HC49USM-FF5F18-7.3728MHZ

Crystals Overview

The ILSI HC49USM-FF5F18-7.3728MHZ is a fundamental mode parallel resonant quartz crystal designed for surface mount applications. It operates at a nominal frequency of 7.3728 MHz with a frequency tolerance and stability of ±30 ppm. The component features an 18 pF load capacitance and a maximum series resistance (ESR) of 80 Ohms. It utilizes the standard HC-49/US metal package, measuring 13.3 mm in length and 4.7 mm in width. The device supports through-hole mounting techniques despite its SMD designation and functions within a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Fundamental mode parallel resonance operation
• HC-49/US metal enclosure construction
• AT-cut quartz element design
• RoHS compliant manufacturing

Crystals Applications

• Microcontroller clock generation circuits
• Digital communication interface timing
• General purpose oscillator circuits
• Embedded system frequency references

Crystals Procurement Notes

Verify manufacturer authenticity by checking official ILSI documentation or authorized distributor channels. Confirm package orientation and pin configuration against the specific datasheet revision. Ensure environmental compliance requirements match project specifications. Validate electrical parameters against circuit design constraints before finalizing procurement decisions.

Crystals Selection Notes

Select this component when a 7.3728 MHz reference signal is required for digital logic synchronization. The 18 pF load capacitance must align with the connected oscillator circuit design. Consider the 80 Ohm ESR limit for drive level compatibility. The HC-49/US form factor suits automated surface mount assembly processes while maintaining robust mechanical integrity.

Crystals Part Context

This part belongs to the HC49USM series of surface mount quartz crystals manufactured by ILSI America. The series provides standardized dimensions compatible with existing PCB footprints. The model suffix indicates specific electrical characteristics including load capacitance and frequency tolerance. This family targets cost-sensitive consumer and industrial electronics requiring reliable timing solutions.

Crystals Replacement Considerations

Cross-reference equivalent parts from other manufacturers using identical frequency, load capacitance, and package dimensions. Verify that substitute components meet the same ±30 ppm tolerance and 80 Ohm ESR specifications. Ensure replacement parts maintain RoHS compliance and operate within the specified temperature range.