ATF1500A-7AC

Overview

The ATF1500A-7AC is a high-performance, high-density electrically erasable complex programmable logic device (CPLD) manufactured by Microchip Technology. It features 32 logic macrocells and up to 36 inputs within a 44-pin package. The device utilizes advanced Flash technology, allowing for complete reprogrammability with 100 program/erase cycles and 20-year data retention. Key electrical specifications include a maximum pin-to-pin delay of 7.5 ns, registered operation speeds up to 125 MHz, and a 5V power supply requirement. It supports both commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges.

Feature Summary

• High-density architecture with 32 macrocells and fully connected input/feedback logic array
• Advanced Flash technology enabling 100% testing, complete reprogrammability, and 20-year data retention
• Flexible macrocell design supporting D/T/Latch configurable flip-flops and global/individual register control
• Built-in speed and power management including automatic standby mode and pin-controlled power-down

Applications

• Integration of TTL, SSI, MSI, and classic PLD logic functions
• State machine initialization requiring power-up reset capabilities
• System noise reduction through programmable output slew rate control
• Applications requiring pin-keeper circuits to prevent floating inputs

Procurement Notes

Verify the specific ordering suffix to confirm package type and temperature range. The 'AC' suffix indicates a 44-lead TQFP package with a commercial operating temperature range of 0°C to 70°C. Ensure compatibility with existing design software and third-party tools supported by the ATF1500A series. Check for end-of-life status or recommended replacements if sourcing for new designs.

Selection Notes

Select the ATF1500A-7AC when a maximum pin-to-pin delay of 7.5 ns and registered operation up to 125 MHz are required. Choose this part over slower variants if system timing constraints demand higher performance. Consider the 44-lead TQFP package for surface-mount applications. Verify that the 5V supply voltage aligns with the system's power distribution network.

Part Context

The ATF1500A-7AC belongs to the ATF1500A(L) family of CPLDs from Microchip Technology (formerly Atmel). This family is designed for backward compatibility with earlier ATF1500/L software and hardware. The device offers pin-compatible options in both TQFP and PLCC packages, facilitating easy upgrades or replacements in existing designs without PCB layout changes.

Replacement Considerations

For fast-speed grade replacements, the ATF1502AS is noted as pin-compatible. Other suggested replacements are available in Green packages. Verify specific replacement part numbers against current manufacturer documentation as older models may have been obsoleted.