ISPGDS22-7J

Complex Programmable Logic Devices Overview

The ISPGDS22-7J is a high-density Generic Digital Signal (GDS) device from Lattice Semiconductor's ispGDX family, designed to replace complex discrete logic and boundary scan components. Operating at the -7 speed grade, it features 22 macrocells with a maximum system clock frequency of 300 MHz. The device utilizes Lattice's proprietary non-volatile CMOS Flash technology, allowing for infinite reconfiguration without external configuration memory. It supports standard VHDL and Verilog design entry through the ispLEVER Classic software suite.

Complex Programmable Logic Devices Feature Summary

• Non-volatile Flash architecture enabling instant-on operation and infinite reprogrammability
• High-speed performance with 300 MHz max system clock at -7 grade
• 22 Macrocells providing equivalent density to legacy GALs and CPLDs
• Supports JTAG boundary scan testing via dedicated I/O pins

Complex Programmable Logic Devices Applications

• Replacement for obsolete boundary scan bus devices
• Discrete logic consolidation in industrial control systems
• Address decoding and chip select generation
• State machine implementation in embedded systems

Complex Programmable Logic Devices Part Context

The ISPGDS22-7J belongs to the ispGDX series, which bridges the gap between simple programmable logic devices (PLDs) and complex programmable logic devices (CPLDs). This series is specifically engineered to address the industry need for replacing aging discrete logic families and boundary scan chips with a single, flexible, and reprogrammable solution that maintains low power consumption and small form factors.

Complex Programmable Logic Devices Replacement Considerations

This component serves as a direct functional replacement for specific boundary scan drivers and complex discrete logic gates. Designers should verify pin compatibility and timing requirements when migrating from legacy boundary scan ICs or older GAL/CPLD generations to ensure signal integrity and protocol compliance.