ATF1504ASVL-20AC44 Equivalent & Substitute Parts

Part Overview

The ATF1504ASVL-20AC44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, 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 active equivalent parts for ongoing design support and procurement continuity. The ATF15xx series remains widely used in legacy systems and new designs requiring in-system programmable logic solutions with 20 nanosecond propagation delay specifications.

Substiute Parts

ATF1504ASVL-20AC44

Microchip TechnologyIn Stock: 2018ATF1504ASVL-20AC44 Datasheet

Current PartRFQ

ATF1504ASVL-20AU44

Microchip TechnologyIn Stock: 4387ATF1504ASVL-20AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1504ASVL-20AC44 is determined by strict equivalence across the following critical parameters:

• Identical macrocell count (64 macrocells)
• Identical I/O pin count (32 pins)
• Identical propagation delay specification (20 ns maximum)
• Identical voltage supply range (3V ~ 3.6V)
• Identical package type and pin configuration (44-TQFP)
• Identical programmable architecture (In System Programmable)

The ATF1504ASVL-20AU44 meets all substitution criteria. The primary distinction is product status and operating temperature range, which affects suitability for different application environments.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504ASVL-20AU44 is the direct functional equivalent of the ATF1504ASVL-20AC44. Selection between these parts is determined by application requirements:

ATF1504ASVL-20AU44 is preferred for new designs and procurement due to active product status, extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), and ROHS3 compliance. This part supports industrial and extended-temperature applications while maintaining full electrical and functional compatibility.

ATF1504ASVL-20AC44 remains suitable for existing designs operating within the 0°C to 70°C temperature range where RoHS compliance is not a requirement. However, given obsolete status, long-term availability is not assured.

Both parts share identical core specifications: 64 macrocells, 32 I/O pins, 20 nanosecond propagation delay, 3V to 3.6V supply voltage, and 44-TQFP package configuration.

Frequently Asked Questions (FAQ)

Q: Can ATF1504ASVL-20AU44 replace ATF1504ASVL-20AC44 in existing designs?

A: Yes. Both devices are electrically and functionally identical across all core parameters: macrocell count, I/O configuration, propagation delay, supply voltage, and package type. The substitute part operates across a wider temperature range (-40°C to 85°C) and is RoHS3 compliant, making it suitable for the original application environment.

Q: What is the difference between the two part numbers?

A: The suffix designations indicate packaging format (Tube versus Tray) and product lifecycle status. The ATF1504ASVL-20AU44 is an active product with extended temperature specifications, while the ATF1504ASVL-20AC44 is obsolete. Electrical performance is identical.

Q: Are there any compatibility concerns with the 44-TQFP package?

A: No. Both parts use identical 44-TQFP (10x10) surface mount packaging with the same pin configuration, footprint, and mechanical dimensions. PCB layouts and assembly processes require no modification.

Q: Does the extended temperature range of ATF1504ASVL-20AU44 affect performance?

A: No. The extended operating range (-40°C to 85°C) represents a broader specification envelope. Performance within the original 0°C to 70°C range remains identical to the ATF1504ASVL-20AC44.

Q: What is the significance of RoHS3 compliance?

A: ROHS3 compliance indicates the ATF1504ASVL-20AU44 meets current environmental and hazardous substance restrictions. This is relevant for applications subject to regulatory compliance requirements or customer specifications mandating RoHS-compliant components.