ASFL-4.000MHZ Oscillator Equivalent & Substitute Parts

Part Overview

The ASFL-4.000MHZ is a 4 MHz oscillator manufactured by Abracon LLC, classified as an XO (Standard) oscillator with crystal base resonator. This part is currently listed as Obsolete and no longer in active production. Due to its obsolete status, sourcing original inventory becomes increasingly difficult, making identification of functionally equivalent active alternatives essential for ongoing system support and new design implementations.

The substitute part ASFL1-4.000MHZ-L-T represents the active production equivalent within the Abracon oscillator product line, maintaining the same core frequency specification while incorporating modern packaging and compliance standards.

Substiute Parts

ASFL-4.000MHZ

Abracon LLCIn Stock: 756ASFL-4.000MHZ Datasheet

Current PartRFQ

ASFL1-4.000MHZ-L-T

Abracon LLCIn Stock: 944ASFL1-4.000MHZ-L-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete ASFL-4.000MHZ is determined by the following critical parameters:

Primary Substitution Criteria:

• Frequency Match: 4.000 MHz (exact match required)
• Manufacturer Consistency: Abracon LLC (maintains supply chain continuity)
• Product Status: Active production status (ensures ongoing availability)
• Compliance Alignment: ROHS3 Compliant and REACH Unaffected (regulatory requirement match)
• Moisture Sensitivity Level: MSL 1 (Unlimited) (storage and handling compatibility)

The ASFL1-4.000MHZ-L-T qualifies as a direct substitute based on these parameters. It maintains the identical 4 MHz frequency specification, originates from the same manufacturer, holds active product status, and meets all environmental and regulatory compliance requirements specified for the original part.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: ASFL1-4.000MHZ-L-T

This part is the direct active production equivalent of the obsolete ASFL-4.000MHZ. Selection is based on:

1. Frequency Specification: Maintains exact 4.000 MHz frequency match, ensuring functional equivalence in timing-critical applications.

2. Manufacturer Continuity: Sourced from Abracon LLC, the original manufacturer, ensuring design consistency and supply chain reliability.

3. Compliance Status: Holds active product status with ROHS3 Compliant and REACH Unaffected certifications, meeting current regulatory requirements for both new designs and legacy system support.

4. Moisture Sensitivity Alignment: MSL 1 (Unlimited) classification matches the original part, ensuring compatibility with existing handling, storage, and assembly procedures.

5. Production Availability: Active status with documented inventory (892 Pcs New Original In Stock) provides reliable sourcing for immediate and ongoing requirements.

For applications requiring alternative output configurations or functional parameters beyond frequency specification, the ASFL1 series includes additional variants (ASFL1-4.000MHZ-EK-T, ASFL1-4.000MHZ-EC-T) within the same product line.

Frequently Asked Questions (FAQ)

Q: Why is the ASFL-4.000MHZ listed as obsolete?

A: The ASFL-4.000MHZ has been discontinued by Abracon LLC. The ASFL1-4.000MHZ-L-T represents the current production equivalent within the manufacturer's active oscillator portfolio.

Q: What are the critical parameters for substitution?

A: The primary substitution criteria are frequency (4.000 MHz), manufacturer (Abracon LLC), product status (active production), and compliance certifications (ROHS3 Compliant, REACH Unaffected, MSL 1). All these parameters must align for functional equivalence.

Q: Is the ASFL1-4.000MHZ-L-T a direct pin-for-pin replacement?

A: Both parts are specified as 4-SMD, No Lead surface mount packages. The ASFL1-4.000MHZ-L-T is the active production equivalent. Verify specific PCB footprint requirements against the detailed package dimensions provided in the substitute part datasheet.

Q: What is the difference between the ASFL-4.000MHZ and ASFL1-4.000MHZ-L-T?

A: The primary difference is product status: the original is obsolete, while the ASFL1 variant is in active production. Both maintain the 4.000 MHz frequency specification and identical compliance certifications. The ASFL1 series incorporates current manufacturing standards and packaging formats (Tape & Reel).

Q: Are there other 4 MHz oscillator options from Abracon?

A: Within the ASFL1 series, variants ASFL1-4.000MHZ-EK-T and ASFL1-4.000MHZ-EC-T are available. These maintain the 4.000 MHz frequency while offering different output configurations or functional parameters. Consult detailed specifications for application-specific requirements.

Q: What is MSL 1 (Unlimited) and why does it matter?

A: Moisture Sensitivity Level (MSL) 1 (Unlimited) indicates the component has unlimited shelf life under standard storage conditions without requiring baking or special moisture control procedures. This classification ensures compatibility with standard assembly and storage practices.

Q: Is the ASFL1-4.000MHZ-L-T RoHS compliant?

A: Yes, the ASFL1-4.000MHZ-L-T is ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements for both EU and global markets.