HC49USM-FF3F18-12.000 MHZ

Crystals Overview

The ILSI HC49USM-FF3F18-12.000 MHZ is a surface-mount quartz crystal resonator operating at a nominal frequency of 12 MHz. It features a frequency tolerance and stability of ±30 ppm, with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 60 Ohms. The component utilizes the HC-49/US package, measuring 11.40 mm in length, 4.73 mm in width, and 4.50 mm in maximum height. Designed for fundamental mode operation, it supports a temperature range of -40°C to +85°C.

Crystals Feature Summary

• Surface-mount construction within the standardized HC-49/US package
• Fundamental oscillation mode for stable frequency generation
• Compliant with lead-free processing standards

Crystals Applications

• General-purpose clock signal generation in electronic circuits
• Timing references for microcontroller systems
• Communication interface synchronization modules

Crystals Procurement Notes

Verify the specific suffix FF3F18 against official ILSI documentation to confirm exact electrical parameters and mechanical dimensions. Ensure compatibility with automated surface-mount assembly processes. Cross-reference datasheets from authorized distributors to validate current availability and manufacturing status before finalizing procurement plans.

Crystals Selection Notes

Select this component when a 12 MHz reference signal is required in space-constrained designs utilizing SMD technology. The HC-49/US form factor offers a balance between performance and footprint. Consider the ±30 ppm tolerance and 60 Ohm ESR requirements to ensure proper oscillator circuit design and reliable startup conditions within the specified industrial temperature range.

Crystals Part Context

This part belongs to the ILSI HC49USM series of quartz crystals. The series provides various frequency options in a consistent surface-mount package. These components are widely used in consumer electronics and industrial equipment requiring precise timing. The HC49USM designation indicates a specific metal can style adapted for modern PCB mounting techniques.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49/US 12 MHz crystals with matching 18 pF load capacitance and similar ESR values. Verify that alternative parts meet the same ±30 ppm stability and temperature range specifications to maintain system timing integrity.