EPM3256ATC144-7

Complex Programmable Logic Devices Overview

The Altera EPM3256ATC144-7 is a Complex Programmable Logic Device (CPLD) belonging to the MAX 3000A family. It features 256 macrocells organized into 16 Logic Array Blocks (LABs) and provides up to 161 user I/O pins in a 144-pin Thin Quad Flat Pack (TQFP). The device utilizes CMOS EEPROM technology, operates at a 3.3 V supply voltage, and supports In-System Programming (ISP) via the IEEE Std. 1149.1 JTAG interface. Key electrical parameters include a maximum propagation delay of 7.5 ns, a setup time of 5.2 ns, and a maximum counter frequency of 126.6 MHz.

Complex Programmable Logic Devices Feature Summary

• Features MultiVolt I/O interface compatible with 5.0-V, 3.3-V, and 2.5-V logic levels while maintaining a 3.3 V core.
• Supports high-performance ISP through IEEE Std. 1149.1 JTAG and IEEE Std. 1532 compliance.
• Includes enhanced architectural resources such as shareable and parallel expander product terms for complex logic synthesis.
• Provides programmable speed/power optimization allowing individual macrocell power reduction.

Complex Programmable Logic Devices Applications

• PCI Local Bus interface design compliant with PCI SIG Revision 2.2 specifications.
• Mixed-voltage system integration requiring 5V, 3.3V, and 2.5V signal compatibility.
• In-system programming applications utilizing JTAG boundary-scan testing.

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity and physical condition upon receipt. Confirm package integrity and pin alignment against TQFP-144 specifications. Ensure storage conditions comply with moisture sensitivity level requirements prior to soldering. Review datasheet revision history for any updates to timing or electrical characteristics.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells and 161 user I/Os are required within a 144-pin footprint. The -7 speed grade offers a 7.5 ns delay suitable for moderate-speed applications. Consider alternative speed grades (-4, -5, -6, -10) if timing constraints differ. Verify that the target system supports 3.3 V operation and JTAG-based configuration workflows.

Complex Programmable Logic Devices Part Context

This component is part of the MAX 3000A series, which bridges the gap between standard PLDs and higher-density FPGAs. The architecture supports 100% TTL emulation and integrates seamlessly with Altera development tools like Quartus II. It replaces legacy GALs and PALs in designs requiring reprogrammability and higher density.

Complex Programmable Logic Devices Replacement Considerations

Compatible speed grades within the same package include EPM3256ATC144-4, EPM3256ATC144-5, EPM3256ATC144-6, and EPM3256ATC144-10. These variants share identical pinouts and functionality but differ in propagation delay and maximum operating frequency.