ATF1504AS-15AI100 Equivalent & Substitute Parts

Part Overview

The ATF1504AS-15AI100 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 64 macrocells and 64 I/O pins in a 100-TQFP surface mount package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

The ATF1504AS-15AI100 operates within the 4.5V to 5.5V supply range with a maximum propagation delay of 15 nanoseconds and supports in-system programming with a minimum of 10,000 program/erase cycles. The device is not RoHS compliant and carries an MSL rating of 3 (168 hours).

Substiute Parts

ATF1504AS-15AI100

Microchip TechnologyIn Stock: 1152ATF1504AS-15AI100 Datasheet

Current PartRFQ

ATF1504AS-10AU100

Microchip TechnologyIn Stock: 1563ATF1504AS-10AU100 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1504AS-15AI100 is determined by strict equivalence across the following critical parameters:

• Identical macrocell count (64 macrocells)
• Identical I/O pin count (64 I/O)
• Identical voltage supply range (4.5V ~ 5.5V)
• Identical package type and pin configuration (100-TQFP, 14x14mm)
• Identical operating temperature range (-40°C ~ 85°C)
• Identical in-system programmability specification (min 10K program/erase cycles)
• Identical series designation (ATF15xx)

The ATF1504AS-10AU100 qualifies as a direct substitute based on these parameters. The primary distinction is the maximum propagation delay specification: the substitute part features a 10 nanosecond maximum delay compared to the 15 nanosecond specification of the original part. This represents an improvement in timing performance and does not restrict compatibility in applications designed for the ATF1504AS-15AI100.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504AS-10AU100 is the qualified substitute for the ATF1504AS-15AI100. Selection between these parts should be based on the following criteria:

Product Status: The ATF1504AS-15AI100 is obsolete, while the ATF1504AS-10AU100 maintains active product status. For new designs or ongoing procurement, the active part is the appropriate choice.

Compliance Posture: The ATF1504AS-10AU100 is ROHS3 compliant, whereas the ATF1504AS-15AI100 is non-compliant. Applications subject to RoHS requirements must use the substitute part.

Timing Performance: The ATF1504AS-10AU100 provides superior timing characteristics with a 10 nanosecond maximum propagation delay versus 15 nanoseconds. This improvement is backward compatible with designs specified for the original part and introduces no functional restrictions.

Electrical and Mechanical Compatibility: Both parts share identical voltage supply ranges, macrocell counts, I/O configurations, package types, and operating temperature ranges, ensuring direct functional equivalence at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504AS-10AU100 replace the ATF1504AS-15AI100 in existing designs?

A: Yes. The substitute part maintains identical electrical specifications for voltage supply, macrocell count, I/O pin count, operating temperature range, and package configuration. The improved timing specification (10 ns versus 15 ns) does not introduce compatibility issues in applications designed for the original part.

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

A: The ATF1504AS-10AU100 features a maximum propagation delay of 10 nanoseconds compared to 15 nanoseconds for the ATF1504AS-15AI100. This represents faster logic propagation and is a performance improvement. Applications with timing margins designed for 15 nanoseconds will operate within specification with the faster substitute part.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 100-TQFP package with dimensions of 14x14mm. Pin configuration and footprint are identical, enabling direct PCB-level substitution without layout modifications.

Q: What is the difference in product status, and why does it matter?

A: The ATF1504AS-15AI100 is classified as obsolete, indicating discontinued manufacturing and limited availability. The ATF1504AS-10AU100 maintains active status with ongoing production and supply availability. For new procurement or long-term system support, the active part is the appropriate selection.

Q: Does the RoHS compliance difference affect substitution?

A: RoHS compliance is a regulatory and procurement consideration rather than a functional one. The ATF1504AS-10AU100 is ROHS3 compliant, while the original part is non-compliant. Applications subject to RoHS requirements must use the compliant substitute part.

Q: Are the in-system programming specifications identical?

A: Yes. Both parts support in-system programmability with a minimum of 10,000 program/erase cycles, ensuring equivalent programming capability and flexibility in field updates or reconfiguration.