ATF1502AS-10AU44

Overview

The ATF1502AS-10AU44 is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) manufactured by Microchip Technology. It features 32 macrocells with up to 36 inputs and 32 bi-directional I/O pins in a 44-pin TQFP package. The device operates on a 5V supply voltage (4.75V to 5.25V) and supports In-System Programmability (ISP) via JTAG. Key electrical parameters include a maximum pin-to-pin delay of 10 ns and a registered operation frequency up to 125 MHz. It utilizes advanced EEPROM technology offering 10,000 program/erase cycles and 20-year data retention.

Feature Summary

• 32 Macrocells with 5 product terms each, expandable to 40 via cascade logic
• In-System Programmability (ISP) using standard 4-pin JTAG interface
• Flexible macrocell architecture supporting D/T latch configurable flip-flops and global control signals
• PCI-compliant output drivers with programmable slew rate and open collector options

Applications

• High-speed digital logic integration replacing TTL, SSI, MSI, or classic PLDs
• PCI bus interface designs requiring high current drive capabilities
• Complex state machine implementations with power-up reset initialization
• Field programmable logic modifications via ISP without board removal

Procurement Notes

Verify the specific speed grade suffix '-10' corresponds to the 10 ns maximum delay requirement for your design timing constraints. Confirm that the 44-TQFP package matches your PCB footprint specifications. Ensure the design toolchain supports the Atmel/Microchip ATF15xx series programming formats. Check for any recent Product Change Notifications (PCN) regarding marking or packaging updates from the manufacturer.

Selection Notes

Select this component when a 5V supply is required, as opposed to the 3.3V ATF1502ASL variant. Choose the -10 speed grade if the system clock exceeds 100 MHz; otherwise, slower grades may offer lower power consumption. Consider the -7 grade if tighter timing margins are needed for critical paths. Verify that the available I/O count (32 I/O + 4 dedicated inputs) meets the pinout requirements of the target application.

Part Context

This part belongs to the ATF15xx family of high-density CPLDs. It shares architectural similarities with the ATF1504 and ATF1508 models but offers fewer macrocells (32 vs 64 or 128). The 'A' denotes the commercial temperature range (-40°C to +85°C), while 'S' indicates the use of advanced EEPROM technology. The 'U44' suffix specifies the 44-lead Thin Quad Flat Package (TQFP) with a 10x10 mm body size.

Replacement Considerations

Direct functional replacements within the same package include other speed grades of the ATF1502AS series, such as ATF1502AS-7AU44 (7 ns) or ATF1502AS-25AU44 (25 ns), provided timing constraints allow. For lower power applications requiring 3.3V operation, the ATF1502ASL-10AU44 is an alternative, though supply voltage differences must be addressed.