ATF1504AS-15AC44

Overview

The ATF1504AS-15AC44 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 15 ns and supports registered operation up to 100 MHz. It accommodates 32 I/O pins within a 44-lead TQFP package. Power supply requirements include VCCINT or VCCIO at 5V ±5% for commercial applications, or 3.0V–3.6V for 3.3V I/O configurations.

Feature Summary

• 64 Macrocells with flexible D/T/Latch configurable flip-flops
• In-System Programmability (ISP) via IEEE Std. 1149.1 JTAG interface
• Maximum 15 ns pin-to-pin propagation delay
• Supports 3.3V or 5.0V I/O pins

Applications

• PCI-compliant interface designs
• State machine initialization and control
• Logic integration replacing TTL/SSI/MSI components

Procurement Notes

Verify the specific suffix 'AC44' against official Microchip documentation to confirm the 44-lead TQFP package and commercial temperature range specifications. Ensure design files account for the 15 ns timing constraints and power supply voltage tolerances defined in the datasheet.

Selection Notes

Select this component when 64 macrocells are sufficient for the logic density requirements. The -15 speed grade offers a balance between performance and power consumption compared to faster grades. Verify that the target system supports the required 3.3V or 5V I/O levels and utilizes the JTAG interface for programming.

Part Context

This part belongs to the ATF1504AS(L) family of high-density CPLDs. The 'AS' designation indicates standard power consumption, while the 'L' variant offers automatic standby modes. The 'A' suffix typically denotes the commercial temperature range (0°C to 70°C), distinguishing it from industrial variants.

Replacement Considerations

Direct replacements within the same package and speed grade should be sought from the ATF1504AS series. Cross-model substitution requires verification of pin compatibility and logic resource equivalence.