LFXTAL059591 26 MHz Crystal Equivalent & Substitute Parts

Part Overview

The LFXTAL059591 is a 26 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products, designed for surface mount applications in the IQXC-42 series. This component operates across the industrial temperature range of -40°C to 85°C and is specified for 10pF load capacitance with 100 Ohms equivalent series resistance. The part is currently in active production status with ROHS3 compliance and REACH unaffected classification. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across frequency, load capacitance, ESR, package configuration, and operating temperature specifications.

Substiute Parts

LFXTAL059591

IQD Frequency ProductsIn Stock: 785LFXTAL059591 Datasheet

Current PartRFQ

830059591

Würth ElektronikIn Stock: 1836830059591 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFXTAL059591 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Frequency: 26.0000 MHz (exact match required)
• Frequency Tolerance: ±15 ppm (maximum allowable deviation)
• Frequency Stability: ±20 ppm (temperature coefficient specification)
• Load Capacitance: 10 pF (circuit design requirement)
• Equivalent Series Resistance: 100 Ohms (oscillator startup and drive level compatibility)
• Operating Mode: Fundamental (no overtone operation)

Mechanical Parameters:

• Package / Case: 4-SMD, No Lead (PCB footprint compatibility)
• Size / Dimension: 2.00 mm x 1.60 mm (board layout constraint)
• Height - Seated (Max): 0.50 mm (clearance requirement)
• Mounting Type: Surface Mount (assembly process compatibility)

Environmental & Compliance Parameters:

• Operating Temperature Range: -40°C to 85°C (application environment)
• RoHS Status: ROHS3 Compliant (regulatory requirement)
• REACH Status: REACH Unaffected (material compliance)

Substitute parts must match all parameters listed above. No deviations in frequency, load capacitance, ESR, package dimensions, or temperature range are permitted.

Parameter Comparison

Engineering Selection Recommendations

The 830059591 manufactured by Würth Elektronik is a parametric equivalent to the LFXTAL059591. Both components are active production parts with identical electrical specifications, mechanical dimensions, and compliance certifications.

Selection Basis:

1. Electrical Equivalence: All frequency, tolerance, stability, load capacitance, and ESR parameters are identical between the two parts.

2. Mechanical Compatibility: Package configuration, footprint dimensions (2.00 x 1.60 mm), and maximum seated height (0.50 mm) are identical, ensuring direct PCB layout compatibility.

3. Environmental Compliance: Both parts operate across -40°C to 85°C and maintain ROHS3 compliance and REACH unaffected status.

4. Production Status: Both components are in active production, ensuring long-term availability and supply chain stability.

5. Inventory Availability: The Würth Elektronik part (830059591) currently has higher inventory availability (1739 Pcs) compared to the IQD part (678 Pcs).

Selection between these two parts may be based on supplier preference, lead time, pricing, or existing qualification history within the design organization. No electrical or mechanical re-qualification is required when substituting between these parts.

Frequently Asked Questions (FAQ)

Q1: Can the 830059591 be used as a direct replacement for the LFXTAL059591 without circuit modification?

A: Yes. The 830059591 is a parametric equivalent with identical frequency (26 MHz), load capacitance (10 pF), ESR (100 Ohms), operating temperature range (-40°C to 85°C), and package dimensions (2.00 x 1.60 mm, 0.50 mm height). No circuit modifications are required.

Q2: Are there any differences in the 4-SMD, No Lead package between the two manufacturers?

A: Both parts use the same 4-SMD, No Lead package configuration with identical external dimensions and maximum seated height. PCB footprints are interchangeable.

Q3: Do both parts meet the same regulatory and compliance requirements?

A: Yes. Both the LFXTAL059591 and 830059591 are ROHS3 compliant and REACH unaffected, meeting identical regulatory standards.

Q4: What is the significance of the ±15 ppm frequency tolerance and ±20 ppm frequency stability?

A: The ±15 ppm tolerance specifies the initial frequency accuracy at 25°C. The ±20 ppm stability specifies the maximum frequency deviation across the -40°C to 85°C operating temperature range. Both parts maintain these specifications identically.

Q5: Can these crystals be used interchangeably in high-frequency or precision timing applications?

A: Yes, provided the application requirements do not exceed the specified frequency tolerance (±15 ppm) and stability (±20 ppm). Both parts are suitable for applications requiring 26 MHz fundamental mode operation within these specifications.

Q6: Is there a preferred part based on supply chain considerations?

A: The 830059591 (Würth Elektronik) currently has higher inventory availability (1739 Pcs vs. 678 Pcs). Selection should be based on organizational supplier agreements, lead time requirements, and pricing.

Q7: What is the load capacitance specification, and why is it critical for substitution?

A: Load capacitance (10 pF) is the capacitive load the crystal oscillator circuit presents to the crystal. This parameter must match exactly between substitute parts, as mismatches will cause frequency deviation and potential circuit instability.

Q8: Are there any temperature-related performance differences between the two parts?

A: No. Both parts operate identically across the -40°C to 85°C range with ±20 ppm frequency stability. Temperature performance is equivalent.