M4A3-64/32-7VC Equivalent & Substitute Parts

Part Overview

The M4A3-64/32-7VC is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispMACH® 4A series. This device features 64 macrocells, 32 I/O pins, and a propagation delay of 7.5 ns in a 44-TQFP surface mount package. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations where legacy compatibility is required.

Substiute Parts

M4A3-64/32-7VC

Lattice Semiconductor CorporationIn Stock: 1595M4A3-64/32-7VC Datasheet

Current PartRFQ

ATF1504ASV-15AU44

Microchip TechnologyIn Stock: 1889ATF1504ASV-15AU44 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M4A3-64/32-7VC is determined by the following critical parameters:

• Macrocell Count: 64 macrocells (functional logic capacity)
• I/O Pin Count: 32 I/O pins (interface capability)
• Package Type: 44-TQFP (10x10) (physical and electrical compatibility)
• Voltage Supply: 3V ~ 3.6V (power supply compatibility)
• Programmable Type: In System Programmable (field reconfiguration capability)
• Mounting Type: Surface Mount (assembly compatibility)

The ATF1504ASV-15AU44 from Microchip Technology meets all these core substitution criteria. While the propagation delay differs (15 ns vs. 7.5 ns), this represents a relaxation of timing performance rather than a constraint, making it suitable for applications where the original 7.5 ns specification is not a hard requirement.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504ASV-15AU44 is the primary substitute for the M4A3-64/32-7VC based on the following factors:

Functional Equivalence: Both devices provide identical macrocell count (64), I/O pin count (32), voltage supply range (3V ~ 3.6V), and package configuration (44-TQFP). In-system programmability is supported by both devices.

Product Status: The M4A3-64/32-7VC is obsolete, while the ATF1504ASV-15AU44 maintains active product status with confirmed availability (1828 pcs in stock). This ensures long-term supply chain viability.

Compliance Posture: The ATF1504ASV-15AU44 is ROHS3 compliant, whereas the M4A3-64/32-7VC is RoHS non-compliant. For applications subject to RoHS regulations, the substitute provides regulatory alignment.

Operating Temperature Range: The substitute extends the operating temperature range to -40°C ~ 85°C, providing broader environmental coverage compared to the original 0°C ~ 70°C specification.

Timing Consideration: The propagation delay increases from 7.5 ns to 15 ns. Selection of this substitute is appropriate for applications where timing margins accommodate this relaxation. Applications with strict timing requirements below 15 ns may require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504ASV-15AU44 directly replace the M4A3-64/32-7VC in existing designs?

A: Direct replacement is possible from a physical and electrical standpoint. Both devices share identical macrocell count, I/O pin count, package type (44-TQFP), and voltage supply range (3V ~ 3.6V). However, the propagation delay difference (15 ns vs. 7.5 ns) must be evaluated against your circuit's timing requirements. If your design operates within the 15 ns timing budget, substitution is straightforward. If timing margins are critical, detailed timing analysis is necessary.

Q: Are there any programming differences between these devices?

A: Both devices support In System Programmable (ISP) functionality. The ATF1504ASV-15AU44 specifies a minimum of 10,000 program/erase cycles. Existing programming methodologies and tools compatible with 44-TQFP CPLD devices should function with both parts, though device-specific programming files may require regeneration.

Q: What is the impact of the extended operating temperature range on the substitute?

A: The ATF1504ASV-15AU44 operates from -40°C to 85°C, compared to the original 0°C to 70°C range. This extended range provides greater flexibility for applications in industrial or automotive environments. If your application operates within the original 0°C to 70°C window, the extended range of the substitute presents no disadvantage.

Q: Does the RoHS compliance difference affect substitution?

A: The ATF1504ASV-15AU44 is ROHS3 compliant, while the M4A3-64/32-7VC is RoHS non-compliant. For new designs or applications subject to RoHS regulations, the substitute provides regulatory compliance. For legacy systems already using RoHS non-compliant components, substitution with a compliant device may require supply chain and documentation updates.

Q: Are the package dimensions identical?

A: Both devices use the 44-TQFP (10x10) package configuration. Physical footprint, pin pitch, and mounting requirements are identical, enabling direct PCB layout compatibility without redesign.