LFXTAL051755

Overview

The LFXTAL051755 is a quartz crystal resonator manufactured by IQD Frequency Products, operating at a fundamental frequency of 18.432 MHz. It features a load capacitance of 16 pF and an equivalent series resistance (ESR) of 40 Ohms. The component exhibits a frequency tolerance and stability of ±30 ppm. Designed for surface-mount applications, it utilizes the HC49/4HSMX package with dimensions of 11.4 mm in length, 4.9 mm in width, and 4.3 mm in height. The device supports a maximum drive level of 500 uW and operates within a temperature range of -20°C to +70°C.

Feature Summary

• Provides precise timing signals at 18.432 MHz with ±30 ppm stability
• Utilizes compact HC49/4HSMX surface-mount packaging for automated assembly
• Operates reliably across industrial temperature ranges from -20°C to +70°C

Applications

• Microcontroller clock sources
• Communication interface timing
• Digital signal processing circuits

Procurement Notes

Verify the specific package variant and tolerance requirements against your circuit design before ordering. Confirm that the 18.432 MHz frequency aligns with your system's clock generation needs. Ensure the HC49/4HSMX footprint matches your PCB layout constraints. Check for any recent manufacturer updates or alternate part numbers that may supersede this specific model number.

Selection Notes

Select this component when a stable 18.432 MHz reference is required for digital systems. The HC49/4HSMX form factor offers a balance between performance and space efficiency compared to larger through-hole crystals. Consider the ±30 ppm tolerance sufficient for most standard serial communication protocols. Evaluate the 40 Ohm ESR to ensure compatibility with your oscillator circuit's loading requirements.

Part Context

This crystal belongs to IQD's extensive portfolio of frequency control products, which serve automotive, industrial, and consumer markets. The HC49/4HSMX series represents a common surface-mount evolution of traditional HC-49/U crystals, facilitating modern SMT production lines while maintaining robust electrical characteristics for general-purpose timing applications.

Replacement Considerations

Direct substitutes must match the 18.432 MHz frequency, 16 pF load capacitance, and HC49/4HSMX package dimensions. Verify that alternative manufacturers offer comparable ±30 ppm tolerance and 40 Ohm ESR specifications to ensure circuit compatibility without redesign.