ATF1504AS-10AC44 Equivalent & Substitute Parts

Part Overview

The ATF1504AS-10AC44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 64 macrocells and 32 I/O pins in a 44-pin TQFP 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 10 nanoseconds and supports in-system programming with a minimum of 10,000 program/erase cycles.

Substiute Parts

ATF1504AS-10AC44

Microchip TechnologyIn Stock: 2546ATF1504AS-10AC44 Datasheet

Current PartRFQ

ATF1504AS-10AU44

Microchip TechnologyIn Stock: 1444ATF1504AS-10AU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1504AS-10AC44 is determined by the following critical parameters:

• Identical macrocell count (64 macrocells)
• Identical I/O pin count (32 pins)
• Identical package type (44-TQFP)
• Identical propagation delay specification (10 ns maximum)
• Identical programmable type and cycle rating (In System Programmable, min 10K cycles)
• Identical moisture sensitivity level (MSL 3)
• Compatible voltage supply ranges
• Compatible operating temperature ranges for the target application

The ATF1504AS-10AU44 meets all substitution criteria as a direct equivalent within the ATF15xx series.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504AS-10AU44 is the direct substitute for the obsolete ATF1504AS-10AC44. Both devices share identical functional specifications, macrocell architecture, I/O configuration, and timing characteristics. The substitute part offers the following advantages:

• Active product status ensures continued availability and manufacturing support
• ROHS3 compliance meets current environmental and regulatory requirements
• Extended operating temperature range (-40°C to 85°C) provides broader application flexibility compared to the original part (0°C to 70°C)
• Wider voltage supply tolerance (4.5V to 5.5V) compared to the original (4.75V to 5.25V)

Selection of the ATF1504AS-10AU44 is appropriate for all applications previously designed with the ATF1504AS-10AC44, provided that the extended temperature and voltage specifications do not conflict with system constraints.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504AS-10AU44 be used as a direct replacement for the ATF1504AS-10AC44?

A: Yes. Both devices are functionally equivalent with identical macrocell count, I/O configuration, package type, and timing specifications. The substitute part is pin-compatible and supports the same programming methodology.

Q: What are the differences between these two parts?

A: The primary differences are product status, compliance certifications, and operating specifications. The ATF1504AS-10AU44 is an active product with ROHS3 compliance, extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), and wider voltage supply tolerance (4.5V to 5.5V versus 4.75V to 5.25V).

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

A: No. Both parts use identical 44-TQFP (10x10) packaging with surface mount mounting type. PCB layout and assembly processes require no modification.

Q: Does the extended temperature range of the substitute part affect my design?

A: The extended temperature range of the ATF1504AS-10AU44 (-40°C to 85°C) is a superset of the original specification (0°C to 70°C). This provides greater operational flexibility and does not introduce compatibility issues for designs operating within the original temperature range.

Q: Is the wider voltage supply range of the substitute part a concern?

A: No. The ATF1504AS-10AU44 voltage supply range (4.5V to 5.5V) encompasses the original specification (4.75V to 5.25V). Designs operating within the original voltage range remain fully compatible.

Q: What is the significance of ROHS3 compliance?

A: ROHS3 compliance indicates the substitute part meets current environmental and regulatory requirements for restricted hazardous substances. The original part is RoHS non-compliant, making the substitute preferable for applications subject to environmental regulations.