HC49US-FF3F18-25.000 MHZ

Crystals Overview

The HC49US-FF3F18-25.000 MHZ is a parallel fundamental mode quartz crystal manufactured by ILSI America. It operates at a nominal frequency of 25 MHz with a frequency tolerance and stability of ±30 ppm. The component utilizes an AT-cut resonator housed in a metal HC49-S package, measuring 11 mm x 4.7 mm x 3.5 mm. It supports through-hole mounting and features a load capacitance of 18 pF. The device is designed for operation within a temperature range of -20°C to +70°C and complies with RoHS standards.

Crystals Feature Summary

• AT-cut quartz resonator technology for stable oscillation
• Metal HC49-S package construction for durability
• RoHS compliant manufacturing process

Crystals Applications

• General purpose clock generation circuits
• Microcontroller system timing
• Consumer electronics oscillator modules

Crystals Procurement Notes

Verify the specific operating temperature range requirements against the datasheet, as sources indicate variations between -20°C/+70°C and -40°C/+85°C for similar series parts. Confirm that the 18 pF load capacitance matches the circuit design specifications. Ensure the through-hole mounting style aligns with the PCB layout constraints before finalizing procurement.

Crystals Selection Notes

Select this component when a standard 25 MHz reference signal is required for fundamental mode applications. The HC49-S package offers a cost-effective solution for through-hole designs. Consider the ±30 ppm tolerance for general timing needs rather than high-precision communication links. Verify compatibility with the driving circuit's power levels to ensure reliable startup.

Crystals Part Context

This part belongs to the HC49US series of quartz crystals from ILSI America. The series provides various frequency options in a standardized metal can package. These components are widely used in industrial and commercial electronics where reliable frequency control is necessary. The HC49US designation indicates a specific physical form factor compatible with common through-hole footprints.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC49S packages with identical 25 MHz frequency, 18 pF load capacitance, and ±30 ppm tolerance. Ensure the replacement maintains the same AT-cut characteristic and through-hole mounting capability. Verify that the alternative part meets the same environmental temperature ratings.