HC49U/N-R 8.000000

Overview

The HC49U/N-R 8.000000 is a surface-mount parallel fundamental quartz crystal resonator manufactured by MtronPTI. It operates at a nominal frequency of 8 MHz with a tolerance of ±30 ppm and a load capacitance of 18 pF. The component utilizes an AT-cut design housed in an HC-49 gull-wing package, featuring a series resistance of 40 Ohms and a drive level of 100 µW. It supports a temperature range from -20 °C to +70 °C.

Feature Summary

• Surface-mount construction utilizing the HC-49 gull-wing package for automated assembly compatibility
• Parallel fundamental resonance mode based on AT-cut quartz technology
• Designed for stable clock generation within specified electrical limits

Applications

• Microprocessor clock signal generation
• Communication interface timing circuits
• Digital logic circuit synchronization

Procurement Notes

Verify that the specific order matches the HC49U/N-R suffix configuration to ensure correct gull-wing termination style. Confirm the 8.000000 frequency designation aligns with system requirements. Check RoHS compliance status if restricted substances are mandated. Ensure the 18 pF load capacitance matches the oscillator circuit design parameters before finalizing procurement.

Selection Notes

Select this component when a surface-mount solution is required for 8 MHz applications. The HC-49 form factor offers robust mechanical stability compared to smaller packages. Verify that the 40 Ohm series resistance fits the driving capability of the target oscillator IC. Consider the ±30 ppm tolerance against system jitter requirements.

Part Context

This part belongs to the HC-49 family of surface-mount crystals produced by MtronPTI. It shares the physical dimensions and mounting style with other variants in the series but differs in frequency and electrical characteristics. The HC-49UN designation indicates the specific gull-wing lead configuration suitable for reflow soldering processes.

Replacement Considerations

Direct substitutes include other HC-49 SMD crystals with identical 8 MHz frequency, 18 pF load capacitance, and compatible ESR values. Cross-reference pinout compatibility and thermal specifications to ensure equivalent performance in the existing footprint.