LFXTAL033265 Equivalent & Substitute Parts

Part Overview

The LFXTAL033265 is a 20 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products. This surface mount device is specified for 18pF load capacitance with 40 Ohms equivalent series resistance (ESR) and operates across a temperature range of -10°C to 60°C. The component is supplied in 4-SMD, No Lead packaging with dimensions of 5.00mm × 3.20mm and a maximum seated height of 1.00mm. The part maintains Active product status and carries ROHS3 compliance certification. Substitute parts are identified when equivalent frequency, stability, and operating characteristics are required but alternative load capacitance or ESR specifications are acceptable within system design parameters.

Substiute Parts

LFXTAL033265

IQD Frequency ProductsIn Stock: 965LFXTAL033265 Datasheet

Current PartRFQ

LFXTAL035265

IQD Frequency ProductsIn Stock: 1615LFXTAL035265 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFXTAL033265 is determined by matching the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 20.0000 MHz
• Frequency Stability: ±50 ppm
• Frequency Tolerance: ±50 ppm
• Operating Mode: Fundamental
• Operating Temperature Range: -10°C to 60°C
• Mounting Type: Surface Mount
• Package / Case: 4-SMD, No Lead
• RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

• Load Capacitance: Alternative values acceptable if circuit design accommodates load capacitance adjustment
• ESR (Equivalent Series Resistance): Alternative values acceptable within circuit drive level specifications
• Physical Dimensions: Smaller footprints acceptable; larger footprints require board layout verification

The LFXTAL035265 qualifies as a substitute part because it maintains identical frequency, stability, tolerance, operating mode, temperature range, mounting type, package configuration, and compliance status. Variations in load capacitance (16pF versus 18pF) and ESR (50 Ohms versus 40 Ohms) require circuit-level validation but do not preclude substitution in applications with appropriate design margins.

Parameter Comparison

Engineering Selection Recommendations

LFXTAL033265 Primary Selection: Select the LFXTAL033265 when the circuit design specifies 18pF load capacitance and 40 Ohms ESR. This part is the original specification and carries full design validation. The larger footprint (5.00mm × 3.20mm) accommodates standard PCB layout practices.

LFXTAL035265 Substitute Selection: The LFXTAL035265 is suitable for applications where load capacitance adjustment to 16pF and ESR tolerance to 50 Ohms are acceptable. The reduced physical dimensions (3.20mm × 2.50mm) and lower profile (0.80mm) provide space optimization benefits for compact board designs. Both parts maintain identical frequency, stability, temperature range, and compliance certifications. Selection between these parts depends on circuit design accommodation of load capacitance and ESR variations, not on compliance or reliability factors.

Inventory Consideration: The LFXTAL035265 maintains higher inventory availability (1546 Pcs) compared to the LFXTAL033265 (944 Pcs), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the LFXTAL035265 directly replace the LFXTAL033265 without circuit modification?

A: Direct replacement depends on circuit design tolerance for load capacitance and ESR variation. The LFXTAL035265 specifies 16pF load capacitance versus 18pF for the LFXTAL033265, and 50 Ohms ESR versus 40 Ohms. Circuits designed with load capacitance tuning networks or with ESR margin specifications accommodate this substitution. Circuits with fixed load capacitance requirements or tight ESR specifications require design review.

Q: Are there physical compatibility concerns when substituting the LFXTAL035265?

A: The LFXTAL035265 features a smaller footprint (3.20mm × 2.50mm versus 5.00mm × 3.20mm) and lower profile (0.80mm versus 1.00mm). These dimensions are compatible with standard 4-SMD, No Lead solder pads. The reduced size may require PCB layout verification to confirm adequate clearance and solder joint formation, but no mechanical incompatibility exists.

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

A: Both the LFXTAL033265 and LFXTAL035265 carry identical ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification. No compliance or regulatory differentiation exists between these parts.

Q: What is the primary technical difference between these two 20 MHz crystals?

A: The primary technical differences are load capacitance (18pF versus 16pF) and ESR (40 Ohms versus 50 Ohms). Both parts maintain identical frequency, stability, tolerance, operating temperature range, and operating mode. The load capacitance difference affects circuit tuning and frequency accuracy; the ESR difference affects drive level requirements and power consumption.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable based on circuit requirements. If load capacitance and ESR specifications are flexible, the LFXTAL035265 offers space optimization and higher inventory availability. If the design specifies 18pF load capacitance and 40 Ohms ESR, the LFXTAL033265 is the appropriate selection.

Q: Are there temperature or frequency stability differences between these parts?

A: No. Both parts operate across -10°C to 60°C and maintain ±50 ppm frequency stability and tolerance. Temperature performance and frequency accuracy are identical.