HC49US-FF5F18-25.000MHZ

Crystals Overview

The ILSI HC49US-FF5F18-25.000MHZ is a quartz crystal resonator operating at a nominal frequency of 25 MHz. It utilizes the HC-49/US surface-mount package with dimensions of approximately 13.3mm x 4.7mm. The component features a load capacitance of 18 pF and a frequency tolerance of ±30 ppm. It exhibits an equivalent series resistance (ESR) of 30 Ohms and supports a driving level of 1 mW. The device operates within a temperature range of -40°C to +85°C and is RoHS compliant.

Crystals Feature Summary

• Provides stable oscillation for digital clocking applications
• Supports surface-mount assembly via HC-49/US package
• Maintains frequency stability across industrial temperature ranges

Crystals Applications

• Microprocessor clock circuits
• Communication system timing references
• Digital logic circuit synchronization

Crystals Procurement Notes

Verify current manufacturing status as this specific part number may be obsolete or discontinued in certain regions. Confirm availability through authorized distributors or check for valid replacement part numbers if direct procurement is not possible. Ensure compliance with RoHS standards and verify package orientation during handling.

Crystals Selection Notes

Select this component when a 25 MHz surface-mount crystal with 18 pF load capacitance is required. Consider the ±30 ppm tolerance and 30 Ohm ESR specifications against circuit requirements. Verify that the HC-49/US form factor fits the PCB layout constraints and that the operating temperature range meets environmental conditions.

Crystals Part Context

This component belongs to the ILSI HC49US series of quartz crystals, designed for general-purpose timing applications. The series offers various frequencies and packaging options, with the HC-49/US variant providing a compact surface-mount solution suitable for modern electronic assemblies requiring reliable frequency generation.

Crystals Replacement Considerations

Public sources indicate this product is no longer manufactured. Consult official ILSI documentation or distributor catalogs for confirmed substitute part numbers offering identical electrical parameters and mechanical footprint.