12.87174

Crystals Overview

The Geyer Electronic America, Inc. model 12.87174 is a surface-mount tuning fork crystal designed for precision timekeeping applications. It operates at a nominal frequency of 32.768 kHz with a frequency tolerance of ±20 ppm. The component features a load capacitance of 7 pF and an equivalent series resistance (ESR) of 90 kOhms. It utilizes a 2-SMD, No Lead package configuration with dimensions of 1.60 mm in length and 1.00 mm in width. This device is classified as a Class III Life Supporting Device within the frequency control product line.

Crystals Feature Summary

• Tuning fork crystal structure optimized for low-power timekeeping
• Surface-mount design suitable for automated assembly processes
• High stability frequency output for accurate clock generation

Crystals Applications

• Real-time clock circuits
• Watch movement timing
• Medical device timekeeping systems

Crystals Procurement Notes

Verify that the specific order matches the exact part number 12.87174 to ensure correct frequency and package specifications. Confirm compliance with RoHS compatibility requirements if applicable to your manufacturing standards. Check current lead times as shipping delays may occur due to high order volumes. Ensure handling procedures account for its classification as a Class III Life Supporting Device.

Crystals Selection Notes

Select this component when a 32.768 kHz reference is required for digital timekeeping. The 7 pF load capacitance must match the oscillator circuit design. Consider the 90 kOhm ESR for drive level sensitivity. The small 1.60 x 1.00 mm footprint is ideal for space-constrained portable electronics. Verify that the ±20 ppm tolerance meets the system's accuracy requirements.

Crystals Part Context

This part belongs to Geyer Electronic's line of quartz crystals and oscillators, established by a manufacturer with over 50 years of experience in frequency devices. The 12.87174 is distinct from other series like the KX-4, which features different dimensions such as 1.6 mm x 1.2 mm. It serves as a passive frequency control element rather than an active oscillator.

Crystals FAQ

What is the physical package type for this crystal?

It uses a 2-SMD, No Lead package with dimensions of 1.60 mm L x 1.00 mm W.

Is this component classified for life support use?

Yes, it is designated as a Class III Life Supporting Device.