ISPLSI 2128VE-135LT176I

Complex Programmable Logic Devices Overview

The ispLSI 2128VE-135LT176I is a high-density, in-system programmable logic device manufactured by Lattice Semiconductor. It features 6000 PLD gates, 128 macrocells, and 28 I/O pins within a 176-pin TQFP package. Operating at a supply voltage of 3.3V, the device supports a maximum frequency of 135 MHz with a propagation delay of 4.0 ns. The architecture includes 32 Generic Logic Blocks (GLBs), three dedicated clock inputs, and eight dedicated input pins. It utilizes non-volatile EEPROM technology for reprogrammability and is fully IEEE 1149.1 boundary scan testable.

Complex Programmable Logic Devices Feature Summary

• High-performance E2CMOS technology enabling 135 MHz operation with 4.0 ns propagation delay
• In-system programmability via Boundary Scan Test Access Port (TAP) using ISP technology
• 128 Macrocells organized into 32 Generic Logic Blocks (GLBs) with a Global Routing Pool
• TTL-compatible I/O levels allowing direct interfacing with standard 5V devices

Complex Programmable Logic Devices Applications

• Complex state machine implementations requiring fast global interconnectivity
• Address decoding and wide input gating applications
• Prototyping systems utilizing in-system reprogrammability
• Mixed-voltage interface logic between 3.3V and 5V components

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized Lattice Semiconductor distributors or certified suppliers. Confirm the specific -135 speed grade and LT176 package variant matches design requirements. Check for RoHS compliance status as indicated in official documentation. Ensure storage conditions adhere to moisture sensitivity levels specified in the datasheet prior to soldering.

Complex Programmable Logic Devices Selection Notes

Select this model when designs require 128 macrocells and 28 I/Os in a 176-pin TQFP form factor. The -135 speed grade is suitable for applications needing 135 MHz performance. Consider the 2128VE-250 variant if higher speeds up to 250 MHz are required. Ensure the design utilizes the available three dedicated clock pins and eight dedicated inputs effectively.

Complex Programmable Logic Devices Part Context

This component belongs to the ispLSI 2128VE family, which offers 100% functional and pinout compatibility with the older ispLSI 2128V series. The VE series introduces enhanced features such as open-drain output options and improved slew rate control. It represents a transition point in Lattice's CPLD portfolio, bridging traditional PLD ease of use with FPGA-like density.

Complex Programmable Logic Devices Replacement Considerations

The ispLSI 2128VE-250LT176I serves as a higher-speed alternative within the same package and pinout configuration. For legacy replacements, the ispLSI 2128V-135LT176I is functionally compatible but lacks the specific VE enhancements. Verify that any substitute maintains the 3.3V operating voltage and EEPROM-based non-volatility.