HC49US-FF5F18-14.7456MHZ

Crystals Overview

The ILSI HC49US-FF5F18-14.7456MHZ is a fundamental mode quartz crystal resonator designed for surface-mount applications. It operates at a nominal frequency of 14.7456 MHz with a load capacitance of 18 pF and an equivalent series resistance (ESR) of 40 Ohms. The component features a frequency tolerance and stability of ±30 ppm, ensuring reliable timing performance across a wide operating temperature range from -40°C to +85°C. Housed in the standard HC-49/US package measuring 11.40mm x 4.73mm x 4.50mm, it utilizes AT-cut technology for low aging rates.

Crystals Feature Summary

• Fundamental mode quartz construction utilizing AT-cut technology for stable oscillation
• Surface-mount design compatible with automated assembly processes
• Wide operational temperature capability suitable for industrial environments

Crystals Applications

• Microcontroller clock generation circuits
• Communication interface timing references
• Digital signal processing systems

Crystals Procurement Notes

Verify the specific suffix FF5F18 corresponds to the required 18pF load capacitance and 40 Ohm ESR specifications. Confirm that the HC-49/US surface-mount footprint matches the PCB layout requirements. Ensure the ±30 ppm tolerance meets the system's timing accuracy constraints. Check RoHS compliance status if restricted substances are mandated by the end product regulations.

Crystals Selection Notes

Select this component when a precise 14.7456 MHz reference is required for surface-mounted designs. The HC-49/US form factor offers mechanical robustness compared to smaller packages. Consider the 40 Ohm ESR value for oscillator circuit compatibility. The ±30 ppm stability is adequate for general digital logic timing but may require tighter tolerances for high-precision communication protocols.

Crystals Part Context

This part belongs to the ILSI HC49US series of fundamental quartz crystals. The series provides various frequency options within the standard HC-49/US surface-mount package. These components are widely used in consumer electronics and industrial equipment requiring cost-effective yet reliable timing solutions. The model number encodes key parameters including load capacitance and frequency.

Crystals Replacement Considerations

Direct substitutes include other manufacturers' HC-49US series crystals with identical 14.7456 MHz frequency, 18pF load capacitance, and ±30 ppm tolerance. Verify that replacement parts maintain the same 40 Ohm ESR and physical dimensions to ensure board compatibility without re-verification of the oscillator circuit.