ATF1500A-12AC

Overview

The ATF1500A-12AC 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. Built on advanced Flash technology, the device supports registered operation at speeds up to 125 MHz with a maximum pin-to-pin delay of 7.5 ns. It offers backward compatibility with ATF1500/L software and hardware, includes programmable pin-keeper inputs, and provides flexible logic macrocell configurations for complex digital designs.

Feature Summary

• High-density CPLD with 32 macrocells and fully connected input/feedback logic array
• Registered operation up to 125 MHz with 7.5 ns maximum pin-to-pin delay
• Advanced Flash technology allowing complete reprogrammability and 20-year data retention
• Flexible macrocell supporting D/T/Latch configurable flip-flops and individual output slew rate control

Applications

• Integration of TTL, SSI, MSI, and classic PLD logic functions
• Complex state machine implementations requiring sequential logic
• System logic replacement in industrial and commercial embedded systems
• Designs requiring low-power standby modes and pin-controlled power-down

Procurement Notes

Verify the specific speed grade suffix (-12) and package type (AC indicates TQFP) against the ordering information table. Confirm that the commercial temperature range (0°C to 70°C) meets application requirements. Check for obsolescence status or recommended replacements if sourcing from legacy distributors, as indicated in the datasheet revision history.

Selection Notes

Select the ATF1500A-12AC when a 12 ns propagation delay and 62.5 MHz maximum frequency are required. Ensure the design utilizes the global bus architecture effectively to leverage the fully connected feedback paths. Consider the ATF1500AL variant if automatic low-power standby mode is necessary, as the standard A version requires pin-controlled power-down.

Part Context

This component belongs to the ATF1500A family of electrically erasable PLDs. It is designed to replace older discrete logic and classic PLDs. The 'AC' suffix denotes the Commercial temperature range and TQFP package. It is part of a lineage that includes the ATF1500L series, offering backward compatibility for existing designs while providing enhanced performance and non-volatile Flash memory technology.

Replacement Considerations

For faster speed grades, the ATF1502AS is a pin-compatible replacement. For other specifications, suggested replacements are available in Green packages. Verify pinout compatibility and electrical characteristics before substitution.