ATF1502ASL-25AI44 Equivalent & Substitute Parts

Part Overview

The ATF1502ASL-25AI44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 32 macrocells and 32 I/O pins with a maximum propagation delay of 25 nanoseconds. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement requirements. The part operates within the 4.5V to 5.5V supply range and is housed in a 44-pin TQFP surface mount package.

Substiute Parts

ATF1502ASL-25AI44

Microchip TechnologyIn Stock: 2371ATF1502ASL-25AI44 Datasheet

Current PartRFQ

ATF1502ASL-25AU44

Microchip TechnologyIn Stock: 2073ATF1502ASL-25AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATF1502ASL-25AI44 is determined by strict equivalence across the following critical parameters:

• Identical macrocell count (32 macrocells)
• Identical I/O pin count (32 pins)
• Matching propagation delay specification (25 ns maximum)
• Identical supply voltage range (4.5V ~ 5.5V)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical package type and pin configuration (44-TQFP)
• Identical programmable type and cycle rating (In System Programmable, min 10K cycles)
• Identical moisture sensitivity level (MSL 3)

The ATF1502ASL-25AU44 meets all substitution criteria as a direct functional equivalent within the ATF15xx series.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502ASL-25AU44 is the direct substitute for the obsolete ATF1502ASL-25AI44. Both devices are electrically and mechanically identical across all functional parameters. The primary distinction is product status: the ATF1502ASL-25AU44 is active and available for procurement, while the ATF1502ASL-25AI44 is obsolete.

The ATF1502ASL-25AU44 offers additional compliance advantages, meeting ROHS3 requirements compared to the non-compliant status of the original part. This substitution requires no design modifications and maintains full functional compatibility for in-system programmable CPLD applications requiring 32 macrocells and 32 I/O pins within the specified timing and voltage parameters.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502ASL-25AU44 be used as a direct replacement for the ATF1502ASL-25AI44?

A: Yes. Both devices share identical electrical and mechanical specifications across all critical parameters including macrocell count, I/O configuration, propagation delay, supply voltage, operating temperature range, package type, and programmable characteristics.

Q: What is the difference between the ATF1502ASL-25AI44 and ATF1502ASL-25AU44?

A: The devices are functionally equivalent. The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), and packaging format (unspecified versus tray). No electrical or timing differences exist.

Q: Are there any design considerations when substituting these parts?

A: No design modifications are required. The ATF1502ASL-25AU44 maintains full pin-for-pin and functional compatibility with the ATF1502ASL-25AI44. Existing firmware and programming configurations are directly compatible.

Q: What is the package configuration for both parts?

A: Both the ATF1502ASL-25AI44 and ATF1502ASL-25AU44 are housed in a 44-pin TQFP surface mount package with 10x10 millimeter dimensions. Pin assignments and footprints are identical.

Q: Are there moisture sensitivity considerations for these parts?

A: Both devices carry an MSL rating of 3 with a 168-hour floor life. Standard moisture control procedures for MSL 3 components apply to both parts during storage and handling.