ATF1504AS-15AI44 Equivalent & Substitute Parts

Part Overview

The ATF1504AS-15AI44 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, making identification of compatible substitute parts essential for ongoing system support and component procurement.

The ATF1504AS-15AI44 operates within the 4.5V to 5.5V supply voltage range with a maximum propagation delay of 15 nanoseconds. In-system programmability with a minimum of 10,000 program/erase cycles enables field configuration and reprogramming capabilities. Due to its obsolete status, sourcing alternatives from the same product family becomes necessary for design continuity and manufacturing support.

Substiute Parts

ATF1504AS-15AI44

Microchip TechnologyIn Stock: 890ATF1504AS-15AI44 Datasheet

Current PartRFQ

ATF1504AS-10AU44

Microchip TechnologyIn Stock: 1444ATF1504AS-10AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1504AS-15AI44 is determined by strict equivalence across the following critical parameters:

• Macrocell Count: 64 macrocells (functional logic capacity)
• I/O Pin Count: 32 I/O pins (interface capability)
• Package Type: 44-TQFP (physical and electrical compatibility)
• Voltage Supply Range: 4.5V ~ 5.5V (power compatibility)
• Operating Temperature Range: -40°C ~ 85°C (thermal compatibility)
• Programmable Type: In System Programmable with minimum 10K program/erase cycles (field configuration capability)

The ATF1504AS-10AU44 qualifies as a direct substitute based on identical macrocell count, I/O configuration, package type, voltage supply range, operating temperature range, and programmable characteristics. The primary difference is the maximum propagation delay specification (10 ns versus 15 ns), which represents improved performance rather than a limitation for substitution purposes.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504AS-10AU44 is the qualified substitute for the ATF1504AS-15AI44 based on the following engineering criteria:

Product Status: The ATF1504AS-10AU44 maintains active product status, ensuring continued availability and manufacturer support, whereas the ATF1504AS-15AI44 is obsolete.

Compliance: The ATF1504AS-10AU44 is ROHS3 compliant, meeting current environmental and regulatory requirements. The original part is RoHS non-compliant.

Performance: The ATF1504AS-10AU44 provides superior timing performance with a 10 ns maximum propagation delay compared to the 15 ns specification of the original part. This represents a performance improvement suitable for direct substitution in timing-critical applications.

Functional Equivalence: Both devices share identical macrocell count, I/O configuration, package type, voltage supply range, and operating temperature specifications, ensuring functional compatibility at the system level.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504AS-10AU44 directly replace the ATF1504AS-15AI44 in existing designs?

A: Yes. The ATF1504AS-10AU44 is functionally equivalent across all critical parameters: 64 macrocells, 32 I/O pins, 44-TQFP package, 4.5V to 5.5V supply voltage, and -40°C to 85°C operating temperature range. The improved 10 ns propagation delay does not create compatibility issues.

Q: What is the significance of the propagation delay difference between these parts?

A: The ATF1504AS-10AU44 specifies a maximum propagation delay of 10 ns, compared to 15 ns for the ATF1504AS-15AI44. This represents faster logic switching performance. Designs originally specified for 15 ns operation will function correctly with the faster 10 ns device.

Q: Are there packaging differences between these parts?

A: Both devices use the 44-TQFP package with identical 10x10 mm dimensions. The ATF1504AS-10AU44 is supplied in Tray packaging, while the original part does not specify packaging format. Pin configuration and footprint requirements are identical.

Q: What compliance differences exist between these parts?

A: The ATF1504AS-10AU44 is ROHS3 compliant, meeting current environmental regulations. The ATF1504AS-15AI44 is RoHS non-compliant. Both parts are REACH Unaffected and classified under ECCN EAR99.

Q: Is the ATF1504AS-10AU44 programmable in the same manner as the original part?

A: Yes. Both devices support In System Programmable (ISP) configuration with a minimum of 10,000 program/erase cycles, enabling field reprogramming and configuration updates using identical programming procedures and equipment.