HC49USM-FF5F18-8.000MHZ

Crystals Overview

The ILSI HC49USM-FF5F18-8.000MHZ is a surface-mount parallel fundamental quartz crystal operating at a nominal frequency of 8 MHz. It features a frequency tolerance and stability of ±30 ppm across an operating temperature range of -40°C to +85°C. The component utilizes an 18 pF load capacitance and exhibits an equivalent series resistance (ESR) of 80 Ohms. Housed in the HC-49/US package with dimensions of 13.3mm x 4.7mm, it supports a maximum drive level of 1 mW.

Crystals Feature Summary

• Surface-mount construction within the standard HC-49/US metal package
• Parallel fundamental resonance mode for stable oscillation
• AT-cut quartz design ensuring low aging characteristics
• Lead-free processing compatibility and RoHS compliance

Crystals Applications

• General-purpose clock generation circuits
• Microcontroller oscillator interfaces
• Communication system timing references
• Industrial control board synchronization

Crystals Procurement Notes

Verify the specific suffix FF5F18 corresponds to the required 18pF load capacitance and ±30ppm stability specifications. Confirm that the SMD variant matches the target PCB footprint requirements. Ensure the operating temperature range of -40°C to +85°C aligns with the environmental conditions of the final assembly. Cross-reference the ESR value of 80 Ohms against the oscillator circuit design constraints.

Crystals Selection Notes

Select this component when a surface-mount solution is preferred over through-hole mounting for space-constrained designs. The HC-49/US form factor provides mechanical robustness comparable to traditional packages while enabling automated placement. Choose this part if the application requires a balance between cost-effectiveness and moderate frequency stability standards typical for general digital logic timing.

Crystals Part Context

This model belongs to the ILSI HC49USM series, which offers various frequency options within the same physical envelope. The 'M' suffix typically denotes the surface-mount configuration, distinguishing it from the through-hole HC49U variants. This series is widely used in consumer electronics and industrial equipment requiring reliable, low-cost timing sources.

Crystals Replacement Considerations

Compatible substitutes include other manufacturers' HC-49/US 8MHz crystals with matching 18pF load capacitance and ±30ppm tolerance. Verify pin compatibility and physical dimensions before substitution. Equivalent parts must support the same drive level and temperature range to ensure circuit performance integrity.