ISPLSI 5256VE-80LT100I

Complex Programmable Logic Devices Overview

The ispLSI 5256VE-80LT100I is a high-density, in-system programmable complex programmable logic device (CPLD) from Lattice Semiconductor. It features 12,000 PLD gates and 256 macrocells organized into eight SuperWIDE Generic Logic Blocks (GLBs). The device operates on a 3.3V supply with user-selectable 3.3V or 2.5V I/O levels. Key electrical specifications include a maximum operating frequency of 165 MHz and a propagation delay of 6.0 ns. It utilizes E2CMOS technology for non-volatile storage and supports IEEE 1149.1 boundary scan testing.

Complex Programmable Logic Devices Feature Summary

• SuperWIDE Architecture: Eight GLBs with 32 macrocells each and a Global Routing Pool for efficient pin locking.
• High Performance: Supports up to 165 MHz operation with 6.0 ns propagation delay using E2CMOS technology.
• Flexible I/O: User-selectable 3.3V/2.5V output levels with programmable slew rate, open-drain, and bus-hold options.
• In-System Programmability: Non-volatile EEPROM-based programming via JTAG interface allows reprogramming without removal.

Complex Programmable Logic Devices Applications

• Complex glue logic replacement in high-speed digital systems
• Address decoding and state machine implementation
• Protocol conversion between different voltage domains (3.3V/2.5V)
• Industrial control interfaces requiring field reconfigurability

Complex Programmable Logic Devices Procurement Notes

Verify the specific speed grade suffix (-80) against the datasheet timing tables to ensure it meets the required system clock frequencies. Confirm that the LT100 package corresponds to the 100-pin TQFP configuration. Check for end-of-life status as older CPLD families may have limited availability or require alternative sourcing strategies.

Complex Programmable Logic Devices Selection Notes

Select this component when designs require high density (256 macrocells) with flexible I/O voltage levels. The -80 speed grade offers a balance between performance and power consumption. Ensure the design fits within the 12,000 gate limit and utilizes the SuperWIDE GLB structure for optimal routing efficiency compared to standard PLD architectures.

Complex Programmable Logic Devices Part Context

This part belongs to the ispLSI 5000VE family, which introduced the SuperWIDE architecture for improved pin-locking capabilities. It serves as a successor to earlier ispLSI series, offering higher density and faster speeds while maintaining compatibility with existing Lattice development tools. The 5256VE variant represents the mid-range density option within this specific generation.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements may be limited due to the age of the 5000VE family. Consider the ispMACH 4000V series for similar functionality with updated manufacturing processes, though architectural differences exist. Verify pinout compatibility if substituting with other Lattice CPLDs.