M4A5-96/48-7VC Equivalent & Substitute Parts

Part Overview

The M4A5-96/48-7VC is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispMACH® 4A series. This device integrates 96 macrocells with 48 I/O pins in a 100-LQFP surface mount package, delivering 7.5 ns maximum propagation delay. The product is classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing system support and new designs requiring equivalent performance characteristics.

Substiute Parts

M4A5-96/48-7VC

Lattice Semiconductor CorporationIn Stock: 876M4A5-96/48-7VC Datasheet

Current PartRFQ

ATF1504AS-7AX100

Microchip TechnologyIn Stock: 1170ATF1504AS-7AX100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M4A5-96/48-7VC is determined by the following critical parameters:

Electrical Compatibility:

• Delay Time tpd(1) Max: 7.5 ns (matching performance requirement)
• Voltage Supply - Internal: 4.75V ~ 5.25V (5V logic family compatibility)
• Operating Temperature: 0°C ~ 70°C (TA) (commercial grade operation)
• Programmable Type: In System Programmable (field reconfiguration capability)

Physical Compatibility:

• Package / Case: 100-TQFP (14x14 mm footprint)
• Mounting Type: Surface Mount (PCB assembly compatibility)

Functional Compatibility:

• Macrocell and I/O count must support the original design requirements
• CPLD architecture with comparable logic density

The ATF1504AS-7AX100 from Microchip Technology meets these substitution criteria through matching electrical specifications, identical package form factor, and equivalent programmable logic architecture.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504AS-7AX100 serves as the primary substitute for the obsolete M4A5-96/48-7VC based on the following factors:

Electrical Performance: Both devices operate at identical voltage supply ranges (4.75V ~ 5.25V) and maximum propagation delay (7.5 ns), ensuring timing-critical applications maintain equivalent performance characteristics.

Package Compatibility: Both devices utilize 100-pin TQFP surface mount packages with identical 14x14 mm footprints, enabling direct PCB layout compatibility without redesign.

Programmable Architecture: Both devices support in-system programmable functionality, maintaining design flexibility for field updates and reconfiguration.

Product Availability: The ATF1504AS-7AX100 maintains active product status with current manufacturing support, addressing supply chain continuity concerns associated with the obsolete M4A5-96/48-7VC.

Compliance Considerations: The substitute device achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Design teams must evaluate regulatory requirements for their target applications.

Logic Density Trade-off: The substitute provides 64 macrocells versus the original 96 macrocells. Design verification is required to confirm that the reduced logic density accommodates the intended application logic.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504AS-7AX100 directly replace the M4A5-96/48-7VC without PCB modifications?

A: The identical 100-TQFP package footprint (14x14 mm) and pin count enable direct PCB placement compatibility. However, pin-to-pin functional mapping must be verified against the original design schematic, as I/O distribution differs between the devices.

Q: What is the impact of the reduced macrocell count (64 vs. 96) on design implementation?

A: The 33% reduction in macrocells may limit the complexity of logic functions that can be implemented. Design teams must synthesize and fit the original logic design into the ATF1504AS-7AX100 to confirm resource availability. If the design exceeds available macrocells, alternative devices with higher logic density are required.

Q: Are the programming algorithms compatible between these devices?

A: Both devices support in-system programmable functionality. However, programming file formats and algorithms are manufacturer-specific. Original design files must be re-synthesized and re-programmed for the ATF1504AS-7AX100 using Microchip development tools.

Q: Does the ROHS3 compliance of the substitute affect compatibility with RoHS non-compliant original designs?

A: ROHS3 compliance indicates the substitute device meets lead-free and hazardous substance restrictions. This does not affect electrical or functional compatibility. Design teams must verify that their complete system meets applicable regulatory requirements.

Q: What is the minimum program/erase cycle rating for the ATF1504AS-7AX100?

A: The device supports a minimum of 10,000 program/erase cycles, providing adequate endurance for development, field updates, and production programming operations.

Q: Are the moisture sensitivity levels equivalent between the original and substitute?

A: Both devices carry MSL 3 (168 Hours) ratings, indicating identical moisture handling and storage requirements during manufacturing and assembly processes.