ATF1500AL-20JC

Overview

The ATF1500AL-20JC is a high-performance, high-density electrically erasable complex programmable logic device (CPLD) manufactured by Microchip Technology. It features 32 macrocells and up to 36 inputs within a 44-pin Plastic J-leaded Chip Carrier (PLCC) package. The device operates on a 5V supply with a maximum pin-to-pin propagation delay of 20 ns and supports registered operation at frequencies up to 40 MHz. Built on advanced Flash technology, it offers complete reprogrammability with 100 program/erase cycles and 20-year data retention. Key features include automatic low-power standby modes, pin-controlled power-down capability, and programmable output slew rates for noise reduction.

Feature Summary

• High-density architecture with 32 flexible logic macrocells and fully connected global/regional buses.
• Advanced Flash memory technology enabling 100% testing, full reprogrammability, and 20-year data retention.
• Automatic 3 mA standby mode and pin-controlled power-down mode reducing current to below 10 mA.
• Programmable pin-keeper circuits prevent floating inputs, eliminating the need for external pull-up resistors.

Applications

• Logic integration replacing TTL, SSI, MSI, and classic PLDs in industrial control systems.
• State machine implementation requiring reliable power-up reset initialization.
• Low-power embedded applications utilizing automatic standby and pin-controlled power-down features.

Procurement Notes

Verify the specific ordering suffix 'JC' corresponds to the 44-lead PLCC package and Commercial temperature range (0°C to 70°C). Confirm that the 'L' variant indicates the low-power version with 3 mA standby current. Check for end-of-life status or obsolescence notices from the manufacturer, as older CPLD families may have limited availability or require design-in replacements.

Selection Notes

Select the ATF1500AL-20JC when 32 macrocells are sufficient for the design logic density. Ensure the 20 ns speed grade meets the system timing requirements, specifically noting the 40 MHz maximum frequency for external feedback configurations. Verify that the 5V operating voltage aligns with the target system's power supply rails. Consider the PLCC package if through-hole mounting is required for the PCB layout.

Part Context

This component belongs to the ATF1500A(L) family of high-performance EPLDs. The 'AL' designation specifies the low-power variant with enhanced standby current characteristics compared to the standard ATF1500A. The 'J' suffix denotes the PLCC package, while 'C' indicates the commercial temperature range. This part is backward compatible with earlier ATF1500/L software and hardware designs.

Replacement Considerations

For the -7 speed grade, the ATF1502AS is a pin-compatible replacement. For other speed grades, suggested replacements are available in Green packages. Verify pin compatibility and electrical specifications before substituting.