ATF1502AS-7JX44

Overview

The ATF1502AS-7JX44 is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology. It features 32 macrocells with up to 40 product terms per macrocell and operates at a maximum pin-to-pin delay of 7.5 ns. The device supports registered operation up to 125 MHz and utilizes In-System Programmability (ISP) via JTAG. It is housed in a 44-lead PLCC package and functions within a commercial temperature range of 0°C to +70°C using a 5V power supply.

Feature Summary

• Contains 32 logic macrocells with enhanced routing resources and up to 40 expandable product terms per macrocell.
• Supports In-System Programmability (ISP) through the standard 4-pin JTAG interface compliant with IEEE Std. 1149.1.
• Features advanced power management including automatic standby modes and pin-controlled power-down capabilities.
• Includes programmable pin-keeper inputs to prevent floating pins and reduce system noise.

Applications

• High-speed digital logic integration replacing TTL, SSI, MSI, or classic PLDs.
• PCI-compliant interface designs requiring high current drivers and low output skew.
• Complex state machine implementations utilizing global clock and reset signals.

Procurement Notes

Verify the specific suffix 'JX44' against official Microchip documentation to confirm the exact package type and temperature grade. Ensure design files account for the 5V operating voltage requirements and JTAG pin reservations if ISP functionality is utilized during deployment.

Selection Notes

Select this component when 32 macrocells are sufficient for the target logic density. The -7 speed grade provides a 7.5 ns maximum delay suitable for applications requiring internal clock frequencies up to 125 MHz. Consider the PLCC-44 package constraints for PCB layout and thermal management.

Part Context

This part belongs to the ATF1502AS(L) series of CPLDs. The 'AS' designation indicates the standard 5V version, while the '-7' suffix denotes the 7.5 ns speed grade. The 'X44' typically identifies the 44-lead PLCC package variant within the product line.

Replacement Considerations

Direct replacements include other ATF1502AS variants with different speed grades (e.g., -10, -25) or packages (TQFP). Cross-family migration may require logic restructuring due to differences in macrocell architecture and I/O counts.

FAQ

What is the maximum internal clock frequency for the ATF1502AS-7?

The maximum internal global clock frequency is 125 MHz for the -7 speed grade.

How many product terms are available per macrocell?

Each macrocell has five base product terms, which can be expanded to up to 40 product terms using cascade logic from neighboring macrocells.

Is the device compatible with PCI standards?

Yes, the ATF1502AS(L) is PCI-compliant, supporting high current drivers and low output-to-output skew required by the PCI interface standard.