EPM7256ERC208-20

Complex Programmable Logic Devices Overview

The Altera EPM7256ERC208-20 is a Complex Programmable Logic Device (CPLD) belonging to the MAX 7000 family. It features 256 macrocells organized into 16 Logic Array Blocks (LABs), providing approximately 5,000 usable gates. The device operates at a maximum frequency of 45.5 MHz with a maximum propagation delay of 20 ns. It utilizes EEPROM technology for non-volatile configuration and supports a supply voltage range of 4.75 V to 5.25 V. Housed in a PQFP-208 package, it offers extensive I/O capabilities suitable for high-density logic applications.

Complex Programmable Logic Devices Feature Summary

• 256 Macrocells across 16 Logic Array Blocks (LABs)
• Maximum operating frequency of 45.5 MHz
• EEPROM-based non-volatile memory storage
• PQFP-208 surface-mount package

Complex Programmable Logic Devices Applications

• High-density digital logic replacement
• Address decoding and bus interfacing
• State machine implementation
• Timing control and synchronization circuits

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity due to potential availability from secondary markets. Confirm RoHS compliance status as older variants may differ. Check for moisture sensitivity level requirements during handling and storage. Ensure design compatibility with 5V logic levels. Review datasheet for specific electrical characteristics relevant to the target application environment.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells are sufficient for the design complexity. Consider the 20 ns propagation delay against system timing requirements. Verify that the 5V operating voltage aligns with the rest of the system architecture. The PQFP-208 package requires appropriate PCB footprint design. Evaluate if higher speed grades or different I/O counts are needed for alternative models in the MAX 7000 series.

Complex Programmable Logic Devices Part Context

The EPM7256ERC208-20 is part of the Altera MAX 7000 CPLD family, which was widely used before the dominance of FPGAs. It represents a mature technology offering reliable performance for fixed-function logic applications. The 'E' suffix typically denotes extended temperature ranges or specific manufacturing revisions within the product line. This component serves as a bridge between simple gate arrays and more complex programmable devices.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements may not exist due to the age of the component. Consider Intel/Altera MAX 10 or Cyclone IV families for modern equivalents, though these require significant design adaptation. Generic CPLDs from other manufacturers may offer functional similarities but will necessitate schematic and layout changes.