XGHC Electronics Products

XGHC offers four main product categories: (1) Crystal Resonators - passive quartz crystals in HC-49/S and SMD packages (3225, 2520, 2016, 1612) for clock generation; (2) Crystal Oscillators - active components including SPXO, TCXO, VCXO, and OCXO with built-in oscillator circuits; (3) Automotive Grade Crystals - AEC-Q200 qualified components for automotive applications; (4) Custom Crystal Solutions - specialized frequencies and specifications for unique applications. Each category includes multiple series optimized for specific frequency ranges, stability requirements, and operating environments.

Review each product category to find the XGHC crystal component matching your frequency and accuracy requirements.

Selecting the right XGHC crystal requires considering: (1) Frequency - match your system clock requirement exactly; (2) Frequency tolerance - ±10ppm to ±50ppm depending on accuracy needs; (3) Load capacitance (CL) - match your circuit design (typically 8pF to 20pF for resonators); (4) Package type - HC-49/S for through-hole, 3225/2520/2016/1612 for SMD; (5) Operating temperature range - commercial (0°C to +70°C), industrial (-40°C to +85°C), or automotive (-40°C to +125°C); (6) Drive level - ensure sufficient but not excessive power for resonators; (7) Aging - long-term frequency drift requirements; (8) ESR - lower is better for easier oscillation. For oscillators, consider stability (ppm), output type (CMOS, LVDS, etc.), and voltage. Contact LiTong FAE for personalized crystal selection assistance.

Use our crystal selection guide or contact FAE with your frequency, accuracy, and application requirements.

Crystal resonators (quartz crystals) are passive components that require external oscillator circuitry to generate a clock signal. They offer lower cost and lower power consumption but need additional components (inverter, load capacitors, resistors). Crystal oscillators (XO, TCXO, VCXO, OCXO) are active components with built-in oscillator circuitry that output a direct clock signal. They provide better frequency stability, easier integration, and faster time-to-market but at higher cost. XGHC crystal resonators are ideal for cost-sensitive designs with available oscillator circuits. XGHC crystal oscillators are recommended for better stability, faster development, or when oscillator circuit design is not practical. TCXO offers temperature compensation, VCXO provides voltage control, and OCXO delivers highest stability with oven control.

Choose XGHC crystal resonators for cost-sensitive applications. Choose XGHC crystal oscillators for better stability and faster integration.

For automotive applications, XGHC offers AEC-Q200 qualified crystal products: (1) Automotive crystal resonators - AEC-Q200 Grade 3 qualified, -40°C to +125°C operation, tight frequency tolerance (±10ppm to ±30ppm); (2) Automotive TCXO - temperature-compensated oscillators for GPS and communication systems with ±0.5ppm to ±2.5ppm stability; (3) Automotive VCXO - voltage-controlled oscillators for clock synchronization; (4) High-reliability packaging - enhanced mechanical robustness for automotive environments. Key automotive features include enhanced temperature stability, vibration resistance, EMC compliance, and long-term supply commitment. All automotive products undergo rigorous qualification testing including 1000+ temperature cycles and mechanical stress testing. IATF 16949 certified manufacturing ensures automotive quality standards.

Contact our automotive FAE team for AEC-Q200 qualified crystal selection and qualification documentation.

XGHC offers crystal components in various package sizes: (1) HC-49/S - standard through-hole package, most cost-effective for low frequencies (3.2-100MHz); (2) HC-49/SMD - surface-mount version of HC-49 for mixed PCB designs; (3) 3225 (3.2mm x 2.5mm) - popular SMD size for general applications, widely used in industrial and consumer electronics; (4) 2520 (2.5mm x 2.0mm) - compact SMD for space-constrained designs; (5) 2016 (2.0mm x 1.6mm) - ultra-compact for portable devices; (6) 1612 (1.6mm x 1.2mm) - miniature for wearables and IoT applications. Smaller packages generally have higher ESR and tighter manufacturing tolerances. XGHC also offers specialized packages for specific applications. Choose package based on available PCB space, frequency requirements, and cost considerations.

Select package size based on PCB space constraints and frequency requirements. 3225 is most popular for general use.

XGHC crystal products cover a wide frequency range: (1) Crystal resonators - typically 3.2MHz to 100MHz in fundamental mode, up to 200MHz in 3rd overtone; (2) Standard crystal oscillators (SPXO) - 1MHz to 200MHz; (3) TCXO (Temperature Compensated) - 1MHz to 100MHz with ±0.5ppm to ±2.5ppm stability; (4) VCXO (Voltage Controlled) - 1MHz to 100MHz with pullability range; (5) OCXO (Oven Controlled) - 5MHz to 100MHz with ±10ppb to ±50ppb stability. Common standard frequencies include 32.768kHz (real-time clock), 4MHz, 8MHz, 12MHz, 16MHz, 24MHz, 25MHz, 26MHz, 27MHz, 32MHz, 48MHz, and 50MHz. XGHC maintains large inventory of standard frequencies. Custom frequencies available upon request with reasonable minimum order quantities and lead times.

Select frequency based on your system requirements. Standard frequencies offer better availability and pricing.

Load capacitance (CL) is the effective capacitance seen by the crystal in the oscillator circuit. It is critical for crystal resonators because: (1) Frequency accuracy - the crystal is calibrated to oscillate at specified frequency with specific CL; (2) Circuit matching - must match your MCU/IC's recommended CL for proper oscillation; (3) Crystal selection - choose crystal CL to match your circuit design; (4) Calculation - CL = (C1 x C2) / (C1 + C2) + Cstray, where C1 and C2 are external load capacitors and Cstray is stray capacitance (typically 3-5pF). Common CL values are 8pF, 10pF, 12pF, 16pF, 18pF, and 20pF. Using wrong CL causes frequency shift and potential oscillation issues. XGHC crystals are available in various CL values to match different circuit requirements.

Match crystal CL to your circuit design. Contact FAE for load capacitance calculation assistance.

Frequency stability indicates how much the crystal frequency varies under different conditions: (1) Temperature stability - frequency variation over operating temperature range, specified in ppm (parts per million); (2) Initial tolerance - frequency accuracy at 25°C, typically ±10ppm to ±50ppm; (3) Aging - long-term frequency drift, usually ±1-5ppm per year; (4) Supply voltage stability - variation with voltage changes (for oscillators). XGHC crystal resonators typically offer ±10ppm to ±30ppm temperature stability. XGHC TCXO provides ±0.5ppm to ±2.5ppm stability. XGHC OCXO achieves ±10ppb to ±50ppb stability. Specify stability based on your system timing accuracy requirements. GPS and communication systems need <±1ppm. Consumer electronics typically tolerate ±20-50ppm.

Specify stability based on system timing accuracy needs. Contact FAE for stability requirement analysis.