internal electronics from moisture, corrosive gases, and pressure changes common in industrial or space applications. --- ## 3. Application Use Cases Because of its extreme durability, the SQXO2ATHG is not found in consumer electronics (like phones), but rather in: * **Down-hole Drilling:** Monitoring tools that must survive temperatures exceeding 150°C and intense vibration. * **Aerospace & Avionics:** Flight control systems where vacuum-level reliability is required. * **Military Systems:** Smart munitions or communication gear subjected to high launch shocks. --- ## 4. Part Number Breakdown (Typical) While specific suffixes may vary, the naming convention generally follows: * **SQXO:** Statek Quartz Crystal Oscillator. * **2:** Designates the specific package size or generation. * **AT:** Refers to the "AT-cut" crystal, which provides better temperature stability compared to standard tuning forks. * **HG:** Stands for **High-G**, indicating it is reinforced for high shock/vibration environments.