LFXTAL026396 24.576 MHz Crystal Equivalent & Substitute Parts

Part Overview

The LFXTAL026396 is a 24.576 MHz fundamental mode crystal manufactured by IQD Frequency Products, supplied in 4-SMD, No Lead surface mount packaging. This component is classified as Active product status and is ROHS3 compliant. Alternative equivalent parts are necessary to address supply chain flexibility, inventory availability, or specific application requirements where load capacitance or ESR characteristics require adjustment within acceptable tolerance ranges.

Substiute Parts

LFXTAL026396

IQD Frequency ProductsIn Stock: 1123LFXTAL026396 Datasheet

Current PartRFQ

406C35B24M57600

CTS-Frequency ControlsIn Stock: 1515406C35B24M57600 Datasheet

SimilarRFQ

ECS-245-20-30B-TR

ECS Inc.In Stock: 3352ECS-245-20-30B-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LFXTAL026396 is determined by strict alignment of the following parameters:

Critical Parameters (Must Match Exactly):

• Frequency: 24.576 MHz
• Frequency Tolerance: ±30 ppm
• Frequency Stability: ±50 ppm
• Operating Mode: Fundamental
• Operating Temperature Range: -20°C to 70°C
• Mounting Type: Surface Mount
• Package / Case: 4-SMD, No Lead

Allowable Variation Parameters:

• Load Capacitance: Variation permitted within circuit design margins (13 pF to 20 pF range acceptable with circuit tuning adjustment)
• ESR (Equivalent Series Resistance): Variation permitted within oscillator design specifications (30 Ohms to 40 Ohms range acceptable)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant required
• ECCN: EAR99 (all candidates match)
• HTSUS: 8541.60.0060 (all candidates match)

Both substitute parts meet all critical parameters and compliance requirements. Load capacitance and ESR variations are within acceptable engineering tolerances for crystal oscillator circuit design.

Parameter Comparison

Engineering Selection Recommendations

LFXTAL026396 (IQD Frequency Products)

Primary selection when original specification calls for 16 pF load capacitance and 40 Ohms ESR. Active product status with established supply chain. ROHS3 compliant. Suitable for applications with existing circuit tuning optimized for these parameters.

406C35B24M57600 (CTS-Frequency Controls)

Equivalent substitute with 13 pF load capacitance and 40 Ohms ESR. Active product status. ROHS3 compliant. Smaller physical footprint (6.00 mm x 3.50 mm) compared to LFXTAL026396. Lower load capacitance requires circuit tuning adjustment. Suitable for space-constrained applications where load capacitance adjustment is feasible.

ECS-245-20-30B-TR (ECS Inc.)

Equivalent substitute with 20 pF load capacitance and 30 Ohms ESR. Active product status. ROHS3 compliant. Smallest physical footprint (5.00 mm x 3.20 mm) and lowest profile (0.85 mm height). Lower ESR provides improved oscillator startup characteristics. Higher load capacitance requires circuit tuning adjustment. Suitable for compact designs and applications benefiting from reduced ESR.

All three parts satisfy critical frequency, tolerance, stability, operating temperature, and compliance requirements. Selection between substitutes depends on circuit design parameters for load capacitance and ESR accommodation, as well as physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LFXTAL026396 with the 406C35B24M57600?

A: Yes. Both parts operate at 24.576 MHz with ±30 ppm tolerance and ±50 ppm stability. The 406C35B24M57600 has 13 pF load capacitance versus 16 pF on the LFXTAL026396. Circuit tuning adjustment is required to accommodate the lower load capacitance. ESR is identical at 40 Ohms. All compliance and temperature specifications match.

Q: Can I substitute the LFXTAL026396 with the ECS-245-20-30B-TR?

A: Yes. Both parts operate at 24.576 MHz with ±30 ppm tolerance and ±50 ppm stability. The ECS-245-20-30B-TR has 20 pF load capacitance versus 16 pF on the LFXTAL026396, and 30 Ohms ESR versus 40 Ohms. Circuit tuning adjustment is required to accommodate the higher load capacitance and lower ESR. All compliance and temperature specifications match.

Q: What is the impact of load capacitance differences?

A: Load capacitance affects the oscillation frequency of the crystal circuit. The crystal is designed to oscillate at its specified frequency when connected to a circuit with the specified load capacitance. Deviations require adjustment of the circuit's tuning capacitors to maintain frequency accuracy within tolerance specifications.

Q: What is the impact of ESR differences?

A: ESR (Equivalent Series Resistance) affects oscillator startup time and power consumption. Lower ESR (30 Ohms) provides faster startup and lower power draw. Higher ESR (40 Ohms) requires more drive current from the oscillator circuit. Both values are within acceptable ranges for standard crystal oscillator designs.

Q: Are all three parts physically interchangeable on the PCB?

A: No. While all three parts use 4-SMD, No Lead surface mount packaging, their physical dimensions differ. The LFXTAL026396 measures 7.00 mm x 5.00 mm, the 406C35B24M57600 measures 6.00 mm x 3.50 mm, and the ECS-245-20-30B-TR measures 5.00 mm x 3.20 mm. PCB footprint compatibility must be verified before substitution.

Q: Do all parts meet RoHS compliance?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference in Moisture Sensitivity Level (MSL)?

A: The LFXTAL026396 has MSL listed as Not Applicable. The 406C35B24M57600 and ECS-245-20-30B-TR both have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. This does not affect substitution eligibility.