LFXTAL030798

Overview

The LFXTAL030798 is a surface-mount quartz crystal resonator from the HC49/4HSMX series, manufactured by IQD Frequency Products. It operates at a nominal frequency of 3.6864 MHz with a base harmonic mode. The component features a frequency tolerance of ±30 ppm and a stability of ±50 ppm across its operating temperature range of -40°C to +85°C. Designed for robust industrial applications, it utilizes a hermetic seal with glass-metal sealed pins and resistance welding to ensure reliability in humid environments. The unit has a load capacitance of 16 pF and an equivalent series resistance (ESR) of 300 Ohms. Its physical dimensions are 11.4 mm in length, 4.9 mm in width, and 4.3 mm in height.

Feature Summary

• Hermetic sealing with glass-metal sealed pins ensures high reliability in humid conditions
• Resistance welding and inert gas sealing provide superior moisture protection compared to plastic packages
• Base harmonic operation simplifies circuit design without requiring overtone matching

Applications

• Industrial gateways requiring stable low-speed peripheral clocks
• Modbus communication interfaces demanding precise timing
• CANopen network nodes sensitive to clock drift

Procurement Notes

Verify the specific package variant and tolerance grade against the official datasheet before ordering. Confirm that the hermetic sealing requirements align with the environmental conditions of the target application. Ensure the load capacitance matches the oscillator circuit design specifications to maintain frequency accuracy within the specified ppm limits.

Selection Notes

Select this component when long-term frequency stability is critical for serial communication protocols like UART. The 3.6864 MHz frequency allows for zero-error baud rate generation for common speeds such as 115200 and 9600 bps. Choose this part over standard plastic-packaged crystals if the device will operate in high-humidity or harsh industrial environments where moisture-induced frequency shifts must be avoided.

Part Context

This crystal belongs to the HC49/4HSMX series, which is widely recognized for its durability in industrial settings. IQD Frequency Products, now part of the Wurth Group, leverages decades of manufacturing expertise to produce these components. The series is designed to meet the rigorous demands of aerospace, automotive, and medical industries, offering consistent performance across wide temperature ranges.

Replacement Considerations

The IQD part number LFXTAL030798 corresponds to the Wurth Elektronik part number 830030798. When substituting, ensure the replacement maintains the same 3.6864 MHz frequency, 16 pF load capacitance, and hermetic sealing characteristics to preserve system integrity.