HC49USM-FF3F18-3.6864MHZ

Crystals Overview

The HC49USM-FF3F18-3.6864MHZ is a surface-mount quartz crystal from the HC49US series manufactured by ILSI America. It operates at a nominal frequency of 3.6864 MHz with a load capacitance of 18 pF. The component provides a frequency tolerance and stability of ±30 ppm. It features an equivalent series resistance (ESR) of 60 ohms maximum. The package dimensions are approximately 12.5 mm in length and 4.8 mm in width, designed for lead-free processing compatibility.

Crystals Feature Summary

• SMD Package Compatible with Leadfree Processing
• Grounded Package for Low EMI

Crystals Applications

• Fibre Channel Server & Storage
• Sonet /SDH
• 802.11 / Wifi
• T1/E1, T3/E3 System Clock

Crystals Procurement Notes

Verify the specific manufacturer designation on the datasheet, as distributor listings may attribute this part to ABRACON or ILSI America due to cross-manufacturing agreements. Confirm that the suffix 'FF' corresponds to the required 18 pF load capacitance and ±30 ppm tolerance specifications for your circuit design before finalizing procurement orders.

Crystals Selection Notes

Select this component when a standard 3.6864 MHz reference is required for surface-mount assembly. Ensure the application supports the 60 ohm ESR limit. Verify that the operating temperature range aligns with the standard industrial specifications provided in the official documentation for the HC49USM series.

Crystals Part Context

This component belongs to the HC49USM series, which represents a family of surface-mount quartz crystals. These parts are engineered to replace traditional through-hole HC49/U crystals in modern PCB layouts while maintaining similar electrical performance characteristics and mechanical footprint constraints for space-constrained designs.

Crystals Replacement Considerations

Cross-reference with HC49USM-FF5F18-3.6864MHz if alternative sourcing is required, noting potential manufacturer differences between ILSI and ABRACON.