M4A3-128/64-55CAC

Complex Programmable Logic Devices Overview

The M4A3-128/64-55CAC is a 3.3-V ispMACH 4A Complex Programmable Logic Device (CPLD) from Lattice Semiconductor, featuring 128 macrocells and 64 user I/Os. It operates at a commercial speed grade of -55 with a propagation delay ($t_{PD}$) of 5.5 ns and a maximum counter frequency ($f_{CNT}$) of 167 MHz. The device utilizes E²CMOS technology for in-system programming via JTAG (IEEE 1149.1). Key architectural features include SpeedLocking for guaranteed fixed timing, 100% pin-out retention, and support for PCI compliance.

Complex Programmable Logic Devices Feature Summary

• High-performance E²CMOS architecture with 5.5 ns $t_{PD}$ and 167 MHz $f_{CNT}$
• SpeedLocking feature ensures fixed timing independent of logic complexity
• 100% utilization and 100% pin-out retention across design changes
• JTAG-compliant boundary scan testing and in-system programming

Complex Programmable Logic Devices Applications

• PCI-compliant system integration
• Mixed supply voltage designs requiring 3.3-V and 5-V safety
• High-speed logic replacement with predictable timing

Complex Programmable Logic Devices Procurement Notes

Verify the specific package type associated with the suffix 'CAC' against official Lattice documentation, as datasheet tables list multiple package options for the M4A3-128 family without explicitly mapping every suffix to a package in the provided text. Confirm lead-free status if required by the application.

Complex Programmable Logic Devices Selection Notes

Select this device for applications requiring 128 macrocells with 64 I/Os. Ensure the design fits within the 5.5 ns timing constraints. Consider the M4A3-128/96 variant if 96 I/Os are needed instead. Verify that the 3.3-V core voltage aligns with the system power requirements.

Complex Programmable Logic Devices Part Context

The M4A3-128 belongs to the ispMACH 4A family, which offers densities from 32 to 512 macrocells. This family is characterized by its flexible architecture, central switch matrix, and compatibility with both 3.3-V and 5-V systems through specific device variants (M4A3 vs. M4A5).

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same density and I/O count include other speed grades of the M4A3-128 (e.g., -5, -6, -65) if timing requirements allow. Cross-family migration to newer Lattice CPLDs may require architectural redesign.