12.87135

Crystals Overview

The Geyer Electronic America, Inc. part number 12.87135 is a surface-mount tuning fork crystal designed for precise timekeeping applications. It operates at a fundamental frequency of 32.768 kHz with a specified frequency tolerance of ±20 ppm. The component features a load capacitance of 7 pF and an equivalent series resistance (ESR) of 50 kOhms. It utilizes a plastic package configuration with four flat leads in an SMD format, suitable for automated assembly processes in compact electronic devices requiring stable low-frequency references.

Crystals Feature Summary

• Tuning fork quartz crystal structure optimized for low-power timekeeping
• Surface-mount design with four flat leads for PCB integration
• Plastic encapsulation providing environmental protection

Crystals Applications

• Real-time clock circuits in consumer electronics
• Microcontroller system timing references
• Portable battery-operated devices requiring low power consumption

Crystals Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure compatibility with required tolerance and load capacitance specifications. Confirm that the component meets Class III life-support device requirements if applicable to the end application. Check for any recent updates to the manufacturing lead times or packaging standards directly from authorized distributors.

Crystals Selection Notes

Select this component when a standard 32.768 kHz reference is needed for RTC functions. Ensure the circuit design accommodates the 50 kOhm ESR and 7 pF load capacitance. Verify that the SMD footprint matches the mechanical dimensions provided in the official drawing. Consider temperature stability requirements relative to the ±20 ppm specification.

Crystals Part Context

This part belongs to Geyer Electronic America's line of frequency control products, specifically within their tuning fork crystal portfolio. The manufacturer specializes in quartz crystals, oscillators, and resonators, leveraging decades of experience in the frequency control marketplace. This specific model represents a standard industry frequency used widely in digital timekeeping applications.

Crystals Replacement Considerations

Cross-reference with other 32.768 kHz SMD tuning fork crystals from manufacturers such as Epson, NDK, or Murata. Ensure pinout compatibility and identical electrical parameters including load capacitance and ESR before substitution.