ATF1504AS-15JC44

Overview

The ATF1504AS-15JC44 is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology. It features 64 macrocells with up to 40 product terms per macrocell and supports In-System Programmability (ISP) via JTAG. The device operates at a maximum pin-to-pin delay of 15 ns and supports registered operation up to 76.9 MHz. It utilizes EEPROM technology for reprogramming and includes advanced power management features such as standby modes and programmable pin-keepers.

Feature Summary

• Contains 64 logic macrocells with flexible D/T/Latch configurable flip-flops and global control signals.
• Supports In-System Programmability (ISP) using the industry-standard 4-pin JTAG interface compliant with IEEE Std. 1149.1.
• Features enhanced routing resources including a global bus and regional foldback bus for efficient logic implementation.
• Includes advanced power management with automatic standby, pin-controlled power-down, and reduced-power macrocell options.

Applications

• Logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs in embedded systems.
• PCI-compliant interface designs requiring high current drivers and specific timing characteristics.
• Boundary-scan testing and debugging applications utilizing JTAG BST capabilities.
• State machine initialization and control logic requiring power-up reset features.

Procurement Notes

Verify the package type corresponds to the JC suffix, which indicates a 44-lead PLCC. Confirm the temperature range matches the 'J' suffix designation, typically commercial or industrial depending on the full datasheet ordering guide. Ensure the design tool supports the specific ATF1504AS family constraints for ISP programming.

Selection Notes

Select this model when 64 macrocells are sufficient for the design logic density. The 15 ns speed grade offers a balance between performance and power consumption compared to faster -10 or slower -20 grades. Consider the 44-pin PLCC package if through-hole mounting or specific footprint constraints require it over TQFP alternatives.

Part Context

This component belongs to the ATF1504AS(L) series, which represents Atmel's (now Microchip) high-density CPLD line based on electrically-erasable memory technology. The series is designed for high-reliability applications requiring non-volatile configuration without UV erasure, supporting up to 10,000 program/erase cycles.

Replacement Considerations

Direct replacements within the same package and speed include other ATF1504AS variants with different speed grades (e.g., ATF1504AS-10JC44). For pin-compatible upgrades with higher density, consider the ATF1512 series, though verification of macrocell count and I/O availability is required.