LFXTAL065111 Equivalent & Substitute Parts

Part Overview

The LFXTAL065111 is a 12 MHz fundamental mode crystal oscillator manufactured by IQD Frequency Products. This surface mount device is specified for 18pF load capacitance with 90 Ohms equivalent series resistance (ESR) and operates across the -20°C to 70°C temperature range. The component is actively produced and ROHS3 compliant, making it suitable for modern electronic applications requiring stable frequency reference signals. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling supply chain flexibility and inventory optimization.

Substiute Parts

LFXTAL065111

IQD Frequency ProductsIn Stock: 1048LFXTAL065111 Datasheet

Current PartRFQ

ECS-120-20-33-TR

ECS Inc.In Stock: 22330ECS-120-20-33-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LFXTAL065111 is permissible when the alternative component meets the following criteria:

Mandatory Matching Parameters:

• Frequency: 12.0000 MHz
• Frequency Stability: ±50 ppm
• Frequency Tolerance: ±50 ppm
• Operating Mode: Fundamental
• Operating Temperature Range: -20°C to 70°C
• Mounting Type: Surface Mount
• Package Type: 4-SMD, No Lead
• Packaging Format: Tape & Reel (TR)
• RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

• Load Capacitance: Substitutes with 20pF are acceptable within the specified electrical operating window
• ESR (Equivalent Series Resistance): Substitutes with 100 Ohms are acceptable within the specified electrical operating window
• Physical dimensions: Minor variations permitted provided the component fits within the 4-SMD, No Lead footprint envelope

The ECS-120-20-33-TR meets all mandatory parameters and operates within allowable variation limits for load capacitance and ESR.

Parameter Comparison

Engineering Selection Recommendations

Both the LFXTAL065111 and ECS-120-20-33-TR are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The LFXTAL065111 (IQD Frequency Products) is specified with 18pF load capacitance and 90 Ohms ESR. Current inventory availability is 973 pieces.

The ECS-120-20-33-TR (ECS Inc.) is specified with 20pF load capacitance and 100 Ohms ESR. Current inventory availability is 22,290 pieces.

Selection between these components is determined by application-specific circuit design requirements regarding load capacitance and ESR tolerance, as well as supply chain availability and lead time considerations. Both components share identical frequency, stability, operating temperature range, package type, and regulatory compliance status.

Frequently Asked Questions (FAQ)

Q: Can the ECS-120-20-33-TR directly replace the LFXTAL065111 in my circuit?

A: Direct replacement is permissible if your circuit design accommodates the 20pF load capacitance specification (versus 18pF) and 100 Ohms ESR (versus 90 Ohms). The frequency, stability, temperature range, and package footprint are identical. Circuit simulation or testing may be required to confirm performance within your specific application parameters.

Q: What is the significance of the load capacitance difference between these parts?

A: Load capacitance affects the crystal's operating frequency in the context of the circuit's total capacitive load. The 2pF difference between 18pF and 20pF represents a variation that must be evaluated within your oscillator circuit design. This parameter is typically compensated through circuit-level capacitive tuning networks.

Q: Are the physical dimensions compatible between these two parts?

A: Both components use the 4-SMD, No Lead package type. The LFXTAL065111 measures 5.00mm × 3.20mm with 1.00mm maximum seated height. The ECS-120-20-33-TR measures 3.20mm × 2.50mm with 0.80mm maximum seated height. Both fit within standard 4-SMD footprints, though the ECS part is physically smaller. PCB layout compatibility depends on your specific footprint design.

Q: Do both parts meet current regulatory compliance requirements?

A: Yes. Both the LFXTAL065111 and ECS-120-20-33-TR are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and deployment in regulated markets.

Q: What is the difference in ESR between these components?

A: The LFXTAL065111 specifies 90 Ohms ESR, while the ECS-120-20-33-TR specifies 100 Ohms ESR. ESR affects the crystal's power dissipation and startup characteristics. The 10 Ohm difference is within acceptable variation for fundamental mode crystals at this frequency and may require circuit-level evaluation depending on your oscillator design specifications.

Q: Which part should I select based on availability?

A: The ECS-120-20-33-TR currently has significantly higher inventory availability (22,290 pieces) compared to the LFXTAL065111 (973 pieces). If supply chain continuity is a priority and your circuit design accommodates the specified load capacitance and ESR parameters, the ECS part provides greater availability assurance.