LFXTAL056463 Equivalent & Substitute Parts Reference

Part Overview

The LFXTAL056463 is a 25 MHz surface mount crystal oscillator manufactured by IQD Frequency Products. This HC-49/US package crystal operates at fundamental mode with 18pF load capacitance and 40 Ohms equivalent series resistance. The component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical parameters and mechanical compatibility are maintained across the HC-49/US package family, enabling direct replacement in circuit applications where frequency, load capacitance, and operating temperature specifications align.

Substiute Parts

LFXTAL056463

IQD Frequency ProductsIn Stock: 1161LFXTAL056463 Datasheet

Current PartRFQ

ATS250BSM-1E

CTS-Frequency ControlsIn Stock: 34168ATS250BSM-1E Datasheet

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ATS25ASM-1E

CTS-Frequency ControlsIn Stock: 26364ATS25ASM-1E Datasheet

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E1SFA18-25.000M TR

EcliptekIn Stock: 6128E1SFA18-25.000M TR Datasheet

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ECS-250-20-3X-EN-TR

ECS Inc.In Stock: 19702ECS-250-20-3X-EN-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LFXTAL056463 is determined by strict alignment of the following parameters:

Primary Substitution Criteria:

• Frequency: 25.0000 MHz (exact match required)
• Frequency Tolerance: ±30 ppm (exact match required)
• Operating Temperature Range: -40°C to 85°C (exact match required)
• Package / Case: HC-49/US (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Mode: Fundamental (exact match required)

Secondary Compatibility Parameters:

• Load Capacitance: 18 pF or 20 pF (within acceptable circuit design tolerance)
• ESR: 30 to 50 Ohms (within acceptable circuit design tolerance)
• RoHS Status: ROHS3 Compliant (compliance requirement)

All identified substitute parts meet the primary criteria. Load capacitance and ESR variations are noted as they may require circuit verification depending on application-specific impedance matching and oscillator design parameters.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity.

ATS250BSM-1E (CTS-Frequency Controls): Exact match for load capacitance (18 pF) with lower ESR (30 Ohms versus 40 Ohms). Suitable for applications where reduced series resistance improves oscillator startup characteristics. Available in Tape & Reel packaging.

ATS25ASM-1E (CTS-Frequency Controls): Load capacitance of 20 pF with 30 Ohms ESR. Circuit design verification required if load capacitance tolerance is critical. Available in Cut Tape and Digi-Reel® packaging formats.

E1SFA18-25.000M TR (Ecliptek): Exact match for load capacitance (18 pF) and ESR (40 Ohms). Dimensional variation noted: height-seated maximum of 3.20 mm versus 4.30 mm. Suitable for space-constrained applications. Available in Tape & Reel packaging.

ECS-250-20-3X-EN-TR (ECS Inc.): Load capacitance of 20 pF with higher ESR (50 Ohms). Smallest physical footprint (7.00 mm length, 2.30 mm height). Circuit design verification required for load capacitance and ESR tolerance. Available in Tape & Reel packaging.

Frequently Asked Questions (FAQ)

Q: Can ATS250BSM-1E replace LFXTAL056463 directly? A: Yes. Both parts share identical frequency (25 MHz), frequency tolerance (±30 ppm), load capacitance (18 pF), and operating temperature range (-40 to 85°C). The lower ESR (30 Ohms) may improve oscillator performance in some circuit topologies.

Q: What is the difference between ATS25ASM-1E and ATS250BSM-1E? A: Load capacitance differs: ATS25ASM-1E is 20 pF while ATS250BSM-1E is 18 pF. Both have 30 Ohms ESR. Packaging format also differs: ATS25ASM-1E is available in Cut Tape and Digi-Reel®, while ATS250BSM-1E is Tape & Reel only.

Q: Why does E1SFA18-25.000M TR have a different height? A: E1SFA18-25.000M TR has a height-seated maximum of 3.20 mm compared to 4.30 mm for LFXTAL056463. This is a dimensional variation within the HC-49/US package family. Verify PCB layout clearance before substitution.

Q: Can I use ECS-250-20-3X-EN-TR as a substitute? A: ECS-250-20-3X-EN-TR meets all primary substitution criteria. However, load capacitance is 20 pF (versus 18 pF) and ESR is 50 Ohms (versus 40 Ohms). Circuit design verification is required to confirm oscillator stability and frequency accuracy with these parameter variations.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitute parts are ROHS3 compliant, matching the compliance status of LFXTAL056463.

Q: What packaging formats are available? A: LFXTAL056463, ATS250BSM-1E, E1SFA18-25.000M TR, and ECS-250-20-3X-EN-TR are supplied in Tape & Reel (TR) format. ATS25ASM-1E is available in Cut Tape (CT) and Digi-Reel® format.

Q: Do all substitute parts operate at the same temperature range? A: Yes. All substitute parts operate across the identical temperature range of -40°C to 85°C.