12.88479

Crystals Overview

The Geyer Electronic America, Inc. part number 12.88479 is a ceramic surface-mount crystal oscillator designed for precision timing applications. It operates at a fundamental frequency of 20 MHz with a load capacitance of 12 pF and an equivalent series resistance of 60 Ohms. The component features a 4-SMD, no-lead package suitable for automated assembly processes. Frequency stability is specified at ±30 ppm, while the initial frequency tolerance is ±100 ppm. The device supports an operating temperature range from -40°C to +85°C, ensuring reliable performance in industrial environments.

Crystals Feature Summary

• Surface-mount ceramic construction for compact PCB integration
• Fundamental mode operation at 20 MHz
• Wide industrial temperature rating capability

Crystals Applications

• Microcontroller clock sources
• Communication interface timing circuits
• Industrial control system oscillators

Crystals Procurement Notes

Verify the specific lot date code and manufacturing origin upon receipt to ensure compliance with project requirements. Confirm that the received components match the 4-SMD no-lead package specification exactly. Check for any physical damage to the ceramic body or termination pads before soldering. Ensure storage conditions remain within recommended humidity levels to prevent degradation of the ceramic material prior to use.

Crystals Selection Notes

Select this component when a 20 MHz reference signal is required with moderate stability needs. The 12 pF load capacitance must align with the host circuit's design specifications to maintain accurate frequency output. Consider the ±100 ppm initial tolerance against system jitter requirements. The SMD form factor is appropriate for high-density board layouts where through-hole options are unavailable.

Crystals Part Context

This quartz crystal belongs to the standard SMD product line manufactured by GEYER Electronic. It serves as a passive resonator element within electronic timing circuits. The part is distinct from active oscillators, providing only the mechanical resonance necessary for circuit operation. It complements other frequency control products offered by the manufacturer for diverse application needs.

Crystals Replacement Considerations

Direct substitutes require matching 20 MHz frequency, 12 pF load capacitance, and 4-SMD no-lead packaging. Verify that alternative components meet the same ±30 ppm stability and -40 to +85°C temperature range specifications. Ensure equivalent ESR values to maintain circuit startup reliability without redesigning the load capacitors.