ATF1504AS-10JC44 Equivalent & Substitute Parts

Part Overview

The ATF1504AS-10JC44 is a Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology, featuring 64 macrocells and 32 I/O pins in a 44-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 and electrical specifications define the substitution criteria for this embedded integrated circuit.

Substiute Parts

ATF1504AS-10JC44

Microchip TechnologyIn Stock: 1773ATF1504AS-10JC44 Datasheet

Current PartRFQ

ATF1504AS-10JU44

Microchip TechnologyIn Stock: 1498ATF1504AS-10JU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1504AS-10JC44 is determined by strict equivalence across the following critical parameters:

• Macrocell Count: 64 macrocells (functional logic capacity)
• I/O Pin Count: 32 I/O pins (interface capability)
• Propagation Delay: 10 ns maximum (timing performance)
• Package Type: 44-LCC (J-Lead) in 44-PLCC form factor (physical and electrical compatibility)
• Programmable Architecture: In System Programmable with minimum 10K program/erase cycles (programming capability)
• Manufacturer Series: ATF15xx (design compatibility)

The ATF1504AS-10JU44 meets all these criteria and qualifies as a direct substitute. Differences in voltage supply range, operating temperature range, product status, and compliance certifications do not affect functional substitutability for applications within the main part's original specifications.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504AS-10JU44 is the qualified substitute for the obsolete ATF1504AS-10JC44. Selection between these parts depends on application requirements and compliance mandates:

ATF1504AS-10JU44 is preferred when:

• New designs or system updates require RoHS3 compliance
• Applications operate within the extended temperature range of -40°C to 85°C
• Extended voltage supply tolerance (4.5V to 5.5V) provides operational margin
• Active product status ensures ongoing availability and manufacturing support

ATF1504AS-10JC44 remains applicable when:

• Legacy systems are constrained to original component specifications
• Operating conditions remain within 0°C to 70°C temperature range
• RoHS compliance is not a procurement requirement
• Voltage supply remains within 4.75V to 5.25V

Both parts share identical functional architecture, timing performance, and package dimensions, ensuring direct pin-for-pin and software compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504AS-10JU44 replace the ATF1504AS-10JC44 in existing designs?

A: Yes. Both devices share identical macrocell count (64), I/O pin count (32), propagation delay (10 ns), package type (44-LCC), and programmable architecture. Pin-for-pin and functional compatibility is confirmed.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), operating temperature range (0°C–70°C vs. -40°C–85°C), voltage supply tolerance (4.75V–5.25V vs. 4.5V–5.5V), and moisture sensitivity level (MSL 2 vs. MSL 3).

Q: Are there packaging differences?

A: No. Both parts use identical 44-PLCC packaging with 16.6x16.6 mm dimensions and 44-LCC (J-Lead) case style. Surface mount compatibility is identical.

Q: Does the extended operating temperature range of the ATF1504AS-10JU44 affect compatibility?

A: No. The extended range (-40°C to 85°C) is a superset of the original part's range (0°C to 70°C). Applications operating within the original temperature window remain fully compatible.

Q: What is the significance of the different voltage supply ranges?

A: The ATF1504AS-10JU44 provides wider voltage tolerance (4.5V–5.5V) compared to the original (4.75V–5.25V). This offers greater operational margin but does not affect compatibility for systems designed to the original specifications.

Q: How does RoHS compliance affect substitution?

A: RoHS compliance is a regulatory and procurement consideration, not a functional one. The ROHS3-compliant ATF1504AS-10JU44 is suitable for applications requiring environmental compliance. Legacy systems may continue using the non-compliant original part if compliance is not mandated.

Q: Are the programmable characteristics identical?

A: Yes. Both parts support In System Programming with a minimum of 10K program/erase cycles, ensuring equivalent reprogrammability and development flexibility.