ATF1500ABV-15AC

Overview

The ATF1500ABV-15AC is a high-performance, high-density complex programmable logic device (CPLD) manufactured by Microchip Technology. Built on advanced EEPROM technology, it features 32 logic macrocells and up to 36 inputs within a 44-pin package. The device supports a maximum pin-to-pin delay of 15 ns and registered operation speeds up to 52.6 MHz. It operates with a supply voltage range of 2.7 V to 5.5 V and is available in commercial temperature ranges (0°C to 70°C). Key architectural features include a fully connected global input and feedback logic array, flexible macrocell configurations, and pin-controlled power management.

Feature Summary

• EEPROM-based non-volatile memory with 10,000 program/erase cycles and 20-year data retention.
• Fully connected global bus architecture allowing any macrocell to connect to any I/O pin without pinout changes.
• Flexible macrocell supporting D/T/Latch configurable flip-flops and individual output slew rate control.
• Advanced power management including automatic standby mode and pin-controlled low-power shutdown.

Applications

• Integration of TTL, SSI, MSI, and classic PLD logic functions.
• High-speed sequential logic operations requiring registered feedback.
• Complex combinatorial logic generation using cascade and foldback logic chains.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm package type and temperature range. The 'A' suffix indicates a 44-lead TQFP package, while 'J' denotes a PLCC package. The 'C' suffix specifies the commercial operating temperature range. Ensure design files account for the security fuse programming sequence if copy protection is required.

Selection Notes

Select this component when a fully connected logic array is necessary to simplify placement and avoid routing constraints. The 15 ns speed grade is suitable for applications requiring moderate clock frequencies up to approximately 52.6 MHz. Consider the 2.7 V to 5.5 V operating range for compatibility with various logic families. Verify that the 32 macrocells provide sufficient resources for the target logic density.

Part Context

The ATF1500ABV belongs to the ATF1500A family of Electrically Erasable Programmable Logic Devices (EEPLDs). This family utilizes Flash or EEPROM technology to allow complete reprogrammability. The ATF1500ABV specifically distinguishes itself with a wider voltage range compared to some earlier variants and includes dedicated power-down capabilities. It serves as a drop-in replacement for many legacy PLD designs due to its backward compatibility with standard software tools.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. Designers should verify pin compatibility and electrical characteristics when considering alternative CPLDs from other manufacturers or different series within the same product line.

FAQ

What is the maximum operating frequency for registered operation?

The maximum operating frequency for registered operation is 52.6 MHz, determined by the setup time and clock-to-output delay specifications.

How does the device handle unused input pins?

The ATF1500ABV features programmable pin-keeper circuits that hold unused input and I/O pins at their previous logic state, preventing floating voltages and reducing power consumption without external pull-up resistors.

Can the power-down mode be used simultaneously with logic input functions?

No. When the pin-controlled power-down feature is enabled, the PD pin cannot be used as a logic input or output. However, the macrocell resources associated with the PD pin can still be used for internal logic generation.