ATF1504ASL-25JU44

Overview

The ATF1504ASL-25JU44 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 frequency of 60 MHz with a maximum pin-to-pin propagation delay of 25 ns. It utilizes EEPROM storage technology, offering 10,000 program/erase cycles and 20-year data retention. The component is housed in a 44-lead TQFP package and supports both 3.3V and 5.0V I/O configurations.

Feature Summary

• 64 Macrocells with flexible logic structure supporting D/T/Latch configurable flip-flops
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• EEPROM non-volatile memory with 10,000 Program/Erase Cycles
• Industrial temperature range operation from -40°C to +85°C

Applications

• Complex logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• PCI-compliant interface designs requiring high current drivers
• JTAG boundary-scan testing and system debugging
• State machine initialization with power-up reset features

Procurement Notes

Verify the specific suffix 'JU44' against official Microchip documentation to confirm package type and temperature grade. Ensure design files include the correct ISP protection settings if programming interruptions are a concern. Confirm voltage supply requirements match the target application's VCCIO specifications.

Selection Notes

Select this model for applications requiring 64 macrocells and industrial temperature stability. The 25 ns speed grade suits systems operating up to 60 MHz. Consider the 'L' variant if automatic microamp standby power management is required. Verify that the 44-pin TQFP footprint matches the PCB layout constraints.

Part Context

This component belongs to the ATF1504AS/L family of CPLDs. It shares architectural features with other variants in the series, such as the ATF1504ASV and ATF1504ASL-25AU44, differing primarily in package style, speed grade, and operating voltage options. The 'ASL' designation indicates the enhanced architecture with low-power standby modes.

Replacement Considerations

Direct replacements within the same family include ATF1504ASL-25AU44 (TQFP-44) or ATF1504ASL-20QC100 (PQFP-100), provided pin compatibility and speed grades meet design requirements. Verify that any substitute maintains the 64 macrocell count and ISP capabilities.