M4A3-64/32-7VC48 Equivalent & Substitute Parts

Part Overview

The M4A3-64/32-7VC48 is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispMACH® 4A series. This 48-pin TQFP surface mount device integrates 64 macrocells with 32 I/O pins and delivers 7.5 ns propagation delay, operating within the 3V to 3.6V supply range. The device is In System Programmable, enabling field configuration and reconfiguration during application development and deployment.

The M4A3-64/32-7VC48 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for existing applications and new designs requiring comparable CPLD functionality.

Substiute Parts

M4A3-64/32-7VC48

Lattice Semiconductor CorporationIn Stock: 2620M4A3-64/32-7VC48 Datasheet

Current PartRFQ

ATF1504ASV-15AU44

Microchip TechnologyIn Stock: 1889ATF1504ASV-15AU44 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M4A3-64/32-7VC48 is determined by the following critical parameters:

• Macrocell Count: 64 macrocells (functional logic capacity)
• I/O Pin Count: 32 I/O pins (interface capability)
• Voltage Supply Range: 3V ~ 3.6V (power compatibility)
• Programmable Type: In System Programmable (field reconfiguration capability)
• Mounting Type: Surface Mount (PCB assembly compatibility)
• Package Form Factor: Pin count and physical dimensions

The ATF1504ASV-15AU44 from Microchip Technology meets these core substitution criteria. Both devices provide 64 macrocells, 32 I/O pins, 3V to 3.6V supply operation, and In System Programmable functionality in surface mount packages. Differences in propagation delay (15 ns vs. 7.5 ns), operating temperature range, and package pin count (44 vs. 48) must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504ASV-15AU44 is an active product from Microchip Technology, providing supply chain continuity for applications currently using the obsolete M4A3-64/32-7VC48. Both devices share identical macrocell count (64), I/O pin count (32), and voltage supply range (3V ~ 3.6V), establishing functional equivalence for logic capacity and power requirements.

The ATF1504ASV-15AU44 offers extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and ROHS3 compliance, supporting modern manufacturing and environmental standards. The substitute device operates at 15 ns maximum propagation delay compared to 7.5 ns for the original part; timing-critical applications must verify that this performance difference does not impact system specifications.

Package differences exist: the M4A3-64/32-7VC48 uses a 48-pin TQFP (7x7 mm) while the ATF1504ASV-15AU44 uses a 44-pin TQFP (10x10 mm). PCB layout modifications are required to accommodate the different pin count and physical dimensions. Pin mapping and functional assignment must be validated during design migration.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504ASV-15AU44 directly replace the M4A3-64/32-7VC48 without design changes?

A: Direct pin-for-pin replacement is not possible due to different package pin counts (44 vs. 48) and physical dimensions (10x10 mm vs. 7x7 mm). PCB layout redesign and pin mapping verification are required. However, both devices provide equivalent macrocell and I/O capacity for logic functionality.

Q: What is the impact of the 15 ns propagation delay versus 7.5 ns?

A: The ATF1504ASV-15AU44 operates at twice the propagation delay of the original part. Applications with timing-critical paths must verify that system performance specifications remain within acceptable limits. Timing analysis and simulation are necessary to confirm compatibility.

Q: Are there compliance or environmental differences between these devices?

A: The ATF1504ASV-15AU44 is ROHS3 compliant, while the M4A3-64/32-7VC48 is RoHS non-compliant. Both devices have identical Moisture Sensitivity Level (MSL 3, 168 Hours). The substitute device supports modern manufacturing and environmental regulations.

Q: What is the operating temperature range difference?

A: The M4A3-64/32-7VC48 operates from 0°C to 70°C, while the ATF1504ASV-15AU44 operates from -40°C to 85°C. The substitute device provides wider temperature coverage, supporting extended industrial and automotive temperature requirements.

Q: Are both devices In System Programmable?

A: Yes. Both the M4A3-64/32-7VC48 and ATF1504ASV-15AU44 support In System Programmable functionality, enabling field configuration and reconfiguration. The ATF1504ASV-15AU44 specifies a minimum of 10,000 program/erase cycles.

Q: What supply voltage is required for both devices?

A: Both devices operate within the 3V to 3.6V internal supply voltage range, ensuring power supply compatibility for existing designs.