M4A3-256/128-7FAI

Complex Programmable Logic Devices Overview

The M4A3-256/128-7FAI is a 3.3-V ispMACH 4A CPLD featuring 256 macrocells and 128 user I/Os in a 256-pin fpBGA package. It operates at the -7 speed grade with a guaranteed propagation delay (tPD) of 7.0 ns and a maximum count frequency (fCNT) of 167 MHz. The device utilizes E2CMOS technology for high performance and low power, supporting JTAG boundary scan testing and in-system programming. It offers flexible architecture with 100% pin-out retention and SpeedLocking for fixed timing performance.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells with 128 User I/Os in 256-ball fine-pitch BGA package
• -7 Speed Grade: 7.0 ns tPD and 167 MHz fCNT
• SpeedLocking feature guarantees fixed timing up to 20 product terms per output
• JTAG (IEEE 1149.1) compliant for boundary scan and in-system programming

Complex Programmable Logic Devices Applications

• High-speed digital logic interfacing
• PCI-compliant system designs
• Mixed-voltage system integration
• Complex state machine implementation

Complex Programmable Logic Devices Procurement Notes

Verify the specific ordering suffix '7FAI' against the manufacturer's current datasheet to confirm package type, temperature range, and lead-free status. Ensure compatibility with Lattice Diamond software tools for design entry and programming. Confirm that the 256-ball fpBGA footprint matches the target PCB layout requirements.

Complex Programmable Logic Devices Selection Notes

Select this model for designs requiring 256 macrocells with high I/O density. The -7 speed grade provides 7.0 ns delay, suitable for moderate-to-high speed applications. Verify that the 3.3-V supply voltage aligns with the system power rails. Consider the fpBGA package constraints for thermal management and routing complexity compared to lower pin-count alternatives.

Complex Programmable Logic Devices Part Context

This component belongs to the Lattice ispMACH 4A family, which offers E2CMOS technology for non-volatile configuration. The family ranges from 32 to 512 macrocells. The M4A3-256 variant specifically provides a balance of logic capacity and I/O flexibility, utilizing a central switch matrix for 100% routability and dedicated input/output switch matrices for pin-out retention.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same family include other M4A3-256 variants with different speed grades (-5, -55, -6, -65, -10, -12) or package options (PQFP, BGA). Cross-family migration to ispMACH 5A or MachXO series requires architectural re-evaluation due to differences in logic structure and I/O capabilities.