ATF1502ASV-20JC44 Equivalent & Substitute Parts

Part Overview

The ATF1502ASV-20JC44 is a Complex Programmable Logic Device (CPLD) from Microchip Technology's ATF15xx series, featuring 32 macrocells and 32 I/O pins in a 44-pin PLCC package. This device is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The part operates with internal voltage supply of 3V to 3.6V and supports in-system programming with a minimum of 10,000 program/erase cycles.

Substiute Parts

ATF1502ASV-20JC44

Microchip TechnologyIn Stock: 1968ATF1502ASV-20JC44 Datasheet

Current PartRFQ

ATF1502ASV-15JU44

Microchip TechnologyIn Stock: 3135ATF1502ASV-15JU44 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATF1502ASV-20JC44 is determined by the following critical parameters that must remain constant or compatible:

Fixed Parameters (Must Match):

• Manufacturer: Microchip Technology
• Series: ATF15xx
• Number of Macrocells: 32
• Number of I/O: 32
• Package / Case: 44-LCC (J-Lead)
• Mounting Type: Surface Mount
• Voltage Supply - Internal: 3V ~ 3.6V
• Programmable Type: In System Programmable

Variable Parameters (Allowable Differences):

• Delay Time tpd(1) Max: Substitute may have equal or faster (lower) propagation delay
• Operating Temperature Range: Substitute may have equal or wider temperature range
• Product Status: Substitute may be active or obsolete
• RoHS Compliance: Substitute may differ in compliance status
• Moisture Sensitivity Level: Substitute may differ

The ATF1502ASV-15JU44 qualifies as a direct substitute based on matching all fixed parameters while offering improved performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502ASV-15JU44 is a qualified substitute for the ATF1502ASV-20JC44 based on the following engineering criteria:

Functional Compatibility: Both devices share identical macrocell count (32), I/O pin count (32), voltage supply range (3V ~ 3.6V), and package configuration (44-LCC). Pin-to-pin compatibility is maintained, enabling direct replacement without PCB redesign.

Performance Enhancement: The substitute part provides superior propagation delay performance (15 ns versus 20 ns), which is backward-compatible with designs specified for the original 20 ns device.

Temperature Range Expansion: The substitute operates across -40°C to 85°C, extending the lower and upper temperature limits compared to the original 0°C to 70°C range, providing broader environmental applicability.

Product Status and Compliance: The substitute is classified as active, ensuring continued availability and manufacturing support. ROHS3 compliance of the substitute addresses regulatory requirements that the obsolete original part does not meet.

Programmability Verification: The substitute has verified in-system programmability status, confirming production-level programming capability.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502ASV-15JU44 be used as a direct replacement for the ATF1502ASV-20JC44?

A: Yes. Both devices are pin-compatible with identical macrocell and I/O configurations. The substitute operates within the same voltage supply range and uses the same 44-LCC package. No PCB modifications are required.

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

A: The primary differences are propagation delay (15 ns versus 20 ns), operating temperature range (-40°C to 85°C versus 0°C to 70°C), product status (active versus obsolete), and RoHS compliance (ROHS3 compliant versus non-compliant). The substitute offers improved performance and regulatory compliance.

Q: Does the faster propagation delay of the substitute affect compatibility?

A: No. Faster propagation delay is backward-compatible. Designs specified for 20 ns operation will function correctly with the 15 ns device, as timing margins are maintained or improved.

Q: What is the impact of the different operating temperature ranges?

A: The substitute supports a wider temperature range (-40°C to 85°C versus 0°C to 70°C). For applications operating within the original 0°C to 70°C range, both parts are equivalent. For applications requiring extended temperature operation, the substitute provides additional capability.

Q: Are there packaging differences between these parts?

A: Both parts use the 44-LCC (J-Lead) package with identical physical dimensions (16.6x16.6 mm). The main difference is packaging format: the original uses standard packaging while the substitute is supplied in tube packaging. This does not affect electrical or mechanical compatibility.

Q: What is the significance of the RoHS compliance difference?

A: The substitute is ROHS3 compliant, meeting current regulatory requirements for hazardous substance restrictions. The original part is non-compliant. For new designs or systems subject to RoHS regulations, the substitute is the appropriate choice.

Q: How does the Moisture Sensitivity Level (MSL) difference impact handling?

A: The original part has MSL 2 (1 Year shelf life), while the substitute has MSL 3 (168 Hours shelf life). MSL 3 requires more careful moisture control during storage and handling. Standard moisture-controlled storage practices are sufficient for both classifications.