ISPLSI 5256VA-100LQ208

Complex Programmable Logic Devices Overview

The ispLSI 5256VA is a high-density, in-system programmable logic device based on E2CMOS technology. It features 12,000 PLD gates and 256 macrocells organized into SuperWIDE Generic Logic Blocks (GLBs). The device operates at a maximum frequency of 125 MHz with a propagation delay of 7.5 ns. It supports a 3.3V core supply with user-selectable 3.3V or 2.5V I/O levels via the VCCIO pin. Key specifications include up to 192 I/O pins, 256 registers, and four dedicated global clock inputs.

Complex Programmable Logic Devices Feature Summary

• SuperWIDE Architecture: Utilizes 32 GLBs with wrap-around product term sharing for optimized performance.
• High Performance: Achieves fmax = 125 MHz and tpd = 7.5 ns using enhanced E2CMOS technology.
• In-System Programmability: Supports non-volatile reprogramming via IEEE 1149.1 Boundary Scan interface.
• Flexible I/O: Features SASPI/O with programmable slew rates, bus hold, pull-ups, and open-drain capabilities.

Complex Programmable Logic Devices Applications

• Complex state machine implementations
• Address decoding and counter circuits
• Interface bridging between 5V TTL and 3.3V/2.5V systems

Complex Programmable Logic Devices Procurement Notes

Verify package compatibility; the model suffix LQ208 indicates a 208-pin PQFP package, while datasheet electricals often reference BGA variants. Confirm operating temperature range (Commercial 0°C to +70°C or Industrial -40°C to +85°C) matches system requirements. Ensure design tools support the specific ispLSI 5000V family programming constraints.

Complex Programmable Logic Devices Selection Notes

Select this device for designs requiring high gate density (12,000 gates) with low power consumption options. The SuperWIDE GLB structure allows efficient routing for large logic blocks. Consider the 208-pin PQFP package for through-hole or standard surface mount assembly if BGA options are unsuitable. Verify that the required number of I/O pins does not exceed 192.

Complex Programmable Logic Devices Part Context

The ispLSI 5256VA belongs to the ispLSI 5000V family, which provides 3.3V non-volatile in-system programmability. This family ranges from 256 to 512 macrocells and is designed for high-density applications requiring rapid debugging and field updates without removing components from the PCB.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same family include the ispLSI 5384VA (512 macrocells) or ispLSI 5256VA in alternative packages like fpBGA. Cross-family migration to newer Lattice platforms requires significant architectural redesign due to differences in logic cell structures and I/O standards.