LFXTAL020423

Overview

The LFXTAL020423 is an 8 MHz fundamental mode quartz crystal resonator manufactured by IQD Frequency Products. It utilizes the HC49/4HSMX surface-mount package, measuring 13.40 mm in length and 4.90 mm in width with a maximum height of 4.30 mm. The component features a load capacitance (CL) of 18 pF and offers a frequency tolerance of ±30 ppm at 25°C. Frequency stability is rated at ±50 ppm across the operating temperature range of -20°C to +70°C. The equivalent series resistance (ESR) is specified at a maximum of 40 Ohms, with a maximum drive level of 500 µW.

Feature Summary

• Sealed metal housing construction provides environmental protection against moisture and contaminants.
• Standardized HC49/4HSMX footprint ensures compatibility with existing SMT assembly processes.
• Fundamental oscillation mode simplifies circuit design for microcontroller clock applications.

Applications

• Microcontroller unit (MCU) main system clocks
• Industrial communication node timing
• General-purpose digital logic circuits

Procurement Notes

Verify the specific suffix or packaging variant required for production, as reel quantities may differ from bulk options. Confirm that the HC49/4HSMX form factor fits within the mechanical constraints of the target enclosure. Ensure the selected distributor is an authorized source to guarantee component authenticity and traceability.

Selection Notes

Select this component when an 8 MHz reference is required for standard industrial environments. The 18 pF load capacitance requires careful PCB layout consideration to account for stray capacitance. Verify that the host oscillator circuit can support the 40 Ohm ESR limit without excessive loading.

Part Context

This part belongs to the HC49/4HSMX series, representing a transition from traditional through-hole crystals to surface-mount technology. It maintains the robust sealing characteristics of legacy HC-49/U units while enabling automated pick-and-place manufacturing. The series is widely adopted in cost-sensitive industrial and consumer electronics.

Replacement Considerations

Direct substitutes include other manufacturers' 8 MHz crystals in the HC49/4HSMX package with matching 18 pF load capacitance and ±30 ppm tolerance. Cross-reference part numbers such as those from Abracon or TXC that specify identical electrical parameters and physical dimensions for pin-compatible replacement.