LFXTAL033644 24.576 MHz Crystal Equivalent & Substitute Parts

Part Overview

The LFXTAL033644 is a 24.576 MHz fundamental mode quartz crystal manufactured by IQD Frequency Products. This surface mount crystal is specified for 18pF load capacitance with 40 Ohms equivalent series resistance and operates across the -10°C to 60°C temperature range. The component is actively produced and ROHS3 compliant, making it suitable for applications requiring stable frequency reference in telecommunications, audio processing, and digital signal processing circuits. Substitute parts are identified based on identical electrical specifications and mechanical compatibility to ensure direct circuit board replacement without design modification.

Substiute Parts

LFXTAL033644

IQD Frequency ProductsIn Stock: 730LFXTAL033644 Datasheet

Current PartRFQ

830033644

Würth ElektronikIn Stock: 1778830033644 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LFXTAL033644 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Frequency: 24.576 MHz (exact match required)
• Frequency Stability: ±50ppm (exact match required)
• Load Capacitance: 18pF (exact match required)
• Equivalent Series Resistance: 40 Ohms (exact match required)
• Operating Mode: Fundamental (exact match required)

Mechanical Equivalence Requirements:

• Package Type: 4-SMD, No Lead (exact match required)
• Physical Dimensions: 5.00mm L × 3.20mm W × 1.00mm H maximum seated height (exact match required)
• Mounting Type: Surface Mount (exact match required)

Environmental & Compliance Equivalence:

• Operating Temperature Range: -10°C to 60°C (exact match required)
• RoHS Status: ROHS3 Compliant (minimum requirement)

Only components meeting all stated parameters across electrical, mechanical, and environmental categories qualify as direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The 830033644 manufactured by Würth Elektronik is a parametric equivalent substitute for the LFXTAL033644. Both components are actively produced and carry identical electrical specifications, mechanical dimensions, and environmental ratings. Selection between these two parts may be based on:

Availability and Lead Time: Current inventory shows 1753 units of the 830033644 in stock compared to 657 units of the LFXTAL033644, providing greater availability for the Würth Elektronik alternative.

Compliance Status: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent regulatory requirements for industrial and commercial applications.

Supply Chain Considerations: Both components are packaged in Tape & Reel format suitable for automated assembly processes. The identical 4-SMD, No Lead package and 5.00 × 3.20 × 1.00mm footprint ensure direct board-level compatibility without layout modification.

Series Designation: Both parts reference the CFPX-104 series, indicating design compatibility within this crystal family.

Frequently Asked Questions (FAQ)

Q: Can the 830033644 be used as a direct replacement for the LFXTAL033644 on existing circuit boards?

A: Yes. The 830033644 is electrically and mechanically equivalent. Both components share identical frequency (24.576 MHz), load capacitance (18pF), ESR (40 Ohms), operating temperature range (-10°C to 60°C), and physical dimensions (5.00 × 3.20 × 1.00mm). No circuit design changes or board layout modifications are required.

Q: Are there any differences in frequency stability between these two crystals?

A: No. Both the LFXTAL033644 and 830033644 specify ±50ppm frequency stability and ±50ppm frequency tolerance. They are equivalent in this parameter.

Q: What is the significance of the 18pF load capacitance specification?

A: The 18pF load capacitance is the capacitive load for which the crystal frequency is calibrated. Both substitute parts are specified for identical 18pF load capacitance, ensuring equivalent frequency response in circuits designed for this load value.

Q: Do both crystals operate in the same temperature range?

A: Yes. Both the LFXTAL033644 and 830033644 operate across -10°C to 60°C. They are equivalent for temperature-dependent applications within this range.

Q: What does "4-SMD, No Lead" package mean?

A: This designates a surface mount device with four solder pads and no through-hole leads. Both parts use this identical package type, enabling direct substitution on surface mount circuit boards.

Q: Are both parts RoHS compliant?

A: Yes. Both the LFXTAL033644 and 830033644 are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory standards.

Q: What is the ESR (Equivalent Series Resistance) and why is it important?

A: ESR is the internal resistance of the crystal at the operating frequency. Both parts specify 40 Ohms ESR. This parameter affects circuit startup time and oscillation amplitude and must match the oscillator circuit design specifications.

Q: Can these crystals be used interchangeably in automated assembly?

A: Yes. Both components are supplied in Tape & Reel packaging suitable for pick-and-place equipment. The identical footprint and electrical specifications support interchangeable use in automated manufacturing processes.