XCR3256XL-7TQ144C

Overview

The XCR3256XL-7TQ144C is a Complex Programmable Logic Device (CPLD) from the AMD/Xilinx XCR3000XL family. It features 256 macrocells and supports up to 120 I/O pins within a TQFP-144 surface-mount package. The device operates on a single 3.3V supply with a maximum operating frequency of 154 MHz and a typical propagation delay of 7 ns. It utilizes non-volatile EEPROM technology for configuration storage, ensuring data retention without power. The component is designed for industrial temperature ranges and offers high-density logic in a compact form factor suitable for embedded control applications.

Feature Summary

• 256 Macrocells with 6000 system gates
• 120 General Purpose I/O pins
• Non-volatile EEPROM configuration memory
• Single 3.3V power supply operation

Applications

• High-density logic replacement for legacy TTL/CMOS circuits
• Address decoding and bus bridging in embedded systems
• Power-on reset generation and supervisor circuits
• Clock buffering and distribution networks

Procurement Notes

Verify availability status as this specific part number may be discontinued or subject to limited stock constraints. Confirm that the TQFP-144 package matches the PCB footprint requirements. Ensure the voltage level compatibility aligns with the target 3.3V system design. Check for moisture sensitivity labeling if long-term storage is planned before assembly.

Selection Notes

Select this model when 256 macrocells are sufficient for the logic density requirements. The 7-speed grade (7 ns delay) provides adequate performance for most synchronous designs up to 154 MHz. Consider the TQFP-144 package only if board space allows for its larger footprint compared to smaller pin-count CPLDs. Verify that the 3.3V I/O levels match the connected peripherals.

Part Context

This component belongs to the XCR3000XL series, which represents an enhanced version of the original XCR3000 CPLD line. The XL series offers improved performance and lower power consumption while maintaining pin-to-pin compatibility with earlier generations. It serves as a bridge between low-density PLDs and higher-end FPGAs, providing a cost-effective solution for moderate logic complexity.

Replacement Considerations

Direct pin-compatible replacements include other speed grades within the XCR3256XL family, such as the XCR3256XL-10TQ144C or XCR3256XL-12TQ144C. These variants offer different timing characteristics but maintain identical functionality and package dimensions. Cross-referencing with older XCR3256 models may require verification of electrical parameter differences.