M4A3-256/128-55FAC

Complex Programmable Logic Devices Overview

The M4A3-256/128-55FAC is a member of the ispMACH 4A family, a high-performance E2CMOS Complex Programmable Logic Device (CPLD). It features 256 macrocells and supports up to 128 user I/Os. The device operates at 3.3V with guaranteed fixed timing performance of 5.5 ns propagation delay (tPD) and 167 MHz maximum counting frequency (fCNT). It utilizes a central switch matrix for 100% routability and pin-out retention across design iterations.

Complex Programmable Logic Devices Feature Summary

• High-speed performance with 5.5 ns tPD and 167 MHz fCNT via SpeedLocking technology.
• Flexible architecture with 256 macrocells, D/T registers, and programmable polarity.
• JTAG (IEEE 1149.1) compliant for boundary scan testing and in-system programming.
• PCI compliant (-5/-55/-6/-65 speed grades) and safe for mixed supply voltage systems.

Complex Programmable Logic Devices Applications

• PCI-compliant system integration
• Mixed supply voltage designs
• Automated test equipment connectivity

Complex Programmable Logic Devices Procurement Notes

Verify the package type corresponding to the 'FAC' suffix against official Lattice Semiconductor documentation. Confirm that the specific revision of the datasheet matches the manufacturing date code. Ensure the component meets the required commercial temperature range specifications.

Complex Programmable Logic Devices Selection Notes

Select this model for designs requiring 256 macrocells with fixed timing guarantees. The -55 speed grade offers a balance between performance and power. Consider the 2:1 macrocell-to-I/O ratio when planning logic allocation and output switching matrix configurations.

Complex Programmable Logic Devices Part Context

This part belongs to the ispMACH 4A family, which provides E2CMOS technology for non-volatile reprogrammability. The family ranges from 32 to 512 macrocells, offering flexibility for various logic densities while maintaining consistent architectural features like the central switch matrix.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same family include other M4A3-256 variants with different speed grades or package options. Verify pin compatibility and electrical characteristics before substituting with devices from other manufacturers.

Complex Programmable Logic Devices FAQ

What is the macrocell-to-I/O cell ratio for this device?

The M4A3-256/128 variant has a 2:1 macrocell-to-I/O cell ratio, allowing flexible routing through the output switch matrix.

Does this device support JTAG boundary scan?

Yes, all ispMACH 4A devices are IEEE 1149.1 compliant and include boundary scan cells for testability.

What is the maximum operating frequency?

The device supports a maximum counting frequency (fCNT) of 167 MHz with the -55 speed grade.