ATF1500A-12AC Equivalent & Substitute Parts

Part Overview

The ATF1500A-12AC 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-12AC operates with a maximum propagation delay of 12 nanoseconds and is designed for in-system programmable applications requiring embedded logic integration.

Substiute Parts

ATF1500A-12AC

Microchip TechnologyIn Stock: 1255ATF1500A-12AC Datasheet

Current PartRFQ

ATF1500A-10AU

Microchip TechnologyIn Stock: 1637ATF1500A-10AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1500A-12AC is determined by the following critical parameters that must remain constant or compatible:

• Macrocell Count: 32 macrocells (functional logic capacity)
• I/O Pin Count: 32 I/O pins (interface compatibility)
• Package Type: 44-TQFP (10x10) (physical and electrical footprint)
• Programmable Architecture: In System Programmable (ISP) capability
• Series Family: ATF15xx (design compatibility)

The ATF1500A-10AU qualifies as a direct substitute based on identical macrocell count, I/O configuration, package specification, and programmable type. This substitute maintains full functional compatibility while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ATF1500A-10AU is the qualified substitute for the obsolete ATF1500A-12AC based on the following engineering criteria:

Functional Compatibility: Both devices share identical macrocell and I/O configurations, ensuring design-level compatibility without logic architecture modifications.

Package Compatibility: Both devices utilize the 44-TQFP (10x10) package, permitting direct PCB footprint compatibility and assembly process alignment.

Performance Enhancement: The ATF1500A-10AU provides superior propagation delay performance (10 ns versus 12 ns), delivering improved timing margins for existing designs.

Compliance Status: The ATF1500A-10AU holds Active product status and ROHS3 compliance certification, addressing regulatory and supply chain continuity requirements that the obsolete ATF1500A-12AC cannot satisfy.

Voltage and Temperature Specifications: The ATF1500A-10AU supports an extended voltage range (4.5V ~ 5.5V versus 4.75V ~ 5.25V) and expanded operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C), providing greater application flexibility.

Frequently Asked Questions (FAQ)

Q: Can the ATF1500A-10AU directly replace the ATF1500A-12AC in existing designs?

A: Yes. Both devices share identical macrocell count (32), I/O pin count (32), and 44-TQFP package specification. The substitute requires no PCB modifications or design alterations.

Q: What are the key differences between these two parts?

A: The primary differences are propagation delay (10 ns versus 12 ns), operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C), voltage supply range (4.5V ~ 5.5V versus 4.75V ~ 5.25V), product status (Active versus Obsolete), and RoHS compliance (ROHS3 Compliant versus non-compliant).

Q: Why is the ATF1500A-12AC classified as obsolete?

A: The ATF1500A-12AC has reached end-of-life status within Microchip Technology's product portfolio. The ATF1500A-10AU represents the current active alternative within the same device family.

Q: Are there any programming compatibility concerns?

A: Both devices support In System Programmable (ISP) architecture with identical minimum program/erase cycle specifications (100 cycles). Programming methodology and toolchain compatibility remain consistent.

Q: What is the moisture sensitivity level for both devices?

A: Both the ATF1500A-12AC and ATF1500A-10AU carry MSL 3 rating with a 168-hour floor life specification, requiring equivalent moisture control and handling procedures.

Q: Does the improved propagation delay of the ATF1500A-10AU affect design compatibility?

A: No. The 10 ns propagation delay of the substitute is faster than the 12 ns specification of the original part, providing improved timing performance without creating timing violations in designs originally qualified to the 12 ns specification.