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

Part Overview

The M4A3-32/32-7VC is a 32-macrocell CPLD (Complex Programmable Logic Device) from Lattice Semiconductor Corporation, packaged in a 44-pin TQFP surface mount configuration. This device operates with a maximum propagation delay of 7.5 ns and supports in-system programmability. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

M4A3-32/32-7VC

Lattice Semiconductor CorporationIn Stock: 3885M4A3-32/32-7VC Datasheet

Current PartRFQ

ATF1502ASV-15AU44

Microchip TechnologyIn Stock: 1713ATF1502ASV-15AU44 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Functional Equivalence Criteria:

• Number of Macrocells: 32 (must match)
• Number of I/O: 32 (must match)
• Package / Case: 44-TQFP (10x10) (must match for PCB compatibility)
• Mounting Type: Surface Mount (must match)
• Programmable Type: In System Programmable (must match)
• Voltage Supply - Internal: 3V ~ 3.6V (must match)

Performance Considerations:

• Delay Time tpd(1) Max: Substitute devices may have equal or higher delay values; faster substitutes are acceptable
• Operating Temperature: Substitute devices may have extended temperature ranges; narrower ranges are not acceptable

The ATF1502ASV-15AU44 from Microchip Technology meets all functional equivalence criteria and provides compatible electrical and mechanical characteristics for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502ASV-15AU44 is a direct functional substitute for the M4A3-32/32-7VC. Selection of this substitute is supported by the following factors:

Compatibility:

• Identical macrocell count (32), I/O count (32), and package configuration (44-TQFP 10x10) ensure pin-for-pin and footprint compatibility
• Matching voltage supply range (3V ~ 3.6V) and in-system programmability support seamless integration into existing designs

Performance:

• The substitute device operates at 15 ns maximum propagation delay, which is acceptable for applications originally designed for 7.5 ns performance, provided timing margins are verified in the target application
• Extended operating temperature range (-40°C ~ 85°C) provides superior thermal performance compared to the original device (0°C ~ 70°C)

Product Status and Compliance:

• The substitute is an active product with verified programmability, ensuring long-term availability and supply chain stability
• ROHS3 compliance of the substitute addresses regulatory requirements not met by the obsolete original device
• Both devices maintain identical moisture sensitivity levels (MSL 3, 168 Hours)

Frequently Asked Questions (FAQ)

Q: Can the ATF1502ASV-15AU44 be used as a direct replacement for the M4A3-32/32-7VC?

A: Yes. Both devices share identical macrocell count (32), I/O count (32), package configuration (44-TQFP 10x10), voltage supply range (3V ~ 3.6V), and in-system programmability. Pin-for-pin and footprint compatibility is confirmed.

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

A: The substitute device has a maximum propagation delay of 15 ns compared to 7.5 ns for the original. Applications must verify that timing constraints are satisfied with the longer delay. For non-timing-critical logic functions, this difference is not significant.

Q: Are there any temperature range considerations?

A: The substitute device operates across -40°C ~ 85°C, which exceeds the original device range of 0°C ~ 70°C. This provides improved thermal performance and wider environmental compatibility.

Q: What are the packaging and handling differences?

A: Both devices are supplied in 44-TQFP surface mount packages with identical moisture sensitivity levels (MSL 3, 168 Hours). Handling and storage procedures remain consistent.

Q: Is the substitute device RoHS compliant?

A: Yes. The ATF1502ASV-15AU44 is ROHS3 compliant, whereas the original M4A3-32/32-7VC is RoHS non-compliant. This addresses regulatory compliance requirements for new designs and system updates.

Q: Are there any programming or configuration differences?

A: Both devices support in-system programmability. The substitute specifies a minimum of 10K program/erase cycles. Existing design files and programming procedures for the original device are compatible with the substitute.