ATF1504ASL-20AC44

Overview

The ATF1504ASL-20AC44 is a high-density, electrically-erasable Complex Programmable Logic Device (CPLD) from the ATF1504AS/L series. It features 64 macrocells with up to 68 I/O pins and utilizes EEPROM storage technology. The device operates at a maximum frequency of 83.3 MHz with a typical propagation delay of 20 ns. It supports both 5V and 3.3V I/O configurations and includes In-System Programmability (ISP) via JTAG. The component is housed in a PQFP-100 package and is rated for commercial temperature ranges.

Feature Summary

• 64 Macrocells with expandable logic capacity up to 40 product terms per macrocell
• In-System Programmability (ISP) compliant with IEEE Std. 1149.1
• EEPROM non-volatile memory supporting 10,000 program/erase cycles
• Supports 3.3V or 5.0V I/O pins with programmable slew rates

Applications

• Complex logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• PCI-compliant interface designs requiring high current drivers
• Systems requiring field-upgradable logic via JTAG boundary-scan testing

Procurement Notes

Verify the specific suffix 'AC44' against official Microchip documentation to confirm pinout and electrical characteristics for the PQFP-100 package. Confirm RoHS compliance status as datasheet references may vary by revision. Ensure design tools support the ATF1504AS family architecture for successful compilation.

Selection Notes

Select this model for applications requiring 64 macrocells and high pin counts in a surface-mount package. Compare the 20 ns speed grade against faster -15 or -10 variants if timing constraints are tighter. Consider the ATF1504ASL variant if low-power standby modes are required for the specific application environment.

Part Context

This part belongs to the ATF1504AS/L family of CPLDs, which offers enhanced routing resources and flexible macrocell architectures. The 'L' designation typically indicates low-power features, while the 'A' denotes advanced technology revisions. The PQFP-100 package provides extensive I/O capabilities for complex digital logic implementations.

Replacement Considerations

Direct replacements within the same family include ATF1504ASL-15AC44 for faster performance or ATF1504ASL-25AC44 for lower cost/speed options. Verify pin compatibility and electrical specifications before substitution.