ATF1500A-15AI Equivalent & Substitute Parts

Part Overview

The ATF1500A-15AI is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 32 macrocells and 32 I/O pins in a 44-TQFP surface mount package. This device is classified as obsolete, which necessitates identification of functionally compatible alternatives for ongoing design support and production requirements. The ATF1500A-15AI operates with a maximum propagation delay of 15 nanoseconds and supports in-system programming with a minimum of 100 program/erase cycles.

Substiute Parts

ATF1500A-15AI

Microchip TechnologyIn Stock: 1120ATF1500A-15AI Datasheet

Current PartRFQ

ATF1500A-10AU

Microchip TechnologyIn Stock: 1637ATF1500A-10AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ATF1500A-15AI is determined by the following critical parameters:

• Macrocell and I/O Count: Must match 32 macrocells and 32 I/O pins to ensure functional equivalence
• Package Type: Must be 44-TQFP (10x10) surface mount for PCB compatibility
• Voltage Supply Range: Must support 4.5V ~ 5.5V internal supply
• Operating Temperature Range: Must support -40°C ~ 85°C (TA)
• Programmable Type: Must support In System Programmable functionality
• Series Compatibility: Must belong to the ATF15xx series

The ATF1500A-10AU meets all substitution criteria. This device shares identical macrocell architecture, I/O configuration, package specifications, voltage requirements, and temperature range. The primary difference is the propagation delay specification, where the ATF1500A-10AU provides superior performance at 10 nanoseconds maximum delay compared to the 15 nanosecond specification of the main part.

Parameter Comparison

Engineering Selection Recommendations

The ATF1500A-10AU is the direct substitute for the obsolete ATF1500A-15AI. Selection of this alternative is supported by the following factors:

• Product Status: The ATF1500A-10AU maintains active product status, ensuring continued availability and manufacturing support
• Regulatory Compliance: The ATF1500A-10AU is ROHS3 compliant, whereas the main part is non-compliant, providing improved environmental and regulatory alignment
• Performance Enhancement: The ATF1500A-10AU delivers improved timing performance with a 10 nanosecond maximum propagation delay, which is a performance upgrade relative to the 15 nanosecond specification
• Functional Compatibility: Identical macrocell count, I/O configuration, package type, voltage supply range, and operating temperature range ensure direct functional substitution without design modification

Frequently Asked Questions (FAQ)

Q: Can the ATF1500A-10AU be used as a direct replacement for the ATF1500A-15AI?

A: Yes. Both devices share identical macrocell architecture (32 macrocells), I/O pin count (32 pins), package specification (44-TQFP 10x10), voltage supply range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). The ATF1500A-10AU provides superior propagation delay performance at 10 nanoseconds versus 15 nanoseconds.

Q: Are there any package compatibility concerns?

A: No. Both parts use the 44-TQFP (10x10) surface mount package. PCB footprints, land patterns, and mounting procedures are identical.

Q: What is the significance of the propagation delay difference?

A: The ATF1500A-10AU specifies a maximum propagation delay of 10 nanoseconds, compared to 15 nanoseconds for the ATF1500A-15AI. This represents improved timing performance and allows operation in applications with tighter timing constraints.

Q: Does the ATF1500A-10AU support the same programming methodology?

A: Yes. Both devices support In System Programmable (ISP) functionality with a minimum of 100 program/erase cycles, ensuring compatibility with existing programming infrastructure and procedures.

Q: What is the difference in regulatory compliance?

A: The ATF1500A-10AU is ROHS3 compliant, while the ATF1500A-15AI is RoHS non-compliant. Both devices maintain REACH Unaffected status. The improved compliance status of the substitute part aligns with current environmental regulations.

Q: Are voltage supply and temperature specifications identical?

A: Yes. Both devices operate with internal voltage supply of 4.5V ~ 5.5V and support the same operating temperature range of -40°C ~ 85°C (TA). No design modifications are required for power supply or thermal management.