M4A3-96/48-55VC Equivalent & Substitute Parts

Part Overview

The M4A3-96/48-55VC is a Complex Programmable Logic Device (CPLD) from Lattice Semiconductor Corporation's ispMACH® 4A series. This embedded integrated circuit features 96 macrocells, 48 I/O pins, and a propagation delay of 5.5 ns in a 100-LQFP surface mount package. The device is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations.

Substiute Parts

M4A3-96/48-55VC

Lattice Semiconductor CorporationIn Stock: 1016M4A3-96/48-55VC Datasheet

Current PartRFQ

ATF1504ASV-15AU100

Microchip TechnologyIn Stock: 1360ATF1504ASV-15AU100 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M4A3-96/48-55VC is determined by the following critical parameters:

• Package Compatibility: Both devices must use the 100-TQFP (14x14) surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.
• Programmable Type: In System Programmable capability is required to maintain design flexibility and field reprogrammability.
• Voltage Supply Range: Internal supply voltage of 3V ~ 3.6V ensures compatibility with existing power distribution networks.
• I/O Pin Count: Minimum 48 I/O pins required to support the original design's signal routing requirements.
• Macrocell Count: Minimum 96 macrocells required to accommodate the original logic density.

The ATF1504ASV-15AU100 from Microchip Technology meets these substitution criteria while offering enhanced specifications in certain areas.

Parameter Comparison

Engineering Selection Recommendations

The ATF1504ASV-15AU100 is an active product with current manufacturing support, addressing the obsolescence status of the M4A3-96/48-55VC. The substitute device maintains voltage supply compatibility and programmable functionality while offering an extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and ROHS3 compliance status.

Design considerations include the propagation delay differential (15 ns versus 5.5 ns) and macrocell count reduction (64 versus 96). The substitute provides additional I/O capacity (64 pins versus 48 pins), which may accommodate expanded signal requirements in redesigned implementations.

Frequently Asked Questions (FAQ)

Q: Can the ATF1504ASV-15AU100 directly replace the M4A3-96/48-55VC in existing designs?

A: Direct replacement requires design verification. While both devices share the 100-TQFP package footprint, voltage supply range, and In System Programmable capability, the ATF1504ASV-15AU100 has reduced macrocell count (64 versus 96) and increased propagation delay (15 ns versus 5.5 ns). Logic designs must be re-evaluated for resource utilization and timing constraints.

Q: What is the significance of the macrocell count difference?

A: Macrocells determine the maximum combinatorial and sequential logic density. The substitute device provides 64 macrocells compared to the original 96. Designs utilizing more than 64 macrocells cannot be directly ported without logic optimization or architectural redesign.

Q: How does the propagation delay difference affect system performance?

A: The M4A3-96/48-55VC specifies 5.5 ns maximum propagation delay, while the ATF1504ASV-15AU100 specifies 15 ns. Systems with timing-critical paths operating near the original device's delay specification may require timing re-analysis and potential redesign to accommodate the slower substitute.

Q: Are the packages mechanically compatible?

A: Both devices use 100-pin TQFP packages with 14x14 mm dimensions. PCB footprints are compatible. However, design verification is required to confirm that all signal routing and power distribution requirements can be satisfied with the substitute device's I/O configuration.

Q: What compliance advantages does the substitute offer?

A: The ATF1504ASV-15AU100 is ROHS3 compliant and an active product with ongoing manufacturer support. The M4A3-96/48-55VC is obsolete and RoHS non-compliant, making the substitute preferable for new designs and systems requiring regulatory compliance documentation.