ATF1500AL-20JI

Overview

The ATF1500AL-20JI is a high-performance, high-density electrically erasable complex programmable logic device (CPLD) manufactured by Microchip Technology. It features 32 logic macrocells and up to 36 inputs within a 44-pin Plastic J-leaded Chip Carrier (PLCC) package. The device operates at a maximum pin-to-pin delay of 20 ns and supports registered operation frequencies up to 40 MHz with external feedback. Built on advanced Flash technology, it offers complete reprogrammability with 100 program/erase cycles and 20-year data retention. It functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Advanced Flash Technology: Non-volatile memory providing 100% testing, complete reprogrammability, and 20-year data retention.
• Flexible Macrocell Architecture: Each of the 32 macrocells includes D/T/Latch configurable flip-flops, global/individual register control, and programmable output slew rate.
• Power Management: Includes automatic standby mode and a pin-controlled power-down mode reducing current to less than 10 mA.
• Pin-Keeper Inputs: Programmable circuits prevent unused I/O lines from floating, eliminating unnecessary power consumption and system noise.

Applications

• Replacing TTL, SSI, MSI, and classic PLDs in digital logic designs.
• State machine initialization requiring power-up reset functionality.
• Systems requiring low-power standby modes and pin-controlled power-down capabilities.
• Applications needing secure logic implementation via security fuse features.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation. The provided datasheet indicates that certain variants within this family may have reached end-of-life status or have specific time-buy dates. Confirm availability and lead times directly with authorized distributors or the manufacturer, as stock levels for obsolete or legacy components can vary significantly.

Selection Notes

Select the ATF1500AL-20JI when industrial temperature operation (-40°C to +85°C) is required alongside the low-power characteristics of the 'AL' variant. Ensure the design fits within the 32 macrocell limit and utilizes the 44-pin PLCC package. Consider the 20 ns propagation delay for timing closure; if higher speed is needed, evaluate faster speed grades or alternative devices like the ATF1502AS.

Part Context

This component belongs to the ATF1500A(L) series of high-density CPLDs. The 'AL' designation typically denotes enhanced power management features compared to the standard 'A' variant. The 'J' suffix identifies the 44-lead PLCC package, while 'I' specifies the industrial temperature range. This series is designed for backward compatibility with earlier ATF1500/L software and hardware tools.

Replacement Considerations

For the 7 ns speed grade, the ATF1502AS is a pin-compatible replacement. For other speed grades, suggested replacements are available in Green packages. Verify specific cross-reference compatibility with the manufacturer before substitution.