EPM7256BFC256-5

Complex Programmable Logic Devices Overview

The Altera EPM7256BFC256-5 is a Complex Programmable Logic Device (CPLD) belonging to the MAX 7000B family. It features 256 macrocells, 16 Logic Array Blocks (LABs), and 5,000 usable gates. The device operates at a 2.5-V supply voltage with I/O pins compatible with 3.3-V, 2.5-V, and 1.8-V logic levels. It provides up to 164 user I/O pins in a 256-pin FineLine BGA package. Key electrical parameters include a maximum propagation delay of 5.0 ns and a counter frequency of 188.7 MHz.

Complex Programmable Logic Devices Feature Summary

• High-performance 2.5-V CMOS EEPROM-based architecture with pin-to-pin delays as fast as 5.0 ns.
• Supports MultiVolt I/O interface for compatibility with 3.3-V, 2.5-V, and 1.8-V logic levels.
• Advanced In-System Programmability (ISP) via IEEE Std. 1149.1 JTAG interface compliant with IEEE Std. 1532.
• Configurable macrocells with up to 32 product terms using shareable and parallel expanders.

Complex Programmable Logic Devices Applications

• Mixed-voltage system integration requiring 2.5-V core logic with 3.3-V or 1.8-V I/O interfaces.
• High-density logic replacement for PALs, GALs, and pLSI devices.
• Applications requiring hot-socketing operation and field reprogrammability.
• PCI-compatible designs utilizing built-in boundary-scan test circuitry.

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific suffix FC256 corresponds to the FineLine BGA package variant. Check for end-of-life status or obsolescence notices, as older CPLD families may have limited availability or require alternative sourcing strategies.

Complex Programmable Logic Devices Selection Notes

Select this model when a 2.5-V core voltage is required alongside multi-voltage I/O tolerance. Ensure the design utilizes the FineLine BGA footprint, which supports SameFrame pin-out migration to other densities within the same package family. Verify that the 164 I/O count and 256 macrocells meet the logic density requirements compared to lower-density alternatives like the EPM7128B.

Complex Programmable Logic Devices Part Context

The EPM7256BFC256-5 is part of the MAX 7000B series, designed for high-density applications using second-generation Multiple Array MatriX architecture. It is pin-compatible with the MAX 7000S and MAX 7000A families, facilitating migration between different voltage domains while maintaining the same physical footprint.

Complex Programmable Logic Devices Replacement Considerations

Pin-compatible replacements within the same package include other MAX 7000B devices such as the EPM7512B for higher density or EPM7128B for lower density. Cross-family migration to MAX 7000A (3.3-V) or MAX 7000S (5.0-V) is possible due to pin compatibility, though voltage level adjustments are necessary.