M4A3-64/32-7VI

Complex Programmable Logic Devices Overview

The Lattice M4A3-64/32-7VI is a Complex Programmable Logic Device (CPLD) from the ispMACH 4A family, designed for high-performance E²CMOS applications. It operates at 3.3 V and features 64 macrocells with a 2:1 macrocell-to-I/O cell ratio, providing 32 user I/O options. The device utilizes an architecture with central, input, and output switch matrices to ensure 100% routability and pin-out retention. Key electrical specifications include a maximum propagation delay (tPD) of 7.5 ns and a maximum count frequency (fCNT) of 167 MHz. It supports JTAG boundary scan testing and in-system programming.

Complex Programmable Logic Devices Feature Summary

• ispMACH 4A architecture with central switch matrix for guaranteed fixed timing
• SpeedLocking feature ensures predictable performance up to 20 product terms per output
• Supports D/T registers, latches, and synchronous/asynchronous modes
• JTAG (IEEE 1149.1) compliant for boundary scan and in-system programming

Complex Programmable Logic Devices Applications

• PCI compliant logic design
• Mixed supply voltage system integration
• Automated test equipment connectivity via boundary scan

Complex Programmable Logic Devices Procurement Notes

Verify that the ordering suffix 'I' corresponds to the industrial temperature range (-40°C to +85°C) as defined in the datasheet speed grade tables. Confirm package type matches the specific variant ordered, as the family offers multiple package options including TQFP, PLCC, and BGA. Ensure design tools support the ispMACH 4A family for proper synthesis and fitting.

Complex Programmable Logic Devices Selection Notes

Select this model when 64 macrocells are required with a 2:1 macrocell-to-I/O ratio. The '-7' speed grade indicates a 7.5 ns tPD, suitable for designs requiring up to 167 MHz fCNT. Verify that the application requires 3.3 V operation and benefits from the 100% pin-out retention feature during design refits. Consider the -5 or -55 grades if lower power consumption is prioritized over speed.

Complex Programmable Logic Devices Part Context

This component belongs to the ispMACH 4A CPLD family, which includes devices ranging from 32 to 512 macrocells. The M4A3 series specifically denotes 3.3 V operation, distinct from the M4A5 series which supports 5 V. The family is characterized by its E²CMOS process, allowing for non-volatile configuration and low static power consumption.

Complex Programmable Logic Devices Replacement Considerations

For direct functional replacements within the same density and speed, consider other variants in the M4A3-64 series such as M4A3-64/32-5VI or M4A3-64/32-55VI, noting differences in propagation delay and power. Cross-family migration to newer Lattice families may require architectural redesign due to differences in macrocell structure and routing resources.