ATF1504BE-5AX44 Equivalent & Substitute Parts

Part Overview

The ATF1504BE-5AX44 is a 64 macrocell CPLD (Complex Programmable Logic Device) manufactured by Microchip Technology, housed in a 44-pin TQFP package with 5 ns propagation delay. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates with internal voltage supply of 1.7V to 1.9V and supports in-system programming with a minimum of 10,000 program/erase cycles.

Substiute Parts

ATF1504BE-5AX44

Microchip TechnologyIn Stock: 1197ATF1504BE-5AX44 Datasheet

Current PartRFQ

ATF1504ASV-15AU100

Microchip TechnologyIn Stock: 1360ATF1504ASV-15AU100 Datasheet

MFR RecommendedRFQ

LA4064ZC-75TN48E

Lattice Semiconductor CorporationIn Stock: 863LA4064ZC-75TN48E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ATF1504BE-5AX44 is determined by the following critical parameters:

• Macrocell Count: Must equal 64 macrocells to maintain functional equivalence
• I/O Pin Count: Minimum 32 I/O pins required; higher pin counts are acceptable with package accommodation
• Propagation Delay: Maximum 5 ns or faster acceptable for timing-critical applications
• Voltage Supply: Internal supply range must be compatible or overlapping with 1.7V ~ 1.9V
• Package Type: TQFP packages with equivalent or greater pin density acceptable
• Programmability: In-system programmable capability required

The two substitute parts listed meet the 64 macrocell requirement and in-system programmability specification. However, they differ in package configuration, voltage supply ranges, and propagation delay characteristics, requiring evaluation based on specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

ATF1504ASV-15AU100: This Microchip part maintains manufacturer continuity within the ATF15xx series and is currently in active production status. It provides 64 macrocells with expanded I/O capability (64 pins versus 32). The 100-pin TQFP package requires PCB layout modification. The 15 ns propagation delay is slower than the original specification. Voltage supply operates at 3V ~ 3.6V, requiring external supply adjustment. Extended operating temperature range (-40°C ~ 85°C) provides broader environmental coverage than the original part.

LA4064ZC-75TN48E: This Lattice Semiconductor part maintains the original 1.7V ~ 1.9V internal voltage supply, eliminating supply circuit redesign. The 48-pin TQFP package (7x7) represents a minimal footprint increase from the original 44-pin package. The 7.5 ns propagation delay is marginally slower than the original 5 ns specification. Extended operating temperature range (-40°C ~ 125°C) and active product status support long-term availability. Both parts maintain ROHS3 compliance and equivalent moisture sensitivity levels.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504ASV-15AU100 directly replace the ATF1504BE-5AX44 without design changes?

A: No. The ATF1504ASV-15AU100 requires PCB layout modification due to the 100-pin TQFP package versus the original 44-pin package. Additionally, the voltage supply range differs (3V ~ 3.6V versus 1.7V ~ 1.9V), requiring external power supply circuit adjustment. The 15 ns propagation delay is slower than the original 5 ns specification and may impact timing-critical applications.

Q: Can the LA4064ZC-75TN48E directly replace the ATF1504BE-5AX44?

A: The LA4064ZC-75TN48E is a closer functional match, maintaining the 1.7V ~ 1.9V internal voltage supply. The 48-pin TQFP package (7x7) requires minimal PCB layout modification compared to the original 44-pin package. The 7.5 ns propagation delay is slightly slower than the original 5 ns specification. Firmware compatibility must be evaluated, as this part is manufactured by Lattice Semiconductor rather than Microchip Technology.

Q: What are the key differences in I/O pin count between these parts?

A: The original ATF1504BE-5AX44 provides 32 I/O pins in a 44-pin package. The ATF1504ASV-15AU100 provides 64 I/O pins in a 100-pin package, offering expanded I/O capability at the cost of increased package size. The LA4064ZC-75TN48E provides 32 I/O pins in a 48-pin package, matching the original I/O count with minimal package size increase.

Q: Are all three parts RoHS3 compliant?

A: Yes. The ATF1504BE-5AX44, ATF1504ASV-15AU100, and LA4064ZC-75TN48E are all ROHS3 compliant with equivalent moisture sensitivity levels (MSL 3, 168 hours).

Q: What is the impact of propagation delay differences on system performance?

A: The original ATF1504BE-5AX44 specifies 5 ns maximum propagation delay. The ATF1504ASV-15AU100 specifies 15 ns, and the LA4064ZC-75TN48E specifies 7.5 ns. Applications with timing margins greater than 2.5 ns (for LA4064ZC-75TN48E) or 10 ns (for ATF1504ASV-15AU100) may accommodate these substitutes without performance degradation. Timing-critical designs require detailed path analysis.