LFXTAL035267 Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The LFXTAL035267 is a 24.576 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products. This surface mount device operates with a 16pF load capacitance and 50 Ohms equivalent series resistance, housed in a compact 4-SMD, No Lead package measuring 3.20mm x 2.50mm. The component maintains frequency stability of ±50ppm across an operating temperature range of -10°C to 60°C and is ROHS3 compliant. As an active product with established supply availability, equivalent substitute parts may be required for supply chain optimization, design flexibility, or inventory management purposes.

Key Parameters

Parameter	Value
Frequency	24.576 MHz
Frequency Stability	±50ppm
Load Capacitance	16pF
ESR (Equivalent Series Resistance)	50 Ohms
Operating Mode	Fundamental
Operating Temperature Range	-10°C to 60°C
Package Type	4-SMD, No Lead
Package Dimensions	3.20mm x 2.50mm x 0.80mm (Max Height)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LFXTAL035267 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must match the following specifications without deviation:

Frequency: 24.576 MHz (exact match required)
Frequency Stability: ±50ppm (tolerance band must be identical)
Load Capacitance: 16pF (exact match required)
ESR: 50 Ohms (exact match required)
Operating Mode: Fundamental
Operating Temperature Range: -10°C to 60°C (minimum range requirement)
Package Configuration: 4-SMD, No Lead
Physical Dimensions: 3.20mm x 2.50mm footprint with 0.80mm maximum seated height
Compliance: ROHS3 Compliant, REACH Unaffected

The substitute part 830035267 from Würth Elektronik meets all these criteria and is classified as a parametric equivalent.

Parameter Comparison

Parameter	LFXTAL035267 (IQD)	830035267 (Würth Elektronik)	Match Status
Frequency	24.576 MHz	24.576 MHz	Equivalent
Frequency Stability	±50ppm	±50ppm	Equivalent
Frequency Tolerance	±50ppm	±50ppm	Equivalent
Load Capacitance	16pF	16pF	Equivalent
ESR	50 Ohms	50 Ohms	Equivalent
Operating Mode	Fundamental	Fundamental	Equivalent
Operating Temperature	-10°C to 60°C	-10°C to 60°C	Equivalent
Package Type	4-SMD, No Lead	4-SMD, No Lead	Equivalent
Package Dimensions	3.20mm x 2.50mm	3.20mm x 2.50mm	Equivalent
Max Seated Height	0.80mm	0.80mm	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the LFXTAL035267 and 830035267 are active products with full compliance to ROHS3 and REACH regulations. Selection between these parts is based on supply chain availability, lead time requirements, and inventory positioning rather than technical performance differences.

The LFXTAL035267 from IQD Frequency Products is suitable for applications requiring established IQD supply relationships or specific design documentation tied to the CFPX-180 series. The 830035267 from Würth Elektronik provides an alternative source with equivalent electrical and mechanical specifications, offering supply diversification and access to the WE-XTAL series product line.

Both components are packaged in Tape & Reel format suitable for automated assembly processes. The identical package footprint and height specifications ensure direct mechanical compatibility on printed circuit boards without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the 830035267 be used as a direct replacement for the LFXTAL035267 in existing designs?

A: Yes. The 830035267 meets all electrical and mechanical specifications of the LFXTAL035267. The identical frequency, stability, load capacitance, ESR, operating temperature range, and 4-SMD package configuration enable direct substitution without circuit design changes or PCB layout modifications.

Q: Are there any differences in the package footprint between these two parts?

A: No. Both parts use identical 4-SMD, No Lead packaging with 3.20mm x 2.50mm footprint dimensions and 0.80mm maximum seated height. The parts are mechanically interchangeable on the same PCB layout.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the LFXTAL035267 and 830035267 are ROHS3 compliant and REACH unaffected. They meet identical regulatory requirements for use in regulated applications.

Q: What is the significance of the 24.576 MHz frequency specification?

A: The 24.576 MHz frequency is a standard clock frequency used in digital audio and telecommunications applications. Both parts operate at this exact frequency with ±50ppm stability, ensuring compatibility with systems designed for this specific clock rate.

Q: Are there any temperature range limitations when substituting between these parts?

A: No. Both parts operate across the identical temperature range of -10°C to 60°C. There are no temperature-related constraints when substituting between the LFXTAL035267 and 830035267.

Q: What does the 16pF load capacitance specification mean for circuit design?

A: The 16pF load capacitance specifies the capacitive load that the crystal oscillator circuit must present for the part to operate at the specified frequency and stability. Both substitute parts require identical load capacitance values, ensuring circuit compatibility without oscillator tuning adjustments.

Q: Is the 50 Ohms ESR specification critical for substitution?

A: Yes. The 50 Ohms equivalent series resistance is a critical parameter that affects oscillator circuit performance and startup characteristics. Both parts specify identical 50 Ohms ESR, ensuring equivalent circuit behavior and eliminating the need for oscillator circuit redesign.

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