LFXTAL003181

Overview

The LFXTAL003181 is a surface-mount quartz crystal resonator manufactured by IQD Frequency Products. It operates at a nominal frequency of 20 MHz with a fundamental mode configuration. The device features a frequency tolerance of ±30 ppm at 25°C and a load capacitance of 16 pF. It utilizes an HC-49/US package style, specifically the 4HSMX variant, with a maximum height of 3.1 mm. The equivalent series resistance (ESR) is limited to a maximum of 40 Ohms. The component is designed for industrial applications, maintaining stability within specified limits across operating temperatures.

Feature Summary

• Hermetically sealed construction using resistance welding technology for environmental protection.
• Surface-mount design compatible with standard industrial PCB footprints without layout modifications.
• Fundamental mode operation optimized for microcontroller external clock interfaces.

Applications

• Industrial data acquisition terminal baseboards
• Microcontroller high-speed external clock sources
• Serial communication interface timing

Procurement Notes

Verify the specific package variant against the datasheet, as HC-49/SMD designs may vary in height or pin configuration. Confirm that the load capacitance requirements of the target circuit align with the 16 pF specification to ensure accurate frequency performance. Check for RoHS compliance status if required by project specifications. Ensure the supply voltage and drive level remain within the manufacturer's recommended limits to prevent frequency shifts or damage.

Selection Notes

Select this component when a robust, hermetically sealed SMD crystal is required for 20 MHz applications. It is suitable for environments where temperature stability and long-term reliability are critical. Consider the 16 pF load capacitance requirement during PCB layout to match the oscillator circuit. This part is appropriate for replacing through-hole crystals in space-constrained industrial designs while maintaining similar electrical characteristics.

Part Context

The LFXTAL003181 belongs to IQD Frequency Products' line of industry-standard surface mount crystals. IQD, now part of the Wurth Group, provides a comprehensive range of frequency control solutions. This specific model addresses the need for reliable timing in embedded systems, offering a balance between performance and mechanical compatibility with existing industrial hardware designs.

Replacement Considerations

The IQD part number LFXTAL003181 corresponds to the IQD catalog identifier LFXTAL003181. Cross-reference with other manufacturers' HC-49/SMD 20 MHz crystals ensuring identical load capacitance (16 pF) and ESR limits (max 40 Ohms). Verify package dimensions and sealing method compatibility before substitution.