Equivalent & Substitute Parts for M4A3-128/64-7VC

Part Overview

The M4A3-128/64-7VC is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispMACH® 4A series. This device features 128 macrocells, 64 I/O pins, and a maximum propagation delay of 7.5 ns in a 100-pin TQFP package. The product is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

M4A3-128/64-7VC

Lattice Semiconductor CorporationIn Stock: 1965M4A3-128/64-7VC Datasheet

Current PartRFQ

LC4128V-75TN100C

Lattice Semiconductor CorporationIn Stock: 19531LC4128V-75TN100C Datasheet

MFR RecommendedRFQ

ATF1508ASV-15AU100

Microchip TechnologyIn Stock: 1205ATF1508ASV-15AU100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the M4A3-128/64-7VC is determined by the following critical parameters:

Primary Compatibility Criteria:

• Macrocell count: 128 macrocells (fixed requirement)
• Package type: 100-pin TQFP (14x14 mm)
• Programmable architecture: In System Programmable
• Voltage supply range: 3V ~ 3.6V internal supply
• Moisture Sensitivity Level: 3 (168 Hours)

Secondary Considerations:

• Propagation delay (tpd): 7.5 ns maximum
• I/O pin count: 64 pins minimum
• Operating temperature range
• Product status and compliance certifications

The identified substitute parts meet the primary compatibility criteria and maintain functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

LC4128V-75TN100C (Lattice Semiconductor)

This substitute provides the closest functional match to the M4A3-128/64-7VC. Both devices share identical macrocell count (128), I/O configuration (64 pins), and propagation delay specification (7.5 ns). The LC4128V-75TN100C is from the active ispMACH® 4000V series and maintains full compatibility with the original part's electrical specifications. This device is ROHS3 compliant and has significantly higher inventory availability (19,435 units), making it the preferred primary substitute for new designs and ongoing production support.

ATF1508ASV-15AU100 (Microchip Technology)

This substitute meets the core macrocell requirement (128) and voltage supply specification (3V ~ 3.6V). The device provides extended I/O capability (80 pins versus 64) and broader operating temperature range (-40°C ~ 85°C). However, the propagation delay specification is 15 ns, which is double that of the original part. This device is suitable only for applications where the 15 ns delay is acceptable within system timing constraints. The ATF1508ASV-15AU100 is ROHS3 compliant and In System Programmable with minimum 10K program/erase cycles.

Both substitute parts are active products with current manufacturing support and ROHS3 compliance, providing long-term availability and regulatory alignment for modern applications.

Frequently Asked Questions (FAQ)

Q: Can the LC4128V-75TN100C directly replace the M4A3-128/64-7VC without design modifications?

A: Yes. The LC4128V-75TN100C maintains identical macrocell count (128), I/O pin count (64), propagation delay (7.5 ns), and voltage supply range (3V ~ 3.6V). Both devices use 100-pin TQFP packaging and In System Programmable architecture. No design modifications are required for electrical or mechanical compatibility.

Q: What is the primary limitation of the ATF1508ASV-15AU100 as a substitute?

A: The ATF1508ASV-15AU100 has a maximum propagation delay of 15 ns, compared to 7.5 ns for the original M4A3-128/64-7VC. This doubled delay specification may impact system timing performance. Use this substitute only if your application timing budget accommodates the 15 ns delay specification.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both the LC4128V-75TN100C and ATF1508ASV-15AU100 are ROHS3 compliant. The original M4A3-128/64-7VC is RoHS non-compliant. If RoHS compliance is a regulatory requirement, either substitute part satisfies this requirement.

Q: What is the difference in I/O pin count between the substitutes?

A: The LC4128V-75TN100C provides 64 I/O pins, matching the original part. The ATF1508ASV-15AU100 provides 80 I/O pins. If your design uses all 64 pins, both devices are compatible. The additional 16 pins on the ATF1508ASV-15AU100 are available for expansion but are not required for direct replacement.

Q: Which substitute has better long-term availability?

A: The LC4128V-75TN100C has significantly higher inventory (19,435 units) compared to the ATF1508ASV-15AU100 (1,107 units). Both are active products with ongoing manufacturing support. For procurement planning, the LC4128V-75TN100C offers superior availability assurance.

Q: Are the moisture sensitivity levels identical across all three parts?

A: Yes. All three devices—M4A3-128/64-7VC, LC4128V-75TN100C, and ATF1508ASV-15AU100—have Moisture Sensitivity Level 3 (168 Hours). Handling and storage requirements are identical.