ATF1502AS-15JI44

Overview

The ATF1502AS-15JI44 is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) from Microchip Technology. It features 32 macrocells with up to 36 inputs and 32 bi-directional I/O pins in a 44-pin PLCC package. The device operates on a 5V supply and supports In-System Programmability (ISP) via JTAG. Key electrical parameters include a maximum pin-to-pin delay of 15 ns, registered operation up to 76.9 MHz, and a maximum logic utilization frequency of 100 MHz. It includes advanced power management features such as automatic standby and pin-controlled power-down modes.

Feature Summary

• 32 Macrocells with 5 Product Terms per Macrocell, expandable up to 40 terms via cascade logic
• In-System Programmability (ISP) using standard 4-pin JTAG interface (IEEE Std. 1149.1)
• Advanced Power Management including automatic 10µA standby mode and pin-controlled power-down (<5 mA)
• PCI-compliant output drivers with programmable slew rate control

Applications

• Logic replacement for TTL, SSI, MSI, LSI, and classic PLDs
• PCI-based interface designs requiring high current drivers
• State machine initialization and control logic
• Boundary-scan testing and system debugging

Procurement Notes

Verify the specific suffix 'JI44' against the manufacturer's official ordering guide to confirm package type (PLCC-44), temperature range (Commercial 0°C to 70°C), and speed grade (-15). Ensure design files account for the 5V operating voltage and JTAG pin allocation if ISP is required.

Selection Notes

Select this component when 32 macrocells are sufficient for the design logic density. The -15 speed grade provides a 15 ns max delay suitable for applications under 100 MHz. Consider the ATF1502ASL variant if lower power consumption is critical, as it offers reduced standby current. Verify that the 44-pin PLCC package fits the PCB footprint constraints.

Part Context

This part belongs to the ATF15xx series of high-density CPLDs utilizing EEPROM technology. It is designed to integrate logic functions from various legacy programmable devices into a single reprogrammable chip. The series supports flexible macrocell configurations and enhanced routing resources to improve design success rates.

Replacement Considerations

Direct functional replacements within the same family include ATF1502AS-10JI44 (faster speed) or ATF1502AS-25JI44 (slower speed). For lower power requirements, the ATF1502ASL-15JI44 is an alternative. Cross-family replacements require logic density and I/O count verification.