ATF1504AS-10JI68

Overview

The ATF1504AS-10JI68 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 68 I/O pins in a 68-lead PLCC package. The device offers a maximum pin-to-pin delay of 10 ns and registered operation up to 125 MHz. It operates on a 5V supply voltage within the commercial temperature range of 0°C to 70°C. Key capabilities include In-System Programmability (ISP) via JTAG, enhanced routing resources, and advanced power management features such as standby modes.

Feature Summary

• 64 Macrocells with flexible logic structure supporting D/T/Latch flip-flops and combinatorial outputs
• In-System Programmability (ISP) via standard 4-pin JTAG interface compliant with IEEE Std. 1149.1
• Enhanced routing switch matrices allowing up to 40 product terms per macrocell for complex logic functions
• Advanced power management including automatic standby mode and pin-controlled power-down capability

Applications

• Logic integration replacing TTL, SSI, MSI, LSI, and classic PLDs in digital systems
• PCI-compliant interface designs requiring high current drivers and specific timing characteristics
• Systems requiring in-field design modifications through software-based ISP updates
• Applications needing reduced power consumption during inactive periods via automatic standby features

Procurement Notes

Verify the specific ordering suffix 'JI' corresponds to the 68-lead PLCC package and commercial temperature grade (-40°C to 85°C industrial or 0°C to 70°C commercial) as defined in the official Microchip ordering guide. Confirm that the '10' speed grade matches the required 10 ns maximum propagation delay for the target application timing constraints.

Selection Notes

Select this component when 64 macrocells are sufficient for the design complexity and a 68-pin surface-mount or leaded package is preferred. Ensure the system operates at 5V if using the standard AS variant, or verify compatibility if considering the AL variant for lower power. Check if JTAG boundary-scan testing is required; if not, the four JTAG pins can be repurposed as general I/O.

Part Context

This part belongs to the ATF1504AS/L family of CPLDs, which utilizes Atmel's proven electrically-erasable memory technology. The family includes variants with different pin counts (44, 68, 84, 100) and speed grades (-7, -10, -15, -20, -25). The ATF1504AS series is designed for high-density applications requiring reprogrammability and robust performance in commercial and industrial environments.

Replacement Considerations

Direct replacements within the same family include other ATF1504AS speed grades (e.g., ATF1504AS-7JI68 for faster performance, ATF1504AS-15JI68 for cost optimization) provided they fit the same 68-lead PLCC package. Verify that any substitute maintains the 10 ns or better delay requirement if timing is critical.