LFXTAL071270 Equivalent & Substitute Parts Reference

Part Overview

The LFXTAL071270 is a 25 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products, designed for surface mount applications in the CFPX-218 AUTO series. This active product features a 10pF load capacitance, 100 Ohms equivalent series resistance, and operates across the -40°C to 125°C temperature range with AEC-Q200 automotive qualification. The component is ROHS3 compliant and suitable for precision timing applications requiring ±10ppm frequency tolerance. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling component interchangeability in circuit designs.

Substiute Parts

LFXTAL071270

IQD Frequency ProductsIn Stock: 3094LFXTAL071270 Datasheet

Current PartRFQ

LFXTAL071259

IQD Frequency ProductsIn Stock: 9271LFXTAL071259 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LFXTAL071270 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match Exactly):

• Frequency: 25.0000 MHz
• Frequency Tolerance: ±10 ppm
• Load Capacitance: 10 pF
• Equivalent Series Resistance: 100 Ohms
• Operating Mode: Fundamental

Mechanical Parameters (Must Match Exactly):

• Package Type: 4-SMD, No Lead
• Mounting Type: Surface Mount

Environmental & Compliance Parameters (Must Match or Exceed):

• Operating Temperature Range: -40°C to 125°C (minimum)
• AEC-Q200 Automotive Qualification
• RoHS3 Compliance

The LFXTAL071259 qualifies as a direct substitute because all electrical parameters, operating mode, temperature range, and compliance certifications are identical. Physical dimensions vary (LFXTAL071259 is smaller), but both components share the same 4-SMD, No Lead package classification and surface mount configuration, permitting direct PCB placement substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the LFXTAL071270 and LFXTAL071259 are active products from IQD Frequency Products with identical electrical specifications, operating parameters, and compliance certifications. Selection between these components is based on the following engineering criteria:

LFXTAL071270 Selection:

• Applications requiring the larger 2.50mm × 2.00mm footprint
• Designs with PCB layout constraints favoring the 0.60mm maximum seated height
• CFPX-218 AUTO series integration

LFXTAL071259 Selection:

• Space-constrained applications benefiting from the compact 2.00mm × 1.60mm footprint
• Designs optimized for the 0.50mm maximum seated height
• IQXC-42 AUTO series integration

Both components satisfy AEC-Q200 automotive qualification and ROHS3 compliance requirements. Electrical performance, frequency accuracy, temperature stability, and load capacitance characteristics are functionally equivalent. The decision between these parts depends solely on available PCB real estate and mechanical clearance constraints, as all electrical and thermal operating parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can LFXTAL071259 replace LFXTAL071270 in existing designs?

A: Yes, from an electrical standpoint. The LFXTAL071259 provides identical frequency, tolerance, load capacitance, ESR, and operating temperature range. However, the smaller physical dimensions (2.00mm × 1.60mm versus 2.50mm × 2.00mm) must be verified against PCB footprint and layout constraints before implementation.

Q: Are there differences in frequency accuracy between these parts?

A: No. Both components specify ±10ppm frequency tolerance and ±100ppm frequency stability. Frequency performance is equivalent.

Q: Do both parts meet automotive standards?

A: Yes. Both LFXTAL071270 and LFXTAL071259 carry AEC-Q200 automotive qualification and are ROHS3 compliant.

Q: What is the significance of the different package dimensions?

A: While both use the 4-SMD, No Lead package classification, the LFXTAL071259 is physically smaller. This affects PCB footprint area and component placement density. The LFXTAL071270 has a maximum seated height of 0.60mm, while the LFXTAL071259 is 0.50mm. Verify clearance requirements for your specific application.

Q: Can these parts be used interchangeably in the same circuit?

A: Electrically, yes. Both provide 25 MHz at 10pF load capacitance with 100 Ohms ESR. Mechanically, substitution requires confirmation that the smaller LFXTAL071259 footprint fits the existing PCB design, or that the larger LFXTAL071270 fits within available space if upgrading from the smaller part.

Q: What is the load capacitance specification used for?

A: Load capacitance (10pF for both parts) specifies the external capacitive load the crystal oscillator circuit must present for the component to operate at the specified frequency and tolerance. Circuit design must match this parameter.

Q: Are there inventory considerations for substitution?

A: Yes. LFXTAL071259 has 9222 pieces in stock, while LFXTAL071270 has 3018 pieces available. Availability may influence component selection for high-volume production.