ATF1502AS-10AC44 Equivalent & Substitute Parts

Part Overview

The ATF1502AS-10AC44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 32 macrocells and 32 I/O pins in a 44-pin TQFP surface mount package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

The ATF1502AS-10AC44 operates with a 10 ns maximum propagation delay and supports in-system programmability with a minimum of 10,000 program/erase cycles. Due to its obsolete status, sourcing alternatives that maintain functional and electrical compatibility is necessary for design continuity and production support.

Substiute Parts

ATF1502AS-10AC44

Microchip TechnologyIn Stock: 1434ATF1502AS-10AC44 Datasheet

Current PartRFQ

ATF1502AS-10AU44

Microchip TechnologyIn Stock: 1603ATF1502AS-10AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1502AS-10AC44 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 ensure functional compatibility with existing designs.
• Package Type: Both parts must use the 44-TQFP surface mount package to maintain PCB layout and assembly compatibility.
• Programmability: Both parts must support in-system programmability with equivalent or greater program/erase cycle ratings.
• Propagation Delay: Both parts must meet or exceed the 10 ns maximum delay specification.
• Manufacturer: Both parts are manufactured by Microchip Technology, ensuring consistent design and support.

The ATF1502AS-10AU44 meets all substitution criteria as a direct equivalent within the ATF15xx series.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502AS-10AU44 is the direct substitute for the obsolete ATF1502AS-10AC44. Both devices share identical functional specifications, macrocell architecture, I/O configuration, and package geometry.

The ATF1502AS-10AU44 offers additional advantages for new designs and ongoing production:

• Active Product Status: The substitute part is currently in active production, ensuring long-term availability and supply chain stability.
• Enhanced Compliance: The ATF1502AS-10AU44 is ROHS3 compliant, meeting current environmental and regulatory requirements, whereas the main part is RoHS non-compliant.
• Extended Operating Range: The substitute part supports an expanded voltage supply range (4.5V ~ 5.5V versus 4.75V ~ 5.25V) and wider operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C), providing greater design flexibility.

Selection of the ATF1502AS-10AU44 is appropriate for both legacy system support and new product development.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502AS-10AU44 be used as a direct replacement for the ATF1502AS-10AC44?

A: Yes. Both devices are functionally equivalent with identical macrocell count, I/O configuration, propagation delay, package type, and programmability specifications. The ATF1502AS-10AU44 is the active production equivalent.

Q: Are there any PCB layout or assembly differences between these parts?

A: No. Both parts use the 44-TQFP (10x10) surface mount package with identical pin configurations and footprints. Existing PCB designs require no modification.

Q: What is the difference in operating temperature ranges?

A: The ATF1502AS-10AC44 operates from 0°C to 70°C, while the ATF1502AS-10AU44 operates from -40°C to 85°C. The substitute part supports a wider temperature range, suitable for extended environmental conditions.

Q: Does the voltage supply range difference affect compatibility?

A: The ATF1502AS-10AU44 supports a broader voltage supply range (4.5V ~ 5.5V) compared to the main part (4.75V ~ 5.25V). This expanded range provides greater design margin and is fully backward compatible with systems designed for the original part.

Q: What is the significance of the RoHS compliance difference?

A: The ATF1502AS-10AU44 is ROHS3 compliant, meeting current environmental regulations. The original part is RoHS non-compliant. For new designs and regulated markets, the substitute part is the appropriate choice.

Q: Are programming and erase cycle specifications identical?

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