EPM3256AQI208-10N

Complex Programmable Logic Devices Overview

The Altera EPM3256AQI208-10N is a Complex Programmable Logic Device (CPLD) belonging to the MAX 3000A family. It features 5,000 usable gates, 256 macrocells organized into 16 Logic Array Blocks (LABs), and up to 161 user I/O pins. The device operates at a 3.3 V supply voltage with a maximum propagation delay of 7.5 ns and a counter frequency of 126.6 MHz. It utilizes CMOS EEPROM technology for non-volatile configuration and supports In-System Programming (ISP) via an IEEE Std. 1149.1 JTAG interface.

Complex Programmable Logic Devices Feature Summary

• EEPROM-based architecture allowing reprogramming up to 100 times without external configuration memory.
• MultiVolt I/O interface supporting 5.0-V, 3.3-V, and 2.5-V logic levels while the core runs at 3.3 V.
• In-System Programmability (ISP) compliant with IEEE Std. 1149.1 and IEEE Std. 1532 standards.
• Programmable speed/power optimization enabling individual macrocell power reduction of over 50%.

Complex Programmable Logic Devices Applications

• PCI Local Bus compatible logic functions.
• Mixed-voltage system interfacing and level translation.
• High-density SSI, MSI, and LSI logic replacement.
• Industrial temperature range applications (-40°C to +85°C).

Complex Programmable Logic Devices Procurement Notes

Verify the specific ordering suffix 'QI' against official documentation to confirm package type and temperature grade. Confirm current lifecycle status as MAX 3000A devices may be discontinued or subject to last-time buy notices. Ensure programming hardware compatibility with ISP requirements.

Complex Programmable Logic Devices Selection Notes

Select this model for designs requiring 256 macrocells and high-speed performance within the MAX 3000A family. Compare timing parameters against other speed grades (-4, -5, -6, -7) if lower delays are required. Consider pin count constraints in the 208-pin PQFP package when evaluating I/O availability.

Complex Programmable Logic Devices Part Context

This component is part of the MAX 3000A family, which succeeded earlier MAX CPLD generations. It offers enhanced ISP features and higher density compared to predecessors like the MAX 7000 series. The device is designed for cost-effective, high-performance programmable logic solutions using advanced CMOS technology.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements within the same family include EPM3256A variants with different speed grades or packages. Cross-family migration to MAX II or MAX V requires significant architectural changes due to differences in configuration technology and I/O capabilities.

Complex Programmable Logic Devices FAQ

What is the maximum number of product terms per macrocell?

Each macrocell can utilize up to 32 product terms, combining five dedicated terms with shareable and parallel expander product terms from adjacent macrocells.

How does the device handle power-up states?

All registers are cleared upon power-up by default, driving registered outputs low. The Quartus II software allows setting registered outputs to drive high using the NOT Gate Push-Back method.

Is the device compatible with PCI specifications?

Yes, MAX 3000A devices in speed grades -4 through -10 are compatible with the timing requirements of the PCI Special Interest Group (PCI SIG) PCI Local Bus Specification, Revision 2.2.