ATF1504AS-7AX44

Overview

The ATF1504AS-7AX44 is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology. It features 64 macrocells with up to 40 product terms per macrocell and supports In-System Programmability (ISP) via JTAG. The device operates at a maximum pin-to-pin delay of 7.5 ns, enabling registered operation up to 125 MHz. It utilizes EEPROM technology for reprogramming and includes advanced power management features such as standby modes and reduced-power options.

Feature Summary

• 64 Macrocells with expandable logic capacity up to 40 product terms
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Maximum propagation delay of 7.5 ns with registered speeds up to 125 MHz
• EEPROM-based non-volatile memory with 10,000 program/erase cycles

Applications

• Logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• PCI-compliant interface designs requiring high current drivers
• Boundary-scan testing and in-system programming applications
• State machine initialization with built-in power-up reset features

Procurement Notes

Verify the specific suffix 'X' against official Microchip documentation to confirm package type and temperature grade, as standard datasheets list PLCC, TQFP, and PQFP variants. Confirm availability status as older CPLD families may have discontinuation notices. Ensure design tools support the ISP protocol for field updates.

Selection Notes

Select this model for designs requiring 64 macrocells and high-speed performance under 7.5 ns delay. Choose based on required I/O count and package constraints (44-pin PLCC or TQFP). Consider the 'L' variant if ultra-low standby current is critical, as the standard AS version has higher standby consumption. Verify voltage compatibility for 3.3V or 5.0V I/O levels.

Part Context

This component belongs to the ATF1504AS/L family of high-density CPLDs. It shares architectural similarities with other devices in the series but differs in pin count and package options. The ATF1504AS provides enhanced routing resources and flexible macrocell configurations compared to earlier generations, supporting complex logic functions with efficient resource utilization.

Replacement Considerations

Direct replacements within the same family include ATF1504AS-10JC84 or ATF1504AS-15AC44, depending on speed and package requirements. Verify pinout compatibility and electrical characteristics before substitution. Consult Microchip's Product Change Notification (PCN) documents for any manufacturing updates affecting equivalent parts.