LFXTAL050991

Overview

The LFXTAL050991 is a parallel fundamental quartz crystal from the CFPX-218 series, manufactured by IQD Frequency Products. It operates at a nominal frequency of 26 MHz with a frequency tolerance and stability of ±20 ppm. The component utilizes a 4-SMD, no-lead surface-mount package measuring 2.5 mm x 2 mm. Key electrical parameters include a load capacitance of 10 pF and an equivalent series resistance (ESR) of 100 Ohms. It supports a drive level of 1 mW and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Hermetically sealed construction using glass-to-metal seals for environmental reliability
• Surface-mount design optimized for space-constrained PCB layouts
• Fundamental mode operation ensuring stable frequency generation

Applications

• General-purpose timing circuits requiring precise clock references
• Embedded systems operating in industrial temperature environments
• Consumer electronics utilizing compact surface-mount architectures

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm exact packaging and tolerance specifications. Ensure compatibility with reflow soldering profiles defined for the 4-SMD no-lead package. Cross-reference the load capacitance requirements with the target oscillator circuit design to maintain frequency accuracy within the specified ±20 ppm limits across the operational temperature range.

Selection Notes

Select this component when a 26 MHz reference is required in a miniature SMD footprint. The 10 pF load capacitance dictates the external capacitor values needed for circuit oscillation. Consider the 100 Ohm ESR limit when designing the oscillator feedback network to ensure reliable startup. The wide temperature range makes it suitable for applications exposed to thermal variation without compromising frequency stability.

Part Context

This part belongs to the CFPX-218 series of miniature quartz crystals. IQD Frequency Products designs these components for high-volume manufacturing integration. The series provides a balance between physical size reduction and electrical performance, serving as a standard timing element for modern digital logic and microcontroller-based systems.

Replacement Considerations

Direct substitutes must match the 26 MHz frequency, 10 pF load capacitance, and 4-SMD no-lead package dimensions. Verify that alternative manufacturers offer identical ±20 ppm stability and -40°C to +85°C operating ranges to ensure functional parity in existing designs.