HC49US-FF5F18-20.000MHZ

Crystals Overview

The ILSI HC49US-FF5F18-20.000MHZ is a through-hole quartz crystal resonator operating at a fundamental frequency of 20 MHz. It features a standard HC-49/US metal package with dimensions of approximately 11.40 mm in length and 4.73 mm in width. The component provides a frequency tolerance and stability of ±30 ppm at 25°C, with an operating temperature range extending from -40°C to +85°C. It utilizes a load capacitance of 18 pF and is designed for base mode operation.

Crystals Feature Summary

• Standard HC-49/US metal case construction
• Through-hole mounting configuration
• Wide industrial temperature rating

Crystals Applications

• General purpose clock generation circuits
• Microcontroller oscillator inputs
• Communication interface timing references

Crystals Procurement Notes

Verify the specific suffix FF5F18 against the manufacturer's current part number guide to ensure compatibility with required load capacitance and aging specifications. Confirm that the HC-49/US through-hole form factor aligns with the target PCB footprint and assembly process requirements before finalizing procurement orders.

Crystals Selection Notes

Select this component when a robust metal-can through-hole crystal is required for 20 MHz applications. Ensure the circuit design supports an 18 pF load capacitance to maintain the specified ±30 ppm accuracy. Consider thermal management if the operating environment approaches the upper limit of the -40°C to +85°C range.

Crystals Part Context

This model belongs to the HC49US series of quartz crystals manufactured by ILSI America. The series offers various frequencies within the standard range, utilizing the widely adopted HC-49/US package. This specific variant targets general electronic applications requiring stable timing signals with moderate precision.

Crystals Replacement Considerations

Compatible substitutes include other manufacturers' HC-49/US crystals rated at 20 MHz with ±30 ppm tolerance and 18 pF load capacitance. Verify mechanical lead spacing and electrical parameters match exactly before substitution.