ATF1502AS-7AX44

Overview

The ATF1502AS-7AX44 is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) from Microchip Technology. It features 32 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 7.5 ns and operates on a 5V supply voltage. It includes In-System Programmability (ISP) via JTAG, enhanced routing resources, and advanced power management features such as automatic standby modes. The component is available in commercial and industrial temperature ranges.

Feature Summary

• 32 Macrocells with expandable logic capacity up to 40 product terms per macrocell
• Maximum propagation delay of 7.5 ns with registered operation up to 125 MHz
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Advanced power management including pin-controlled standby and reduced-power macrocell options

Applications

• PCI-compliant interface designs requiring high current drivers
• Logic integration replacing TTL, SSI, MSI, or classic PLDs
• Systems requiring field design modifications via software updates
• Applications needing secure logic protection with security fuse features

Procurement Notes

Verify the specific package type required for the -7A suffix, as the datasheet lists 44-lead PLCC and TQFP options. Confirm that the commercial temperature range (0°C to 70°C) meets system requirements, as industrial variants (-L) offer extended ranges. Ensure JTAG pins are reserved if ISP functionality is utilized during production.

Selection Notes

Select this model for designs requiring 32 macrocells and 5V logic levels. Consider the -L variant if industrial temperature operation (-40°C to 85°C) or lower standby current is needed. Verify that the 7.5 ns delay specification aligns with timing constraints. Check if the 44-pin count suffices for I/O requirements, noting that four pins may be dedicated to JTAG if ISP is active.

Part Context

This component belongs to the ATF1502AS(L) series of high-density CPLDs. It utilizes Atmel's proven EEPROM technology, allowing for complete reprogrammability with 10,000 program/erase cycles. The series is designed for high performance and density, integrating logic functions while maintaining low power consumption through various standby modes.

Replacement Considerations

Direct replacements within the same family include ATF1502ASL variants for extended temperature ranges. Cross-family replacements should consider other Microchip ATF15xx series devices with similar macrocell counts and I/O configurations.