ATF1504ASVL-20AI44 Equivalent & Substitute Parts

Part Overview

The ATF1504ASVL-20AI44 is a Complex Programmable Logic Device (CPLD) from Microchip Technology's ATF15xx series, featuring 64 macrocells and 32 I/O pins in a 44-TQFP surface mount package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and production requirements. The part operates with a maximum propagation delay of 20 ns and supports in-system programming with a minimum of 10,000 program/erase cycles.

Substiute Parts

ATF1504ASVL-20AI44

Microchip TechnologyIn Stock: 873ATF1504ASVL-20AI44 Datasheet

Current PartRFQ

ATF1504ASVL-20AU44

Microchip TechnologyIn Stock: 4387ATF1504ASVL-20AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATF1504ASVL-20AI44 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 (20 ns)
• Identical voltage supply range (3V ~ 3.6V)
• 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)

Only parts meeting all these criteria are classified as direct substitutes. Variations in packaging format (tray vs. tube) or product status do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504ASVL-20AU44 is a direct functional equivalent to the ATF1504ASVL-20AI44. Both devices share identical electrical and mechanical specifications across all critical parameters. The primary distinctions are:

• Product Status: The ATF1504ASVL-20AU44 maintains active status, ensuring continued availability and manufacturing support, whereas the ATF1504ASVL-20AI44 is obsolete.
• RoHS Compliance: The ATF1504ASVL-20AU44 is ROHS3 compliant, meeting current environmental regulations. The ATF1504ASVL-20AI44 is non-compliant.
• Packaging Format: The ATF1504ASVL-20AU44 is supplied in tray format, while the ATF1504ASVL-20AI44 is supplied in tube format.

For new designs or production transitions, the ATF1504ASVL-20AU44 is the appropriate selection due to its active product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Are the ATF1504ASVL-20AI44 and ATF1504ASVL-20AU44 pin-compatible?

A: Yes. Both devices use the 44-TQFP package with identical pin assignments, macrocell architecture, and I/O configuration. They are directly interchangeable at the board level.

Q: What is the difference between the packaging formats (tube vs. tray)?

A: Tube and tray are supply formats only and do not affect device functionality. Tube packaging is typically used for lower-volume orders, while tray packaging is standard for higher-volume production runs. The electrical and mechanical specifications remain identical.

Q: Why is the ATF1504ASVL-20AI44 marked as obsolete?

A: Obsolescence indicates that the manufacturer has discontinued production of this specific part number variant. The ATF1504ASVL-20AU44 remains in active production and is the recommended alternative for ongoing applications.

Q: Does RoHS compliance affect functional performance?

A: RoHS compliance relates to material composition and environmental standards, not functional performance. Both variants operate identically within their specified electrical parameters. However, ROHS3 compliance is required for many modern applications and regulatory environments.

Q: Can I use the ATF1504ASVL-20AU44 as a direct replacement in existing designs?

A: Yes. The ATF1504ASVL-20AU44 is a direct substitute with no design modifications required. Existing firmware and board layouts are fully compatible.