LFXTAL035939

Overview

The LFXTAL035939 is a parallel fundamental quartz crystal from the HC49/4HSMX series by IQD Frequency Products. It operates at a nominal frequency of 20 MHz with a frequency tolerance and stability of ±30 ppm. The component features a load capacitance of 22 pF and an equivalent series resistance (ESR) of 40 Ohms. Designed for through-hole mounting, it utilizes a hermetically sealed metal enclosure with glass-to-metal seals on the leads. The device supports a drive level of 100 µW and functions within a temperature range of -40 °C to +85 °C.

Feature Summary

• Hermetically sealed metal enclosure with resistance welding and glass-to-metal seals for high environmental performance
• Parallel fundamental oscillation mode ensuring stable frequency generation
• Through-hole mounting configuration compatible with standard industrial PCB layouts

Applications

• Clock signal generation in digital logic circuits
• Microcontroller system timing references
• Communication interface synchronization modules

Procurement Notes

Verify that the specific order matches the HC49/4HSMX package style and lead configuration required for your assembly process. Confirm that the circuit design accommodates the specified 22 pF load capacitance to ensure accurate frequency operation. Ensure thermal management strategies align with the -40 °C to +85 °C operating range during final product validation.

Selection Notes

Select this component when a robust, hermetically sealed through-hole crystal is required for 20 MHz applications. The HC49/4HSMX series offers superior environmental sealing compared to standard open-frame crystals. Consider the 40 Ohm ESR and 100 µW drive level to ensure compatibility with the oscillator circuit's power requirements and stability needs.

Part Context

This part belongs to the HC49/4HSMX series of quartz crystals manufactured by IQD Frequency Products. The series is characterized by its durable metal can construction and resistance-welded seals, providing reliable performance in demanding environments. It serves as a fundamental frequency reference component within the broader portfolio of passive timing devices offered by the manufacturer.

Replacement Considerations

Direct substitutes must match the 20 MHz frequency, HC49/4HSMX package, and ±30 ppm stability. Verify load capacitance and ESR compatibility before swapping. Generic HC49 crystals may lack the hermetic sealing properties of this specific model.