HC49US-FF5F18-14.31818MHZ

Crystals Overview

The ILSI HC49US-FF5F18-14.31818MHZ is a fundamental mode quartz crystal resonator designed for surface mount applications. It operates at a nominal frequency of 14.31818 MHz with a load capacitance of 18 pF. The component features a frequency tolerance and stability of ±20 ppm and ±50 ppm, respectively. It is housed in an HC-49/US package measuring 11.5 mm in length, 5 mm in width, and 3.5 mm in height. The device supports a maximum drive level of 100 µW and has an equivalent series resistance (ESR) of 50 Ohms. It functions within a temperature range of -20°C to +70°C.

Crystals Feature Summary

• Fundamental mode quartz crystal construction
• Surface mount compatible HC-49/US package
• Low drive level operation capability

Crystals Applications

• Clock generation for microprocessors
• Timing circuits in communication equipment
• Frequency reference sources for digital systems

Crystals Procurement Notes

Verify the specific operating temperature range and frequency stability requirements against the application design specifications before procurement. Confirm that the selected variant matches the required package dimensions and mounting style. Ensure compatibility with the target circuit's drive level constraints to prevent frequency shifts or crystal damage during operation.

Crystals Selection Notes

Select this component when a surface mount solution is required for a 14.31818 MHz reference signal. Consider the ±50 ppm stability limit for applications where tighter tolerances are not critical. Evaluate the 100 µW drive level limit to ensure the oscillator circuit does not exceed power specifications. Compare physical dimensions against available PCB real estate constraints.

Crystals Part Context

This part belongs to the HC49US series of quartz crystals manufactured by ILSI America. The series offers various frequency options in a standardized surface mount footprint. These components are commonly used as timing references in consumer electronics and industrial control systems requiring stable frequency generation.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US surface mount crystals with identical 14.31818 MHz frequency, 18 pF load capacitance, and similar electrical parameters. Verify mechanical dimensions and pin compatibility before substitution.