ATF1508AS-15JC84 Equivalent & Substitute Parts

Part Overview

The ATF1508AS-15JC84 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 128 macrocells and 64 I/O pins in an 84-pin PLCC package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement. The ATF15xx series architecture enables in-system programmability with a minimum of 10,000 program/erase cycles, supporting legacy embedded applications requiring CPLD functionality.

Substiute Parts

ATF1508AS-15JC84

Microchip TechnologyIn Stock: 2435ATF1508AS-15JC84 Datasheet

Current PartRFQ

ATF1508AS-10JU84

Microchip TechnologyIn Stock: 8877ATF1508AS-10JU84 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1508AS-15JC84 is determined by the following critical parameters that must remain constant across equivalent parts:

• Macrocell count: 128 macrocells
• I/O pin count: 64 pins
• Package type: 84-LCC (J-Lead) with 29.31x29.31mm dimensions
• Programmable architecture: In System Programmable with minimum 10K program/erase cycles
• Manufacturer: Microchip Technology ATF15xx series

The ATF1508AS-10JU84 qualifies as a direct substitute based on identical macrocell and I/O specifications, matching package footprint, and compatible programmable characteristics. Differences in delay time, voltage supply range, operating temperature, and product status do not preclude substitution when system requirements permit.

Parameter Comparison

Engineering Selection Recommendations

The ATF1508AS-10JU84 serves as a functional equivalent for the obsolete ATF1508AS-15JC84 based on matching core architecture and pinout specifications. The substitute part offers improved performance characteristics: faster propagation delay (10 ns versus 15 ns), wider voltage supply tolerance (4.5V ~ 5.5V versus 4.75V ~ 5.25V), and extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C).

The ATF1508AS-10JU84 maintains active product status with ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete main part. Selection of the substitute part is appropriate for applications where the enhanced performance parameters and extended environmental specifications do not conflict with existing system constraints.

Frequently Asked Questions (FAQ)

Q: Can the ATF1508AS-10JU84 directly replace the ATF1508AS-15JC84 in existing designs?

A: Yes. Both devices share identical macrocell count (128), I/O pin count (64), and 84-PLCC package footprint (29.31x29.31mm). Pin-for-pin compatibility is maintained. The substitute part's faster propagation delay and wider operating specifications present no compatibility barriers for standard applications.

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

A: The primary differences are propagation delay (10 ns versus 15 ns), voltage supply range (4.5V ~ 5.5V versus 4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C), product status (Active versus Obsolete), and RoHS compliance (ROHS3 versus non-compliant). The substitute part offers superior performance and regulatory compliance.

Q: Are there packaging differences between these parts?

A: No. Both parts use identical 84-LCC (J-Lead) packaging with 29.31x29.31mm dimensions. Surface mount compatibility and PCB footprint requirements are identical.

Q: Why is the ATF1508AS-15JC84 marked as obsolete?

A: The main part has reached end-of-life status from Microchip Technology. The ATF1508AS-10JU84 remains in active production, ensuring continued availability for new designs and legacy system support.

Q: Does the faster delay time of the substitute part affect compatibility?

A: No. Faster propagation delay (10 ns) is a performance enhancement that does not create compatibility issues. Systems designed for 15 ns delay will operate correctly with 10 ns delay specifications.