ATF1502AS-15AC44

Overview

The ATF1502AS-15AC44 is a high-performance, electrically erasable Complex Programmable Logic Device (CPLD) from Microchip Technology. It features 32 logic macrocells with up to 36 inputs and 32 bi-directional I/O pins in a 44-pin package. The device supports In-System Programmability (ISP) via JTAG and offers enhanced routing resources for efficient design implementation. Key electrical parameters include a maximum pin-to-pin delay of 7.5 ns, registered operation up to 125 MHz, and a 5V operating voltage range. It utilizes advanced EEPROM technology for complete reprogrammability.

Feature Summary

• 32 Macrocells with 5 Product Terms each, expandable to 40 via cascade logic
• In-System Programmability (ISP) via standard 4-pin JTAG interface
• Flexible Logic Macrocell supporting D/T Latch configurable Flip-flops
• Advanced Power Management including automatic standby and pin-controlled power-down modes

Applications

• Integration of TTL, SSI, MSI, LSI, and classic PLD logic functions
• PCI-compliant interface designs requiring high current drivers
• State machine initialization using power-up reset features
• Boundary-scan testing and system debugging via IEEE Std. 1149.1

Procurement Notes

Verify the specific suffix 'AC44' corresponds to the commercial temperature range (0°C to +70°C) and TQFP-44 package as indicated by the model designation. Confirm that the 'AS' variant denotes standard power consumption rather than the low-power 'ASL' version. Ensure design files account for the 5V supply voltage requirements and JTAG pin allocation if ISP is utilized.

Selection Notes

Select this component when 32 macrocells are sufficient for the target logic density. The -15 speed grade indicates a maximum propagation delay of 7.5 ns, suitable for applications requiring registered operation up to 125 MHz. Consider the enhanced routing switch matrices if pin-locked design modifications are anticipated. Verify compatibility with third-party fitters and compilers supporting the ATF1502AS architecture.

Part Context

This part belongs to the ATF1502AS family of high-density CPLDs. It shares architectural similarities with the ATF1502ASL but differs in power characteristics. The device is designed to replace legacy discrete logic and simple PLDs, offering higher integration and lower power consumption through its EEPROM technology and programmable features.

Replacement Considerations

Direct functional replacements within the same family include the ATF1502ASL series for low-power variants or other ATF1502AS speed grades (-7, -10, -25) depending on timing requirements. Cross-family replacements may require logic restructuring due to differences in macrocell count and routing resources.