HC49USM-FF5F18-24.000MHZ

Crystals Overview

The ILSI HC49USM-FF5F18-24.000MHZ is a surface-mount quartz crystal unit operating at a nominal frequency of 24 MHz. It features a load capacitance of 18 pF and maintains a frequency tolerance and stability of ±30 ppm. The component utilizes an AT-cut resonator in the HC-49/US package, measuring 13.3 mm in length, 4.73 mm in width, and 4.5 mm in height. Designed for industrial reliability, it supports a wide operating temperature range from -40°C to +85°C.

Crystals Feature Summary

• Surface-mount construction within the standardized HC-49/US metal package
• AT-cut quartz resonator technology for stable oscillation
• Wide industrial temperature rating suitable for harsh environments

Crystals Applications

• Fibre Channel server and storage system clocks
• SONET/SDH network synchronization equipment
• T1/E1 and T3/E3 digital transmission systems

Crystals Procurement Notes

Verify the specific manufacturer designation on the component marking against official ILSI documentation to confirm authenticity. Ensure the ordering suffix matches the required frequency and tolerance specifications. Confirm that the surface-mount footprint aligns with the PCB design guidelines for the HC-49/US package dimensions prior to assembly.

Crystals Selection Notes

Select this component when a 24 MHz reference signal is required for high-speed serial data interfaces. The 18 pF load capacitance must match the oscillator circuit design requirements. Consider the ±30 ppm stability limit for timing accuracy needs and verify compatibility with the target application's thermal environment constraints.

Crystals Part Context

This part belongs to the HC49USM series of surface-mount crystals produced by ILSI America. The series provides cost-effective alternatives to traditional through-hole components while maintaining similar electrical performance characteristics. The HC-49/US form factor allows for automated placement during manufacturing processes.

Crystals Replacement Considerations

Cross-reference with other manufacturers offering HC-49/US SMD packages at 24 MHz with 18 pF load capacitance. Verify equivalent ESR values and aging rates to ensure circuit stability is maintained without modification.