ATF1504ASL-25AI44

Overview

The ATF1504ASL-25AI44 is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) from the ATF1504AS/L series. It features 64 macrocells with up to 40 product terms per macrocell and supports registered operation up to 125 MHz. The device offers a maximum pin-to-pin delay of 25 ns and operates on a 5.0V supply voltage. It utilizes In-System Programmability (ISP) via JTAG and includes advanced power management features such as standby modes. The component is housed in a 44-lead TQFP package and is rated for industrial temperature ranges.

Feature Summary

• 64 Macrocells with expandable logic structure supporting up to 40 product terms per macrocell
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Maximum pin-to-pin propagation delay of 25 ns with registered operation up to 125 MHz
• Advanced power management including automatic standby and pin-controlled power-down modes

Applications

• High-performance logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• PCI-compliant interface designs requiring high current drivers
• Digital design execution of boot loader functions
• Loading configuration data for Field Programmable Gate Arrays (FPGAs)

Procurement Notes

Verify the specific suffix 'AI44' against official Microchip documentation to confirm the exact temperature range and package variant, as datasheets typically list 'SL' for commercial/industrial TQFP options. Ensure the ordering information matches the required voltage and speed grade specifications for the target application.

Selection Notes

Select this model for applications requiring 64 macrocells and 32 I/O pins in a compact 44-lead TQFP package. Choose the -25 speed grade if the system timing allows for a maximum 25 ns delay. Consider the 'L' variant only if ultra-low standby current is critical, noting that standard versions offer different power characteristics.

Part Context

This component belongs to the ATF1504AS/L family of CPLDs, which are designed using Atmel's proven electrically-erasable memory technology. The family provides enhanced routing resources and flexible macrocells suitable for complex combinational and sequential logic designs across various industrial and commercial applications.

Replacement Considerations

Direct replacements within the same family include other ATF1504AS variants with different speed grades or packages, such as ATF1504ASL-25AU44. Verify pin compatibility and electrical specifications before substituting.