XCR3256XL-12PQG208C

Complex Programmable Logic Devices Overview

The XCR3256XL-12PQG208C is a Complex Programmable Logic Device (CPLD) belonging to the CoolRunner XPLA3 family, manufactured by AMD. It features 256 macrocells and supports up to 164 I/O lines within a 208-pin PQFP package. The device operates with a maximum clock frequency of 88 MHz and exhibits a typical propagation delay of 12 ns. It functions as an Electrically Erasable PLD, allowing for system-in-programmability capabilities.

Complex Programmable Logic Devices Feature Summary

• Contains 256 macrocells and approximately 6000 usable gates for logic implementation.
• Supports System-In-Programmability (SIP) with over 1,000 program/erase cycles.
• Includes JTAG boundary scan support for testing and configuration.
• Operates on a single 3V to 3.6V power supply.

Complex Programmable Logic Devices Applications

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

Complex Programmable Logic Devices Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status, as specific suffixes may indicate lead-free or restricted material variants. Check for End-of-Life (EOL) notices or Product Change Notifications (PCN) from AMD/Xilinx regarding manufacturing availability and long-term supply commitments.

Complex Programmable Logic Devices Selection Notes

Select this model when 256 macrocells are sufficient for the design complexity. Ensure the 208-pin PQFP footprint fits the PCB layout constraints. Verify that the 12 ns speed grade meets the timing requirements of the target application. Consider thermal dissipation characteristics associated with the plastic QFP package during operation.

Complex Programmable Logic Devices Part Context

This component is part of the CoolRunner XPLA3 series, designed to replace complex discrete logic gates. It utilizes EEPROM technology for non-volatile configuration retention without requiring external memory devices. The series targets cost-sensitive applications requiring moderate logic density and high reliability.

Complex Programmable Logic Devices Replacement Considerations

Direct pin-to-pin replacements may be limited due to package variations. Potential alternatives include other CPLDs with similar macrocell counts, such as Lattice MachXO or Efinix Trion series, though interface and voltage differences must be evaluated. Consult AMD documentation for officially recommended cross-reference parts.