12.87131

Crystals Overview

The Geyer Electronic America, Inc. part number 12.87131 is a quartz crystal resonator operating at a nominal frequency of 32.768 kHz. It utilizes a tuning fork configuration housed in a surface-mount package with four flat leads. The component features a load capacitance of 12.5 pF and an equivalent series resistance of 50 kOhms. Frequency tolerance is specified at ±20 ppm, with stability reaching -0.03 ppm. The device operates within a temperature range of -40°C to +85°C and has a maximum seated height of 0.055 inches.

Crystals Feature Summary

• Super ultra-miniature footprint designed for space-constrained applications
• Surface-mount construction with four flat leads for reliable attachment
• High-precision tuning fork resonator architecture

Crystals Applications

• Hearing aids
• Earbuds
• Wireless applications

Crystals Procurement Notes

Verify the specific datasheet version when ordering, as distributor listings may contain conflicting specifications regarding frequency or package dimensions. Confirm that the required load capacitance matches the target circuit design. Ensure the operating temperature range meets the environmental requirements of the end application. Cross-reference the manufacturer's standard lead time with project schedules to avoid delays.

Crystals Selection Notes

Select this component for designs requiring precise low-frequency timing in compact form factors. The 32.768 kHz frequency is standard for real-time clock generation. Evaluate the 50 kOhm ESR against oscillator circuit drive levels to ensure proper startup. Consider the 7.00mm x 1.50mm package size during PCB layout planning to maintain adequate clearance for adjacent components.

Crystals Part Context

This part belongs to the KX-2 series of quartz crystals from Geyer Electronic. The series focuses on super ultra-miniature footprints tailored for portable electronics. These components support accurate clock generation and stable synchronization in consumer devices where physical space is limited.

Crystals Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing oscillator circuits before considering alternative sources.