ISPLSI 5512VE-125LF256I

Complex Programmable Logic Devices Overview

The ispLSI 5512VE-125LF256I is a high-density, in-system programmable logic device from the ispLSI 5000VE family. It features 24,000 PLD gates and 512 macrocells organized into sixteen 32-macrocell Generic Logic Blocks (GLBs). The device supports up to 256 I/O pins and 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 80 MHz for the -125 speed grade, a typical propagation delay of 6.5 ns, and EEPROM-based non-volatile storage. It utilizes E2CMOS technology and includes IEEE 1149.1 boundary scan capabilities.

Complex Programmable Logic Devices Feature Summary

• High Density Architecture: 24,000 PLD gates and 512 macrocells distributed across sixteen SuperWIDE Generic Logic Blocks.
• In-System Programmability: Non-volatile EEPROM technology allows reprogramming via standard JTAG interface without removing the device.
• Flexible I/O Configuration: Supports user-selectable 3.3V or 2.5V output levels with independent VCCIO reference.
• High Performance Interconnect: Features a Global Routing Pool (GRP) and Product Term Sharing Array for optimized signal routing.

Complex Programmable Logic Devices Applications

• Complex state machine implementations requiring high pin counts.
• Address decoding and bus bridging in industrial control systems.
• Prototyping and field-upgradeable logic designs in telecommunications infrastructure.
• Interface translation between 5V TTL devices and 3.3V/2.5V logic families.

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix 'LF' against manufacturer documentation to confirm lead-free compliance status, as datasheet references may vary by revision. Confirm availability through authorized distributors, noting that older generation CPLDs may have limited stock or end-of-life implications. Ensure programming tools support the IEEE 1149.1 boundary scan interface required for this device.

Complex Programmable Logic Devices Selection Notes

Select the -125 speed grade when a maximum operating frequency of 80 MHz is sufficient for the design timing requirements. The FPBGA-256 package provides 256 I/O pins; verify pin multiplexing constraints for dedicated clock inputs (CLK2/CLK3) if global clocks are required. Consider the -100 grade if higher performance up to 100 MHz is needed, or the -80/-75 grades for frequencies up to 125 MHz or 155 MHz respectively.

Complex Programmable Logic Devices Part Context

This component belongs to the Lattice ispLSI 5000VE family, which succeeded the ispLSI 5000VA series. The VE family introduced enhanced pin-locking architecture and simplified product term reset logic compared to its predecessor. It serves as a bridge between traditional PAL/GAL replacements and modern FPGA technologies, offering deterministic timing and non-volatile configuration in a dense CPLD form factor.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements within the same package and density are limited due to architectural differences. The ispLSI 5512VA is functionally similar but not JEDEC compatible and may have different pinouts. Modern equivalents such as the MachXO3 or ICE40 UltraPlus families offer comparable logic density but require significant redesign of the logic implementation and power management strategies.