M4A3-32/32-5VC Equivalent & Substitute Parts

Part Overview

The M4A3-32/32-5VC is a 32-macrocell CPLD (Complex Programmable Logic Device) from Lattice Semiconductor Corporation's ispMACH® 4A series, housed in a 44-TQFP surface mount package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. The part operates with a 5 ns maximum propagation delay and supports in-system programmability, making it suitable for embedded logic applications requiring fast combinatorial and sequential operations.

Substiute Parts

M4A3-32/32-5VC

Lattice Semiconductor CorporationIn Stock: 823M4A3-32/32-5VC Datasheet

Current PartRFQ

ATF1502ASV-15AU44

Microchip TechnologyIn Stock: 1713ATF1502ASV-15AU44 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M4A3-32/32-5VC is determined by the following critical parameters:

• Macrocell Count: 32 macrocells (fixed requirement)
• I/O Count: 32 I/O pins (fixed requirement)
• Package Type: 44-TQFP surface mount (physical and electrical compatibility)
• Voltage Supply: 3V ~ 3.6V internal supply (power compatibility)
• Programmability: In-system programmable capability (functional requirement)
• Propagation Delay: Maximum 5 ns tpd(1) (performance specification)

The ATF1502ASV-15AU44 from Microchip Technology meets the core substitution criteria of 32 macrocells, 32 I/O pins, 44-TQFP packaging, 3V ~ 3.6V supply voltage, and in-system programmability. While the propagation delay specification differs (15 ns maximum versus 5 ns), this represents a relaxation of performance rather than a functional incompatibility, provided the application timing requirements do not mandate the faster 5 ns specification.

Parameter Comparison

Engineering Selection Recommendations

The ATF1502ASV-15AU44 is the identified substitute for the obsolete M4A3-32/32-5VC. Selection of this alternative is supported by the following factors:

Product Status: The M4A3-32/32-5VC is obsolete, whereas the ATF1502ASV-15AU44 maintains active product status with confirmed availability (1621 units in stock versus 797 units of the original part).

Compliance and Certifications: The ATF1502ASV-15AU44 is ROHS3 compliant, addressing regulatory requirements that the non-compliant M4A3-32/32-5VC does not satisfy. Both parts carry identical REACH and ECCN classifications (REACH Unaffected, EAR99).

Operating Temperature Range: The ATF1502ASV-15AU44 extends the operating temperature range to -40°C ~ 85°C (TA), providing broader environmental coverage compared to the original 0°C ~ 70°C specification.

Programmability Verification: The ATF1502ASV-15AU44 is verified as programmable with a minimum of 10,000 program/erase cycles, ensuring long-term reliability for in-system programming applications.

Selection of the ATF1502ASV-15AU44 requires confirmation that the application timing budget accommodates the 15 ns maximum propagation delay specification. Applications with timing-critical paths requiring sub-10 ns delays may require alternative evaluation.

Frequently Asked Questions (FAQ)

Q: Can the ATF1502ASV-15AU44 directly replace the M4A3-32/32-5VC in existing designs?

A: Direct replacement is possible from a pinout and package perspective, as both devices use 44-TQFP packaging with identical macrocell and I/O counts. However, the propagation delay difference (15 ns versus 5 ns) must be evaluated against application timing requirements. Designs with timing margins greater than 10 ns can accommodate this substitution without modification.

Q: What is the impact of the 10 ns propagation delay difference?

A: The ATF1502ASV-15AU44 specifies a maximum propagation delay of 15 ns compared to 5 ns for the M4A3-32/32-5VC. This affects the maximum combinatorial path delay and clock-to-output timing. Applications operating at frequencies below 66 MHz (1/15ns) are generally unaffected. Higher-frequency designs require detailed timing analysis.

Q: Are there programming tool compatibility considerations?

A: Both devices support in-system programmability. The ATF1502ASV-15AU44 is verified as programmable with Microchip development tools. Existing Lattice ispMACH® 4A programming infrastructure may require tool updates or reconfiguration for the Microchip ATF15xx series.

Q: Does the extended operating temperature range of the ATF1502ASV-15AU44 affect reliability?

A: The extended range (-40°C ~ 85°C versus 0°C ~ 70°C) provides additional environmental coverage without degrading reliability within the original specification window. Both devices maintain identical moisture sensitivity levels (MSL 3, 168 hours).

Q: What is the significance of ROHS3 compliance for the substitute part?

A: ROHS3 compliance indicates the ATF1502ASV-15AU44 meets current regulatory requirements for hazardous substance restrictions in electrical and electronic equipment. The original M4A3-32/32-5VC, marked as RoHS non-compliant, may face restrictions in certain markets or procurement environments.

Q: Are there inventory or lead-time advantages to using the substitute?

A: The ATF1502ASV-15AU44 maintains higher current inventory (1621 units) compared to the obsolete M4A3-32/32-5VC (797 units), with active product status ensuring ongoing availability and shorter lead times for future procurement.