HC49USM-FF3F18-20.000MHZ

Crystals Overview

The HC49USM-FF3F18-20.000MHZ is a surface-mount quartz crystal oscillator manufactured by ILSI America. It operates at a nominal frequency of 20.000 MHz with a load capacitance of 18 pF. The component features a standard SMD package measuring 13.3 mm x 4.7 mm. It exhibits a frequency stability of ±30 ppm and an equivalent series resistance (ESR) of 30 Ohms. The device is designed for lead-free processing and RoHS compliance, supporting operation within a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Surface mount design compatible with automated pick-and-place assembly processes
• Grounded package configuration to minimize electromagnetic interference emissions
• Lead-free construction compliant with environmental regulations

Crystals Applications

• T1/E1 and T3/E3 system clocking
• Wi-Fi and 802.11 wireless communication modules
• SONET/SDH network synchronization equipment

Crystals Procurement Notes

Verify the specific suffix codes against the manufacturer's current part number guide to confirm exact tolerance and aging specifications. Ensure the selected variant matches the required operating temperature range and drive level for the target circuit application before finalizing procurement orders.

Crystals Selection Notes

Select this component when a surface-mount quartz crystal is required for high-frequency timing applications. Consider the 18 pF load capacitance requirement of the host oscillator circuit. Evaluate the ±30 ppm stability against system jitter requirements and verify compatibility with lead-free soldering profiles during manufacturing.

Crystals Part Context

This model belongs to the HC49USM series of surface-mount quartz crystals from ILSI America. The series provides alternatives to traditional through-hole HC-49/U packages while maintaining similar electrical characteristics. These components are engineered for compact electronic designs requiring precise frequency references in telecommunications and data storage systems.

Crystals Replacement Considerations

Cross-reference with other HC49USM variants from ILSI or competitors offering identical 20 MHz frequency, 18 pF load capacitance, and 30 Ohm ESR. Verify that substitute parts match the physical footprint dimensions and pinout configuration to ensure mechanical fit without PCB redesign.