ATF1504ASL-20JC44

Overview

The ATF1504ASL-20JC44 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 20 ns and a registered frequency of 83.3 MHz. It utilizes EEPROM technology for reprogramming and includes advanced power management features such as standby modes. The component is housed in a 44-lead PLCC package and supports both 3.3V and 5.0V I/O configurations.

Feature Summary

• 64 Macrocells with flexible logic structure supporting D/T/Latch configurable flip-flops
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Maximum propagation delay of 20 ns with registered operation up to 83.3 MHz
• Advanced power management including automatic standby and pin-controlled power-down modes

Applications

• Logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs
• PCI-compliant interface designs requiring high current drivers
• JTAG boundary-scan testing and system debugging applications
• State machine initialization and control logic with power-up reset features

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type and temperature range. Ensure design files account for the 44-lead PLCC footprint and verify voltage supply requirements for the selected VCCIO configuration before procurement.

Selection Notes

Select this model for designs requiring 64 macrocells with ISP capabilities in a compact 44-pin package. Consider the -20 speed grade if a maximum 20 ns delay is sufficient. Verify compatibility with 3.3V or 5.0V I/O levels based on system requirements and ensure the design tool supports the ATF1504AS series architecture.

Part Context

This component belongs to the ATF1504AS/L family of CPLDs from Microchip Technology. The 'L' suffix typically denotes low-power variants with automatic standby features, while 'AS' indicates enhanced routing resources. The 'JC' prefix specifies the 44-lead PLCC package and commercial temperature range, distinguishing it from industrial or TQFP variants within the same logical family.

Replacement Considerations

Direct replacements must match the 64 macrocell count, 44-lead PLCC package, and 20 ns speed grade. Verify that alternative CPLDs support JTAG ISP and similar power management features. Cross-reference pinouts carefully as I/O assignments may differ between manufacturers.