ATF1502ASL-25JI44

Overview

The ATF1502ASL-25JI44 is a high-performance, electrically-erasable CPLD from Microchip Technology. It features 32 macrocells with up to 40 expandable product terms per macrocell and operates at a maximum pin-to-pin delay of 25 ns. Registered operation supports frequencies up to 50 MHz. The device utilizes advanced EEPROM technology for complete reprogrammability (10,000 cycles) and includes in-system programmability via JTAG. It offers low-power standby modes, including automatic 10 µA standby for the 'L' version, and is available in commercial and industrial temperature ranges.

Feature Summary

• 32 Macrocells with flexible D/T/Latch configurable flip-flops and up to 40 expandable product terms
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Advanced Power Management: Automatic 10 µA standby mode and pin-controlled power-down mode (<5 mA)
• Enhanced routing resources with global bus and regional foldback logic for complex functions

Applications

• PCI-compliant interface designs requiring high current drivers
• High-density logic integration replacing TTL/SSI/MSI/LSI PLDs
• State machine initialization with power-up reset feature
• Applications requiring field design modifications via software ISP

Procurement Notes

Verify the specific suffix '25JI44' against the manufacturer's official ordering guide to confirm package type (PLCC or TQFP), temperature range (Commercial or Industrial), and speed grade. Ensure compatibility with existing JTAG programming hardware and software tools for In-System Programming.

Selection Notes

Select this model for designs requiring 32 macrocells and low-power consumption. The 'L' variant provides significantly lower standby current (10 µA) compared to the standard 'AS' version. Consider the 25 ns speed grade for applications operating below 50 MHz registered frequency. Verify that the 44-pin package fits the PCB footprint constraints.

Part Context

This component belongs to the ATF1502AS(L) family of Complex Programmable Logic Devices. It shares architectural features such as the macrocell structure, JTAG interface, and EEPROM technology with other members like ATF1502ASV and ATF1502ASL variants, differing primarily in speed grades, packaging, and temperature ratings.

Replacement Considerations

Direct replacements within the same family include ATF1502AS-25JI44 (standard power) or ATF1502ASV-25JI44 (different package). Cross-family replacements may require logic restructuring due to differences in macrocell count and I/O configurations.