LFXTAL059526 14.31818 MHz Crystal Equivalent & Substitute Parts

Part Overview

The LFXTAL059526 is a 14.31818 MHz fundamental mode crystal manufactured by IQD Frequency Products, designed for surface mount applications in 4-SMD, No Lead packaging. This active product operates across the industrial temperature range of -40°C to 85°C with ±20ppm frequency tolerance and 18pF load capacitance. Substitute parts are identified to address inventory availability, lead time requirements, or specific application constraints while maintaining electrical and mechanical compatibility within defined parameters.

Key Parameters

Parameter	Value	Unit
Frequency	14.31818	MHz
Frequency Tolerance	±20	ppm
Frequency Stability	±30	ppm
Load Capacitance	18	pF
Operating Mode	Fundamental
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount
Package Type	4-SMD, No Lead
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LFXTAL059526 is determined by strict equivalence across the following critical parameters: frequency (14.31818 MHz), frequency tolerance (±20ppm), load capacitance (18pF), operating mode (Fundamental), operating temperature range (-40°C to 85°C), mounting type (Surface Mount), and package configuration (4-SMD, No Lead).

Substitute parts are classified into two categories:

Direct Electrical Equivalents: Parts matching all critical electrical parameters with ESR (Equivalent Series Resistance) within acceptable operational margins. These parts maintain identical frequency, tolerance, load capacitance, and temperature specifications.

Parametric Equivalents: Parts meeting all critical electrical parameters but with dimensional or packaging variations that remain compatible with the application footprint and assembly process.

The ESR parameter is monitored as a secondary selection criterion; variations in ESR (70 Ohms to 100 Ohms) do not disqualify substitution when all primary parameters align, provided circuit design accommodates the specified range.

Parameter Comparison

Parameter	LFXTAL059526 (IQD)	ABM8G-14.31818MHZ-18-D2Y-T (Abracon)	ECS-143-18-33-JGN-TR (ECS)	830059526 (Würth Elektronik)
Manufacturer	IQD Frequency Products	Abracon LLC	ECS Inc.	Würth Elektronik
Frequency	14.31818 MHz	14.31818 MHz	14.31818 MHz	14.31818 MHz
Frequency Tolerance	±20 ppm	±20 ppm	±20 ppm	±20 ppm
Frequency Stability	±30 ppm	±30 ppm	±30 ppm	±30 ppm
Load Capacitance	18 pF	18 pF	18 pF	18 pF
ESR	70 Ohms	80 Ohms	100 Ohms	70 Ohms
Operating Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C
Operating Mode	Fundamental	Fundamental	Fundamental	Fundamental
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size (L x W)	5.00 x 3.20 mm	3.20 x 2.50 mm	3.20 x 2.50 mm	5.00 x 3.20 mm
Height (Max)	1.00 mm	1.00 mm	0.80 mm	1.00 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Tape & Reel (TR)	Cut Tape (CT)	Tape & Reel (TR)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

830059526 (Würth Elektronik): This part is classified as a parametric equivalent with identical electrical specifications and matching physical dimensions to the LFXTAL059526. Both parts share the CFPX-104 series designation, 70 Ohms ESR, and 5.00 x 3.20 mm footprint. Selection of this substitute is appropriate when Würth Elektronik supply chain or logistics requirements align with project needs. RoHS3 compliance and REACH Unaffected status match the main part.

ABM8G-14.31818MHZ-18-D2Y-T (Abracon LLC): This part meets all critical electrical parameters with 80 Ohms ESR, representing a 10 Ohms increase from the main part. The smaller footprint (3.20 x 2.50 mm) requires verification of PCB layout compatibility and assembly process validation. This substitute is suitable for space-constrained applications where the reduced dimensions provide design advantage. Tape & Reel packaging maintains production compatibility. REACH Affected status requires compliance verification in regulated markets.

ECS-143-18-33-JGN-TR (ECS Inc.): This part satisfies all critical electrical parameters with 100 Ohms ESR and the smallest height profile (0.80 mm). The 3.20 x 2.50 mm footprint and Cut Tape packaging format require PCB layout confirmation and assembly line process adjustment. Selection is appropriate for applications prioritizing minimal height or where Cut Tape format aligns with production workflows. MSL rating of 1 (Unlimited) indicates no moisture sensitivity constraints. REACH Unaffected status provides regulatory alignment with the main part.

All substitute parts maintain active product status and ROHS3 compliance, supporting long-term availability and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can ABM8G-14.31818MHZ-18-D2Y-T be used as a direct replacement for LFXTAL059526 without circuit modification?

A: ABM8G-14.31818MHZ-18-D2Y-T is electrically equivalent across frequency, tolerance, load capacitance, and temperature specifications. The 10 Ohms ESR increase (80 Ohms vs. 70 Ohms) falls within acceptable operational parameters for most applications. However, the smaller footprint (3.20 x 2.50 mm vs. 5.00 x 3.20 mm) requires PCB layout verification to confirm pad compatibility and assembly feasibility. No circuit modification is required if footprint compatibility is confirmed.

Q: What is the significance of the ESR difference between substitute parts?

A: ESR (Equivalent Series Resistance) affects crystal oscillator startup characteristics and power consumption. The LFXTAL059526 and 830059526 both specify 70 Ohms, while ABM8G-14.31818MHZ-18-D2Y-T specifies 80 Ohms and ECS-143-18-33-JGN-TR specifies 100 Ohms. These variations remain within acceptable ranges for 14.31818 MHz fundamental mode crystals. Circuit design must accommodate the specified ESR range; higher ESR may require oscillator circuit tuning in sensitive applications.

Q: Does packaging format (Tape & Reel vs. Cut Tape) affect electrical performance?

A: Packaging format does not affect electrical performance. LFXTAL059526, ABM8G-14.31818MHZ-18-D2Y-T, and 830059526 are supplied in Tape & Reel format suitable for automated assembly. ECS-143-18-33-JGN-TR is supplied in Cut Tape format, which requires manual or semi-automated handling. Selection between formats depends on production line capabilities and volume requirements, not electrical compatibility.

Q: Are all substitute parts suitable for the full -40°C to 85°C operating temperature range?

A: Yes. All substitute parts specify -40°C to 85°C operating temperature range, matching the LFXTAL059526. Frequency stability (±30ppm) and tolerance (±20ppm) are maintained across this entire range for all parts listed.

Q: What is the impact of the smaller footprint in ABM8G-14.31818MHZ-18-D2Y-T and ECS-143-18-33-JGN-TR?

A: The reduced footprint (3.20 x 2.50 mm vs. 5.00 x 3.20 mm) provides space savings on PCB layouts. However, substitution requires confirmation that existing pad patterns accommodate the smaller dimensions. Assembly equipment must be validated for the new footprint. Height differences (1.00 mm for ABM8G vs. 0.80 mm for ECS-143) may affect clearance in space-constrained designs.

Q: Is REACH compliance status a factor in substitute selection?

A: REACH compliance status should be evaluated based on end-market requirements. LFXTAL059526 and ECS-143-18-33-JGN-TR are REACH Unaffected, while ABM8G-14.31818MHZ-18-D2Y-T is REACH Affected. For applications subject to REACH regulations, REACH Unaffected parts are preferred. For applications without REACH requirements, REACH Affected status does not restrict substitution.

Q: Can 830059526 be considered a direct replacement for LFXTAL059526?

A: Yes. 830059526 is a parametric equivalent with identical electrical specifications (14.31818 MHz, ±20ppm tolerance, 18pF load capacitance, 70 Ohms ESR) and matching physical dimensions (5.00 x 3.20 mm, 1.00 mm height). Both parts share the CFPX-104 series designation. Direct substitution is supported without PCB layout or circuit modification.

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