Automotive Grade Glass MHz Crystals Manufacturer

• AEC-Q200 qualified glass-sealed MHz crystals engineered for harsh automotive environments

• Seam-sealed glass packages deliver superior hermeticity and long-term frequency stability

• Compact footprints (2016/3225) meet modern ECU miniaturization demands

Ranges of Automotive Grade Glass MHz Crystals

TKD's automotive-grade MHz crystal series covers standard surface-mount footprints from 2016 to 3225, offering AT-cut fundamental and third-overtone designs with tight tolerance and wide operating temperature up to +125°C. Each package size targets specific automotive applications — from compact infotainment modules to robust powertrain ECUs.

GX-3225C

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GX-2016C

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Frequency Stability Needs for Automotive-Grade MHz Crystals

Mechanical Vibration and Shock Resilience

Vehicle environments subject crystals to continuous vibration, random mechanical shock, and thermal cycling. Glass-sealed SMD packages with robust internal mounting structures preserve crystal element integrity, minimizing frequency excursions and phase noise that could compromise CAN bus or automotive Ethernet timing under harsh road conditions.

Wide-Temperature Frequency Stability

Automotive-grade MHz crystals must maintain tight frequency stability (typically ±30 to ±50 ppm) across the full automotive temperature range (−40°C to +125°C). AT-cut angles are precisely selected to minimize frequency-temperature coefficient inflection, ensuring clock accuracy in extreme cold-start and under-hood thermal conditions.

Long-Term Aging Characteristics

AEC-Q200 qualification requires demonstrable aging performance, typically ≤±3 ppm over the first year. High-quality quartz blanks combined with clean glass sealing processes minimize contamination-driven frequency drift, sustaining system timing accuracy throughout the vehicle's service life.

Impact on Clock Tree and Communication Links

Frequency instability directly affects clock jitter, bit error rates, and synchronization margin in automotive networks. Selecting crystals with guaranteed stability windows ensures reliable data transmission across CAN-FD, LIN, and automotive Ethernet physical layers under all operating conditions.

PCB Integration and Operating Conditions for Automotive MHz Resonators

Reflow Soldering Profile Compatibility

Automotive-grade glass-sealed crystals are qualified to withstand lead-free reflow soldering peaks up to 260°C with controlled ramp rates. Proper adherence to JEDEC J-STD-020M profiles prevents thermal stress damage to the glass seal and quartz element during PCB assembly, ensuring post-solder frequency performance remains within specification.

Load Capacitance Matching and Oscillation Margin

Correct CL matching between the crystal and oscillator circuitry is critical for reliable startup and frequency accuracy. Designers should verify negative resistance margin (typically 3–5× ESR) to guarantee stable oscillation across the full voltage and temperature operating range.

Drive Level Control

Excessive drive power accelerates crystal aging and may cause frequency shifts or permanent long-term damage to the quartz resonator. Circuit designs should limit drive level to the specified maximum (typically ≤100–300 µW) and verify actual power dissipation under worst-case operating conditions through measurement or simulation.

Package Land Pattern and Decoupling

Follow manufacturer-recommended pad layouts to minimize stray capacitance and ensure mechanical stress relief. Place decoupling capacitors close to the oscillator IC supply pins, and route crystal traces away from high-speed switching signals to reduce EMI coupling and preserve signal integrity.

PCB Integration and Operating Conditions for Automotive MHz Resonators

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Automotive Grade Glass MHz Crystals | TKD

Ranges of Automotive Grade Glass MHz Crystals

GX-3225C

GX-2016C

Frequency Stability Needs for Automotive-Grade MHz Crystals

PCB Integration and Operating Conditions for Automotive MHz Resonators