ATF1500A-15AC

Overview

The ATF1500A-15AC is a high-performance, high-density complex programmable logic device (CPLD) manufactured by Microchip Technology. Built on advanced Flash technology, it features 32 logic macrocells and up to 36 inputs within a 44-pin package. The component supports registered operation at speeds up to 125 MHz with a maximum pin-to-pin delay of 7.5 ns. It operates on a 5V power supply and includes flexible macrocell configurations, global input/feedback architecture, and programmable output slew rates for noise reduction.

Feature Summary

• Advanced Flash Technology: Non-volatile memory offering 100 program/erase cycles, 20-year data retention, and complete reprogrammability without requiring external erase signals.
• Flexible Macrocell Architecture: Each of the 32 macrocells includes configurable D/T/Latch flip-flops, individual register control signals, and programmable output enable functions.
• Global Busing System: A fully connected global bus provides all input and I/O signals to every macrocell, simplifying logic placement and eliminating pinout changes during design modifications.
• Power Management Features: Includes automatic standby mode, pin-controlled power-down capability reducing current to under 10 mA, and programmable pin-keeper circuits to prevent floating inputs.

Applications

• Integration of TTL, SSI, MSI, and classic PLD logic into single-chip solutions.
• Sequential logic operations requiring registered feedback and high-speed processing up to 125 MHz.
• Systems requiring low-power standby modes and controlled output slew rates to minimize electromagnetic interference.

Procurement Notes

Verify that the specific ordering code matches the required speed grade and package type, as the ATF1500A series offers multiple variants. Confirm temperature range requirements, noting that the 'AC' suffix denotes commercial operation (0°C to 70°C). Ensure compatibility with existing third-party design tools and programmers supported by the manufacturer's documentation.

Selection Notes

Select this component when a high-density CPLD with 32 macrocells and 44 pins is needed for designs requiring backward compatibility with older ATF1500/L software. Consider the 7.5 ns delay and 125 MHz registered speed for timing-critical applications. Evaluate the need for industrial temperature ranges or lower power consumption options if operating conditions exceed commercial limits.

Part Context

The ATF1500A series belongs to Microchip's family of electrically erasable complex programmable logic devices. It serves as a successor to earlier PLD technologies, providing enhanced density and flexibility through its Flash-based architecture. The device is designed to replace discrete logic components, reducing board space and complexity while maintaining pin compatibility with common legacy devices.

Replacement Considerations

For fast-speed grades, the ATF1502AS is a pin-compatible replacement. For other speed grades, suggested replacements are available in Green packages. Verify specific pinout and electrical parameter compatibility before substituting.