ATF1500A-10JU

Overview

The ATF1500A-10JU is a high-performance, electrically erasable complex programmable logic device (CPLD) manufactured by Microchip Technology. It features 32 macrocells and supports up to 36 inputs with a maximum pin-to-pin delay of 10 ns. The device operates at frequencies up to 76.9 MHz externally and 100 MHz internally. It utilizes advanced Flash technology for complete reprogrammability and includes flexible logic macrocells with D/T/Latch configurable flip-flops. The component is housed in a 44-lead Plastic J-leaded Chip Carrier (PLCC) package and is rated for industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Advanced Flash Technology: 100% tested, completely reprogrammable with 100 program/erase cycles and 20-year data retention.
• Flexible Logic Macrocell: Supports D/T/Latch configurable flip-flops, global and individual register control signals, and programmable output slew rate.
• Power Management: Features automatic standby mode and pin-controlled power-down mode reducing current to below 10 mA.
• Global Architecture: Fully connected input and feedback logic array with global and regional buses simplifies logic placement.

Applications

• Replacing TTL, SSI, MSI, and classic PLDs in digital logic designs.
• State machine initialization and control applications requiring registered operation.
• Systems needing low-power standby modes and pin-controlled power-down capabilities.

Procurement Notes

Verify the specific ordering suffix 'JU' corresponds to the 44-lead PLCC package and Industrial temperature range (-40°C to +85°C). Confirm that the design software supports backward compatibility with ATF1500/L if migrating from older devices. Check for any end-of-life notifications or recommended replacement parts such as the ATF1502AS for fast-speed grades.

Selection Notes

Select the ATF1500A-10JU when a 44-pin CPLD with 32 macrocells and 10 ns speed grade is required for industrial environments. Ensure the design fits within the 32 macrocell limit and utilizes the global bus architecture effectively. Consider the ATF1500AL variant if lower standby current (3 mA) is critical, noting it may have different availability or pricing structures.

Part Context

The ATF1500A series belongs to the high-density, high-performance EEPLD family. It offers backward compatibility with ATF1500/L software and hardware. The device integrates logic from various legacy technologies into a single reprogrammable component, simplifying system design and reducing board space requirements.

Replacement Considerations

For fast-speed grades, the ATF1502AS is a pin-compatible replacement. For other speed grades, suggested replacements are available in Green packages. Verify specific pin compatibility and electrical characteristics before substitution.

FAQ

What is the maximum operating frequency for the ATF1500A-10JU?

The maximum external feedback frequency is 76.9 MHz, while the internal feedback frequency can reach 100 MHz.

How does the power-down mode function?

When the PD pin is driven high, the device enters a power-down mode where supply current drops below 10 mA. All internal logic states and outputs are latched and held, and input transitions are ignored until the PD pin is brought low.

What is the purpose of the pin-keeper circuit?

The programmable pin-keeper circuit prevents unused Input and I/O pins from floating to intermediate voltage levels, which reduces unnecessary power consumption and system noise, eliminating the need for external pull-up resistors.