ATF1502AS-15AI44 Equivalent & Substitute Parts

Part Overview

The ATF1502AS-15AI44 is a 32-macrocell Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, housed in a 44-pin TQFP surface-mount package. This device features in-system programmability with a maximum propagation delay of 15 nanoseconds and operates across the industrial temperature range of -40°C to 85°C. The ATF1502AS-15AI44 is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs or production continuity.

Substiute Parts

ATF1502AS-15AI44

Microchip TechnologyIn Stock: 888ATF1502AS-15AI44 Datasheet

Current PartRFQ

ATF1502AS-10AU44

Microchip TechnologyIn Stock: 1603ATF1502AS-10AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1502AS-15AI44 is determined by strict equivalence across 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 compatibility with existing designs.
• Package and Pinout: Both parts must use the 44-TQFP (10x10) surface-mount package to ensure PCB-level compatibility without layout modifications.
• Voltage Supply Range: Both parts must operate within 4.5V to 5.5V to maintain compatibility with existing power distribution networks.
• Operating Temperature Range: Both parts must support -40°C to 85°C operation to meet industrial application requirements.
• Programmable Type: Both parts must support in-system programmability with minimum 10K program/erase cycles.

The ATF1502AS-10AU44 meets all substitution criteria. The primary difference is a reduced maximum propagation delay of 10 nanoseconds, which represents improved performance and does not restrict compatibility with designs specified for 15-nanosecond operation.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502AS-10AU44 is the direct substitute for the obsolete ATF1502AS-15AI44. Selection of this substitute is supported by the following factors:

• Product Status: The ATF1502AS-10AU44 maintains active product status, ensuring continued availability and manufacturing support from Microchip Technology.
• Regulatory Compliance: The ATF1502AS-10AU44 is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the original part is non-compliant.
• Performance Improvement: The 10-nanosecond maximum propagation delay of the substitute provides improved timing performance compared to the 15-nanosecond specification of the original part, with no adverse effects on design compatibility.
• Functional Equivalence: Identical macrocell count, I/O configuration, package form factor, voltage supply range, and operating temperature range ensure direct substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502AS-10AU44 be used as a direct replacement for the ATF1502AS-15AI44 without PCB modifications?

A: Yes. Both parts use the identical 44-TQFP (10x10) surface-mount package with the same pinout. No PCB layout changes are required.

Q: Are there timing compatibility concerns when substituting the ATF1502AS-10AU44 for the ATF1502AS-15AI44?

A: No. The ATF1502AS-10AU44 has a maximum propagation delay of 10 nanoseconds, which is faster than the 15-nanosecond specification of the original part. Designs qualified for 15-nanosecond operation will function correctly with the improved timing of the substitute.

Q: What is the difference in packaging between these two parts?

A: The ATF1502AS-15AI44 is supplied in tape and reel packaging, while the ATF1502AS-10AU44 is supplied in tray packaging. Both use the same 44-TQFP (10x10) component package. Packaging format does not affect electrical or mechanical compatibility.

Q: Does the ATF1502AS-10AU44 support the same programming specifications as the ATF1502AS-15AI44?

A: Yes. Both parts support in-system programmability with a minimum of 10,000 program/erase cycles, ensuring equivalent programming capability and reliability.

Q: What are the regulatory compliance differences between these parts?

A: The ATF1502AS-15AI44 is RoHS non-compliant, while the ATF1502AS-10AU44 is ROHS3 compliant. For applications subject to RoHS requirements, the ATF1502AS-10AU44 is the appropriate selection.