M4A3-32/32-7VC48 Equivalent & Substitute Parts

Part Overview

The M4A3-32/32-7VC48 is a 32-macrocell CPLD (Complex Programmable Logic Device) from Lattice Semiconductor Corporation's ispMACH® 4A series, housed in a 48-pin LQFP package. This device features in-system programmability and a maximum propagation delay of 7.5 ns, operating within a 3V to 3.6V supply range.

The M4A3-32/32-7VC48 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and maintenance requirements for systems utilizing this CPLD.

Substiute Parts

M4A3-32/32-7VC48

Lattice Semiconductor CorporationIn Stock: 2134M4A3-32/32-7VC48 Datasheet

Current PartRFQ

ATF1502ASV-15AU44

Microchip TechnologyIn Stock: 1713ATF1502ASV-15AU44 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M4A3-32/32-7VC48 is determined by the following critical parameters:

• Macrocell Count: 32 macrocells (functional equivalence requirement)
• I/O Pin Count: 32 I/O pins (functional equivalence requirement)
• Voltage Supply Range: 3V ~ 3.6V (electrical compatibility)
• Programmable Type: In System Programmable (design requirement)
• Package Compatibility: Pin count and form factor must accommodate existing PCB layouts

The ATF1502ASV-15AU44 meets these core substitution criteria. While it operates in a 44-pin TQFP package (versus the 48-pin LQFP of the original), it maintains the same 32-macrocell and 32-I/O configuration, identical voltage supply range, and in-system programmability. The propagation delay specification differs (15 ns versus 7.5 ns), which may impact timing-critical applications.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502ASV-15AU44 is the identified substitute for the obsolete M4A3-32/32-7VC48. Selection of this substitute should be based on the following factors:

Product Status: The ATF1502ASV-15AU44 maintains active product status with Microchip Technology, ensuring ongoing availability and support compared to the obsolete M4A3-32/32-7VC48.

Compliance: The ATF1502ASV-15AU44 is ROHS3 compliant, whereas the original part is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulations.

Functional Equivalence: Both devices provide 32 macrocells and 32 I/O pins with identical voltage supply specifications and in-system programmability, supporting functional replacement in most applications.

Timing Considerations: The propagation delay of the ATF1502ASV-15AU44 (15 ns) is slower than the original (7.5 ns). Applications with strict timing requirements must evaluate whether this specification change is acceptable.

Package Transition: The shift from 48-pin LQFP to 44-pin TQFP requires PCB layout modification. Pin mapping and signal routing must be re-evaluated during design transition.

Temperature Range: The ATF1502ASV-15AU44 supports an extended operating temperature range (-40°C to 85°C) compared to the original (0°C to 70°C), providing broader environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502ASV-15AU44 directly replace the M4A3-32/32-7VC48 without PCB modification?

A: No. The ATF1502ASV-15AU44 uses a 44-pin TQFP package, while the original uses a 48-pin LQFP package. PCB layout changes are required. Pin assignments must be verified and signal routing must be re-evaluated.

Q: What is the impact of the increased propagation delay (15 ns vs. 7.5 ns)?

A: The ATF1502ASV-15AU44 has twice the maximum propagation delay. Applications with timing-critical logic paths must verify that system timing margins remain acceptable with this specification change.

Q: Is the ATF1502ASV-15AU44 compatible with the same programming tools and firmware?

A: Both devices support in-system programmability. However, programming tool compatibility and firmware compatibility must be verified with the respective manufacturers' documentation, as they are from different vendors.

Q: Why is RoHS compliance relevant for this substitution?

A: The original M4A3-32/32-7VC48 is RoHS non-compliant, while the ATF1502ASV-15AU44 is ROHS3 compliant. Applications subject to RoHS regulations or customer requirements must use the compliant substitute.

Q: Does the extended temperature range of the ATF1502ASV-15AU44 affect its use in standard applications?

A: No. The extended range (-40°C to 85°C) is a superset of the original range (0°C to 70°C). The substitute is suitable for both standard and extended-temperature applications.

Q: Are there any electrical compatibility concerns between the two devices?

A: Both devices operate within the same voltage supply range (3V ~ 3.6V) and share identical macrocell and I/O counts. Electrical compatibility is maintained for core functionality. Pin-level signal compatibility must be verified during design transition.