ATF1504AS-10AI44 Equivalent & Substitute Parts

Part Overview

The ATF1504AS-10AI44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 64 macrocells and 32 I/O pins in a 44-pin TQFP package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production requirements. The part operates within the -40°C to 85°C temperature range with a maximum propagation delay of 10 nanoseconds and supports in-system programming with a minimum of 10,000 program/erase cycles.

Substiute Parts

ATF1504AS-10AI44

Microchip TechnologyIn Stock: 941ATF1504AS-10AI44 Datasheet

Current PartRFQ

ATF1504AS-10AU44

Microchip TechnologyIn Stock: 1444ATF1504AS-10AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATF1504AS-10AI44 is determined by strict equivalence across the following critical parameters:

• Identical macrocell count (64 macrocells)
• Identical I/O pin count (32 I/O)
• Identical maximum propagation delay (10 ns)
• Identical voltage supply range (4.5V ~ 5.5V)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package type (44-TQFP)
• Identical programmable type and cycle rating (In System Programmable, min 10K cycles)
• Same manufacturer (Microchip Technology)
• Same series (ATF15xx)

The ATF1504AS-10AU44 meets all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504AS-10AU44 is the direct functional equivalent of the ATF1504AS-10AI44. Both devices share identical electrical and mechanical specifications, including macrocell count, I/O configuration, timing characteristics, voltage supply requirements, and operating temperature range.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The ATF1504AS-10AI44 is classified as obsolete, while the ATF1504AS-10AU44 maintains active product status. Additionally, the ATF1504AS-10AU44 is ROHS3 compliant, whereas the main part is RoHS non-compliant. The substitute part is supplied in tray packaging.

For new designs or production continuity, the ATF1504AS-10AU44 is the appropriate selection due to its active status and improved regulatory compliance posture.

Frequently Asked Questions (FAQ)

Q: Are the ATF1504AS-10AI44 and ATF1504AS-10AU44 pin-compatible?

A: Yes. Both devices use the 44-TQFP package with identical pin assignments, macrocell architecture, and I/O configuration. Direct PCB-level substitution is supported.

Q: What is the difference between the -10AI44 and -10AU44 suffixes?

A: The suffix designates packaging format. The -10AI44 uses standard packaging, while the -10AU44 is supplied in tray packaging. The electrical and functional specifications remain identical.

Q: Can I use the ATF1504AS-10AU44 in place of the obsolete ATF1504AS-10AI44?

A: Yes. The ATF1504AS-10AU44 is a direct substitute with identical electrical performance, timing characteristics, and programmable functionality. The substitute part is recommended for new production due to active product status.

Q: Are there compliance differences between these parts?

A: The ATF1504AS-10AU44 is ROHS3 compliant, while the ATF1504AS-10AI44 is RoHS non-compliant. Both parts are REACH unaffected and classified under ECCN EAR99.

Q: What is the minimum programming cycle rating for these devices?

A: Both the ATF1504AS-10AI44 and ATF1504AS-10AU44 support in-system programming with a minimum of 10,000 program/erase cycles, ensuring adequate endurance for development and field reprogramming applications.