EPM7256SQC208-7N

Complex Programmable Logic Devices Overview

The EPM7256SQC208-7N is a Complex Programmable Logic Device (CPLD) belonging to the MAX 7000S family, manufactured by Altera. It features an EEPROM-based architecture with 256 macrocells organized into 16 Logic Array Blocks (LABs). The device provides 164 user I/O pins and supports In-System Programming (ISP) via a JTAG interface. Key electrical parameters include a maximum propagation delay of 7.5 ns, a counter frequency of 128.2 MHz, and operation within a 3.0 V to 3.6 V supply voltage range.

Complex Programmable Logic Devices Feature Summary

• MAX 7000S Architecture: Features 256 macrocells, 16 LABs, and 5,000 usable gates with ISP capability via IEEE Std. 1149.1 JTAG.
• High Performance: Achieves a maximum propagation delay of 7.5 ns and a counter frequency of 128.2 MHz.
• I/O Configuration: Offers 164 user I/O pins in a 208-pin PQFP package, supporting 3.3-V or 5.0-V MultiVolt I/O operation.
• Advanced Control: Includes six global output enables, two global clocks, fast input registers, and programmable slew-rate control.

Complex Programmable Logic Devices Applications

• In-system programming of logic functions using standard test equipment or download cables.
• Boundary-scan testing for high-density digital circuits utilizing built-in JTAG BST circuitry.
• Implementation of complex address decoding and bus interfacing in industrial control systems.
• Replacement of discrete gate arrays and PAL/GAL devices in embedded system designs.

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific ordering suffix matches the required speed grade (-7) and package type (PQFP-208). Ensure compliance with RoHS directives and check for moisture sensitivity levels prior to soldering. Note that this part number may be subject to end-of-life status; consult official documentation for current availability and lifecycle information.

Complex Programmable Logic Devices Selection Notes

Select the EPM7256SQC208-7N when designs require 256 macrocells and high-speed performance with a 7.5 ns delay. Choose this model over the non-S variant if In-System Programming (ISP) and JTAG boundary-scan capabilities are necessary. Ensure the design utilizes 3.3 V or 5.0 V power supplies compatible with the MultiVolt I/O feature. Verify that the 208-pin PQFP package fits the PCB footprint constraints.

Complex Programmable Logic Devices Part Context

This component is part of the MAX 7000S series, which enhances the original MAX 7000 family with ISP and JTAG features. It shares architectural similarities with the EPM7256E but adds in-system programmability. The device is designed to replace lower-density PLDs like PALs and GALs while offering reprogrammability advantages over mask-programmed logic.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-compatible replacements within the same family include the EPM7256SQC208-10N, which offers a slower 10 ns speed grade. For designs requiring higher density, consider the MAX 7000A or B series, though these may require voltage level adjustments and do not natively support ISP without additional configuration.