HC49US-FF5F18-12.000MHZ

Crystals Overview

The ILSI HC49US-FF5F18-12.000MHZ is a parallel fundamental quartz crystal operating at a nominal frequency of 12 MHz. It utilizes the HC-49/US surface mount package, measuring 11.4mm in length and 4.73mm in width. The component features a load capacitance of 18 pF and maintains a frequency tolerance and stability of ±30 ppm. Designed for industrial environments, it supports an operating temperature range from -40°C to +85°C.

Crystals Feature Summary

• Parallel fundamental AT-cut quartz construction
• HC-49/US surface mount metal sealed package
• Industrial grade wide temperature operation

Crystals Applications

• Microprocessor clock sources
• Communication equipment timing
• General purpose digital circuits

Crystals Procurement Notes

Verify that the specific part number matches the required 12 MHz frequency and 18 pF load capacitance. Confirm the HC-49/US surface mount package type aligns with the PCB footprint design. Ensure the ±30 ppm tolerance and -40°C to +85°C temperature range meet the system's operational requirements before finalizing procurement.

Crystals Selection Notes

Select this component when a standard 12 MHz reference clock is needed for surface mount designs. The HC-49/US form factor allows for direct replacement of through-hole variants without altering the board layout significantly. Consider the ±30 ppm stability sufficient for general digital logic applications requiring moderate precision.

Crystals Part Context

This crystal belongs to the HC49US series by ILSI America, which provides various frequencies within the same physical envelope. The series is characterized by its robust metal sealing and compatibility with standard surface mount reflow processes, offering a reliable solution for mass-produced electronic assemblies.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US crystals with identical 12 MHz frequency, 18 pF load capacitance, and ±30 ppm tolerance. Verify equivalent ESR values and drive level specifications to ensure circuit compatibility.