HC49US-FF3F18-7.3728MHZ

Crystals Overview

The ILSI HC49US-FF3F18-7.3728MHZ is a parallel fundamental quartz crystal resonator designed for surface mount applications within the HC-49/US package. It operates at a nominal frequency of 7.3728 MHz with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 80 Ohms. The component exhibits a frequency tolerance and stability of ±30 ppm, supporting a drive level of 1 mW. It functions reliably across a temperature range of -40°C to +85°C.

Crystals Feature Summary

• AT-cut quartz construction ensures long-term aging stability
• Surface mount design facilitates automated PCB assembly
• RoHS compliant manufacturing process

Crystals Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing circuits

Crystals Procurement Notes

Verify that the specific suffix matches the required operating temperature range and mounting style. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure circuit design accommodates the specified 80 Ohm ESR and 1 mW maximum drive level to prevent frequency deviation or component damage during operation.

Crystals Selection Notes

Select this component when a standard HC-49/US footprint is required for surface mount technology. The 18 pF load capacitance must align with the oscillator circuit's external capacitors. Consider the ±30 ppm tolerance against system timing requirements. Verify that the 7.3728 MHz frequency meets the target application's baud rate or clock division needs without additional dividers.

Crystals Part Context

This part belongs to the HC49USM series of metal package quartz crystals manufactured by ILSI America. These components are widely used in consumer electronics and industrial control systems requiring precise timing references. The HC-49/US form factor provides mechanical robustness while maintaining compatibility with standard reflow soldering profiles.

Crystals Replacement Considerations

Cross-reference with other manufacturers offering HC-49/US SMD crystals with identical 7.3728 MHz frequency, 18 pF load capacitance, and 80 Ohm ESR specifications.