M4A5-256/128-12YNI

Complex Programmable Logic Devices Overview

The M4A5-256/128-12YNI is a 5-V ispMACH 4A Complex Programmable Logic Device (CPLD) from Lattice Semiconductor. It features 256 macrocells and supports up to 128 user I/Os. The device operates with a maximum propagation delay of 6.5 ns and a maximum count frequency of 154 MHz. It utilizes E2CMOS technology for high performance and in-system programmability via JTAG. The part includes comprehensive logic resources, flexible routing matrices, and support for mixed-voltage system designs.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells with 768 registers and 128 User I/O options
• High-speed performance: 6.5 ns tPD and 154 MHz fCNT
• 5-V operation with JTAG (IEEE 1149.1) boundary scan and in-system programming
• Flexible architecture with central switch matrix ensuring 100% routability

Complex Programmable Logic Devices Applications

• PCI compliant interface design
• Mixed supply voltage system integration
• Complex digital logic replacement
• System control and monitoring

Complex Programmable Logic Devices Procurement Notes

Verify the specific speed grade suffix '12' corresponds to the required 6.5 ns timing specification. Confirm package type matches the 'YNI' designation, typically a TQFP variant. Ensure the design tool supports the ispMACH 4A family for compilation and programming. Check for lead-free compliance if required by environmental standards.

Complex Programmable Logic Devices Selection Notes

Select this model for applications requiring 5-V I/O levels and moderate logic density. The 256 macrocell count fits designs needing up to 768 registers. Compare against the M4A3-256 series if 3.3-V operation is sufficient, as it offers similar density. Consider the -12 speed grade only if the 6.5 ns delay meets the system timing constraints.

Complex Programmable Logic Devices Part Context

This component belongs to the ispMACH 4A family, which provides high-performance E2CMOS CPLDs. The family ranges from 32 to 512 macrocells. The M4A5 variant specifically targets 5-V systems, offering safety for mixed-voltage environments where 5-V inputs must not overdrive 3.3-V outputs.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same family include other M4A5-256 variants with different speed grades or package options. For 3.3-V equivalents, consider the M4A3-256 series. Verify pinout compatibility when substituting packages.