LFXTAL033643 Crystal Oscillator Equivalent & Substitute Parts

Part Overview

The LFXTAL033643 is a 14.31818 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products. This surface mount device operates with an 18pF load capacitance and 70 Ohms equivalent series resistance, designed for applications requiring precise frequency generation in the 14.31818 MHz band. The component is currently in active production status with ROHS3 compliance and is available in 4-SMD, No Lead surface mount packaging. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

LFXTAL033643

IQD Frequency ProductsIn Stock: 756LFXTAL033643 Datasheet

Current PartRFQ

830033643

Würth ElektronikIn Stock: 1767830033643 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFXTAL033643 is determined by strict equivalence across the following critical parameters:

Frequency Specification: The substitute part must operate at exactly 14.31818 MHz with identical frequency stability of ±50ppm. This parameter is non-negotiable for circuit timing and synchronization functions.

Load Capacitance: The substitute must present 18pF load capacitance to maintain circuit resonance and oscillation characteristics without requiring tuning adjustments.

Equivalent Series Resistance (ESR): The substitute must maintain 70 Ohms ESR to ensure compatible drive levels and power consumption in the host circuit.

Operating Mode: The substitute must operate in fundamental mode, not overtone mode, to match the frequency generation method of the original part.

Operating Temperature Range: The substitute must support the -10°C to 60°C operating window to ensure reliability across the specified thermal envelope.

Package and Mounting: The substitute must use identical 4-SMD, No Lead surface mount packaging with matching physical dimensions (5.00mm × 3.20mm × 1.00mm max height) to ensure PCB layout compatibility without redesign.

Compliance Standards: The substitute must maintain ROHS3 compliance and equivalent regulatory certifications (REACH Unaffected, EAR99 classification).

Parameter Comparison

Engineering Selection Recommendations

The 830033643 manufactured by Würth Elektronik is a parametric equivalent to the LFXTAL033643. Both components are active production parts with identical electrical specifications, mechanical packaging, and regulatory compliance profiles.

Selection Basis:

Both parts meet the specified 14.31818 MHz frequency requirement with ±50ppm stability and tolerance. The matching 18pF load capacitance and 70 Ohms ESR ensure circuit performance equivalence without modification to oscillator tank circuits or drive circuitry.

The identical 4-SMD, No Lead package with 5.00mm × 3.20mm × 1.00mm dimensions permits direct PCB footprint compatibility. No layout redesign is required for substitution.

Both components maintain ROHS3 compliance, REACH Unaffected status, and EAR99 export classification, ensuring equivalent regulatory and supply chain standing.

The -10°C to 60°C operating temperature range is identical, confirming thermal envelope compatibility across the specified application environment.

Selection between these parts may be based on availability, lead time, pricing, or supply chain strategy, as all electrical and mechanical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the 830033643 be used as a direct replacement for the LFXTAL033643 without circuit modifications?

A: Yes. The 830033643 is a parametric equivalent with identical frequency, load capacitance, ESR, operating mode, temperature range, and package specifications. No circuit modifications are required.

Q: Are there any differences in frequency accuracy between these parts?

A: No. Both parts specify ±50ppm frequency stability and ±50ppm frequency tolerance. Frequency accuracy is equivalent.

Q: Will the 830033643 fit the same PCB footprint as the LFXTAL033643?

A: Yes. Both parts use 4-SMD, No Lead packaging with identical dimensions of 5.00mm length × 3.20mm width × 1.00mm maximum seated height. PCB footprints are compatible without modification.

Q: Are both parts compliant with current environmental and export regulations?

A: Yes. Both the LFXTAL033643 and 830033643 are ROHS3 compliant, REACH Unaffected, and classified as EAR99 for export purposes.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -10°C to 60°C. This range is identical and suitable for standard industrial and commercial applications.

Q: Can these parts be used interchangeably in production?

A: Yes. The parametric equivalence across all critical electrical and mechanical parameters permits interchangeable use in production environments. Supply chain flexibility is maintained without design or qualification changes.

Q: Is there a difference in load capacitance between these parts?

A: No. Both parts specify 18pF load capacitance. Oscillator tank circuit tuning remains unchanged.

Q: What is the ESR specification for both parts?

A: Both parts specify 70 Ohms equivalent series resistance. Drive circuit requirements and power consumption are equivalent.