LFXTAL050789

Overview

The LFXTAL050789 is a quartz crystal resonator from the IQXC-25 series manufactured by IQD Frequency Products. It operates at a nominal frequency of 32.768 kHz with a frequency tolerance of ±20 ppm at 25°C and a maximum aging rate of +3 ppm per year. The component utilizes a surface-mount SMD package measuring 2mm x 1.2mm with two pins. It features a load capacitance of 12.5 pF and an equivalent series resistance (ESR) of 90 kOhms. Designed for base mode operation, it supports applications requiring precise low-frequency timing signals.

Feature Summary

• Compact 2mm x 1.2mm surface-mount footprint suitable for space-constrained designs
• High stability with ±20 ppm initial tolerance and limited annual aging
• Optimized for low-power real-time clock and standby power applications

Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system timing references
• Low-power embedded devices requiring standby timekeeping

Procurement Notes

Verify the specific ordering suffix to confirm packaging type, as bulk or reel options may exist. Ensure the load capacitance requirement of your circuit matches the 12.5 pF specification to maintain frequency accuracy. Confirm RoHS compliance status if required by your manufacturing standards. Cross-reference the ESR value with your oscillator circuit design to ensure proper startup conditions.

Selection Notes

Select this component when a small form factor is critical for the PCB layout. The 32.768 kHz frequency is standard for binary division to seconds. Consider the 90 kOhm ESR when designing the oscillator circuit, as higher resistance may impact start-up reliability compared to lower ESR crystals. Verify that the ±20 ppm tolerance meets the system's overall timing budget requirements.

Part Context

This part belongs to the IQXC-25 series of ultra-small quartz crystals. It serves as a fundamental timing element for digital systems requiring accurate second-based intervals. The product line focuses on miniaturization while maintaining standard frequency specifications common in portable and battery-operated electronics.

Replacement Considerations

Direct substitutes must match the 32.768 kHz frequency, 2x1.2mm package, and 12.5 pF load capacitance. Check manufacturer datasheets for identical ESR and aging characteristics to ensure circuit compatibility without redesign.