LFXTAL016178

Overview

The LFXTAL016178 is a surface-mount quartz crystal unit designed for real-time clock applications. It operates at a nominal frequency of 32.768 kHz with a standard load capacitance of 6 pF. The component features a frequency tolerance of ±20 ppm and an annual aging rate of ±5 ppm at 25°C. It utilizes a four-terminal SMD package measuring 8.7 mm in length, 3.7 mm in width, and 2.5 mm in height. The maximum series resistance (ESR) is specified at 50 kΩ, and the maximum drive level is 1 μW. The device supports a storage temperature range of -55°C to 125°C and complies with RoHS 2015 and REACH standards.

Feature Summary

• Four-terminal surface mount construction provides enhanced stability against mechanical shock and vibration compared to two-terminal designs.
• Low drive level specification of 1 μW ensures minimal power consumption, making it suitable for battery-backed RTC circuits.
• Industrial-grade environmental tolerance allows reliable operation across wide temperature variations without frequency drift.

Applications

• Real-time clock oscillators in consumer electronics
• Battery-powered embedded systems requiring low standby current
• Industrial gateways and outdoor equipment with harsh environmental conditions

Procurement Notes

Verify that the target microcontroller's RTC peripheral matches the 6 pF load capacitance requirement to avoid frequency mismatch. Confirm that the manufacturing process does not involve ultrasonic cleaning, as this may damage the internal crystal structure. Ensure compliance with RoHS 2015 and REACH regulations if exporting to restricted regions. Check datasheet specifications for maximum ESR limits to guarantee start-up reliability in cold temperatures.

Selection Notes

Select this component when designing for standard 32.768 kHz RTC frequencies without requiring custom divider adjustments. Prioritize this part over two-terminal crystals if the application demands higher resistance to physical stress or vibration. Consider the ±5 ppm/year aging rate for long-term accuracy requirements where cumulative error must remain within tight limits over multiple years of operation.

Part Context

This crystal belongs to IQD Frequency Products' standard surface-mount quartz line, utilizing an industry-standard footprint compatible with common PCB design libraries. It serves as a direct replacement for legacy through-hole or two-terminal SMD crystals in timekeeping applications, offering improved mechanical robustness while maintaining electrical compatibility with standard RTC interfaces.

Replacement Considerations

The Wurth Elektronik part number 830016178 is documented as a corresponding alternative with identical electrical characteristics and form factor.