12.85654

Crystals Overview

The Geyer Electronic America, Inc. part number 12.85654 is a quartz crystal resonator designed for surface-mount applications. It operates at a fundamental frequency of 27.12 MHz with a frequency tolerance of ±10 ppm. The component features a load capacitance of 10 pF and an equivalent series resistance (ESR) of 60 Ohms. It utilizes the KX-5T package type, which is characterized as a super ultra-miniature footprint suitable for space-constrained designs. The device is supplied in a 4-SMD, No Lead configuration, ensuring compatibility with automated assembly processes.

Crystals Feature Summary

• Super ultra-miniature footprint design optimized for compact electronic assemblies
• Surface-mount construction utilizing a 4-SMD no lead package format
• Quartz crystal technology providing stable frequency generation

Crystals Applications

• Hearing aids
• Earbuds
• Wireless applications

Crystals Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure the correct variant is procured. Confirm that the KX-5T package dimensions align with the target PCB layout constraints. Cross-reference the 27.12 MHz frequency requirement with the system clock specifications to guarantee operational compatibility within the intended circuit design.

Crystals Selection Notes

Select this component when a small form factor is required for portable audio or wireless devices. The 10 pF load capacitance must match the oscillator circuit requirements. Ensure the 60 Ohm ESR is acceptable for the driving circuitry. This part is suitable for applications demanding high stability in a minimal physical space.

Crystals Part Context

This component belongs to the KX-2 series of quartz crystals from Geyer Electronic. The series is engineered for super ultra-miniature applications, targeting markets such as hearing aids and earbuds. It represents a specialized line of timing devices focused on miniaturization while maintaining precise frequency control for consumer electronics.

Crystals Replacement Considerations

Consult the official Geyer Electronic catalog for direct substitutes. Verify that any alternative part matches the 27.12 MHz frequency, 10 pF load capacitance, and 4-SMD package dimensions. Ensure the replacement maintains the same ESR and tolerance specifications for circuit compatibility.