M4A5-256/128-65YNC

Complex Programmable Logic Devices Overview

The M4A5-256/128-65YNC 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 counter frequency of 154 MHz. It utilizes E2CMOS technology for in-system programming via the JTAG interface. The part number suffix indicates a -65 speed grade, commercial temperature range, and a YNC package configuration.

Complex Programmable Logic Devices Feature Summary

• High-performance 5-V CPLD architecture with 256 macrocells and 100% pin-out retention
• SpeedLocking feature guarantees fixed timing performance independent of logic complexity
• Supports mixed-voltage system designs with 3.3-V and 5-V JEDEC-compliant operations
• Includes IEEE 1149.1 boundary scan testing and hot-socketing capabilities

Complex Programmable Logic Devices Applications

• PCI compliant interface implementations
• Mixed supply voltage system integration
• High-speed data routing and switching

Complex Programmable Logic Devices Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature rating. Confirm compliance requirements such as RoHS status if applicable, as lead-free options are available for this family. Ensure the design tool supports the ispMACH 4A architecture for proper compilation and fitting.

Complex Programmable Logic Devices Selection Notes

Select this model when a 5-V supply is required for the target application. The 256 macrocell density provides sufficient logic resources for moderate complexity designs. Verify that the 128 I/O option fits the board layout constraints and that the 6.5 ns speed grade meets the system timing requirements.

Complex Programmable Logic Devices Part Context

This component belongs to the ispMACH 4A family, which offers flexible architecture with central, input, and output switch matrices. The family includes both 3.3-V and 5-V variants, providing designers with options for different voltage domains while maintaining consistent architectural features like SpeedLocking and First-Time-Fit capabilities.

Complex Programmable Logic Devices Replacement Considerations

Compatible replacements within the same family include other M4A5-256 variants with different speed grades or package options, provided the electrical characteristics and pinout compatibility are verified.