ATF1502ASL-25AC44 Equivalent & Substitute Parts

Part Overview

The ATF1502ASL-25AC44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 32 macrocells and 32 I/O pins in a 44-TQFP surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement. The ATF15xx series provides in-system programmable logic solutions suitable for embedded applications requiring deterministic timing performance.

Substiute Parts

ATF1502ASL-25AC44

Microchip TechnologyIn Stock: 4940ATF1502ASL-25AC44 Datasheet

Current PartRFQ

ATF1502ASL-25AU44

Microchip TechnologyIn Stock: 2073ATF1502ASL-25AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1502ASL-25AC44 is determined by the following critical parameters:

• Macrocell and I/O Count: Both main and substitute parts must provide 32 macrocells and 32 I/O pins to maintain functional equivalence in logic density and pin configuration.
• Propagation Delay: Maximum delay time of 25 ns ensures timing-critical applications maintain specified performance characteristics.
• Package Compatibility: 44-TQFP surface mount package with identical 10x10mm footprint enables direct PCB layout compatibility.
• Programmable Architecture: In-system programmable capability with minimum 10K program/erase cycles supports field reprogramming requirements.
• Moisture Sensitivity: MSL rating of 3 (168 Hours) defines storage and handling requirements.

The ATF1502ASL-25AU44 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502ASL-25AU44 is the qualified substitute for the obsolete ATF1502ASL-25AC44. Selection of this substitute is supported by:

• Product Status: The substitute maintains active product status with ongoing manufacturer support, addressing the obsolescence of the original part.
• Compliance Certifications: ROHS3 compliance of the substitute meets current regulatory requirements, whereas the original part is non-compliant.
• Electrical Compatibility: Identical macrocell count, I/O configuration, and propagation delay ensure functional equivalence in logic implementation and timing performance.
• Package Compatibility: Identical 44-TQFP footprint enables direct replacement without PCB redesign.
• Extended Operating Range: The substitute provides wider voltage supply tolerance (4.5V ~ 5.5V versus 4.75V ~ 5.25V) and extended temperature range (-40°C ~ 85°C versus 0°C ~ 70°C), supporting broader application environments.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502ASL-25AU44 be used as a direct replacement for the ATF1502ASL-25AC44 in existing designs?

A: Yes. Both devices share identical macrocell count (32), I/O pin count (32), propagation delay (25 ns maximum), and 44-TQFP package footprint. The substitute is electrically and mechanically compatible for direct PCB replacement.

Q: What are the key differences between these two parts?

A: The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), voltage supply range (4.75V–5.25V versus 4.5V–5.5V), and operating temperature range (0°C–70°C versus -40°C–85°C). The substitute offers improved compliance and extended operating specifications.

Q: Are there any programming or configuration differences between these parts?

A: Both devices support in-system programmable functionality with identical minimum program/erase cycle ratings (10K cycles). Programming methodology and configuration procedures remain consistent between the two parts.

Q: Does the wider operating temperature range of the substitute affect compatibility?

A: No. The extended temperature range of the substitute (-40°C to 85°C) encompasses the original part's range (0°C to 70°C). Applications designed for the original temperature specification will operate within the substitute's qualified range.

Q: What is the significance of the packaging designation change from -AC44 to -AU44?

A: The packaging suffix indicates different manufacturing batches and compliance certifications. Both maintain identical 44-TQFP physical specifications and pin configurations. The -AU44 variant reflects current production standards and RoHS3 compliance.