ATF1502ASV-20AI44

Overview

The ATF1502ASV-20AI44 is a high-performance, electrically erasable complex programmable logic device (CPLD) manufactured by Microchip Technology. It features 32 macrocells with up to 36 inputs and operates within a 3.0V to 3.6V supply range. The device supports in-system programming via JTAG and offers a maximum pin-to-pin delay of 20 ns with registered operation up to 83.3 MHz. It utilizes advanced EEPROM technology for complete reprogrammability and includes enhanced routing resources for efficient logic implementation.

Feature Summary

• 32 Macrocells with 5 product terms each, expandable to 40 via cascade logic
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Advanced EEPROM technology with 10,000 program/erase cycles and 20-year data retention
• Pin-controlled power-down mode reducing standby current to 0.75 mA

Applications

• Logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• Design modifications in the field via software updates
• Boundary-scan testing compliant with IEEE Std. 1149.1

Procurement Notes

Verify package availability as the ATF1502ASV series has reached end-of-life status. Confirm RoHS compliance and lead-free options when sourcing replacements. Check for last-time buy dates or obsolescence notices from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component for designs requiring 32 macrocells and ISP capabilities. Ensure the operating voltage matches the 3.0V–3.6V range. Consider the -20 speed grade if a 20 ns max delay is acceptable, offering potential cost benefits over faster variants while maintaining sufficient performance for many control applications.

Part Context

This part belongs to the ATF1502ASV family of CPLDs. It shares architectural similarities with other devices in the ATF1500 series but offers specific I/O counts and timing characteristics. The 'AI' suffix indicates an industrial temperature range (-40°C to +85°C) and TQFP packaging.

Replacement Considerations

Direct substitutes include ATF1502ASV-15AI44 for faster switching speeds. For legacy compatibility, check ATF1502ASV-20AC44 for commercial temperature variants. Verify pinout compatibility when migrating between different package types like PLCC or TQFP.

FAQ

What is the maximum number of product terms available per macrocell?

Each macrocell has 5 product terms, which can be expanded up to 40 product terms using the cascade logic feature.

How does the device handle unused input pins?

The ATF1502ASV offers a programmable pin-keeper option that holds floating input and I/O pins at their previous state, preventing unnecessary power consumption and system noise.

Is the device compatible with standard JTAG boundary-scan testing?

Yes, it supports JTAG boundary-scan testing to IEEE Std. 1149.1-1990 and 1149.1a-1993 standards.