XCR3256XL-12TQ144C

Overview

The XCR3256XL-12TQ144C is a Complex Programmable Logic Device (CPLD) from the CoolRunner XPLA3 series, manufactured by AMD. It features 256 macrocells and 6000 system gates within a TQFP-144 package. The device operates on a supply voltage of 3 V to 3.6 V and supports up to 120 I/O pins. Key electrical parameters include a maximum propagation delay of 7 ns and a maximum operating frequency of 154 MHz. It utilizes EEPROM storage technology for non-volatile configuration and functions within an ambient temperature range of 0°C to +70°C.

Feature Summary

• Contains 256 macrocells and 6000 system gates with 2 Logic Array Blocks (LABs).
• Supports System In-Programmability (SIPI) with over 1,000 program/erase cycles.
• Operates at a maximum frequency of 154 MHz with a typical propagation delay of 7 ns.
• housed in a 144-pin Thin Quad Flat Package (TQFP) suitable for surface mount applications.

Applications

• General-purpose logic replacement in industrial control systems.
• Address decoding and bus buffering in embedded hardware designs.
• Interface bridging between microprocessors and peripheral devices.

Procurement Notes

This component is officially listed as obsolete and no longer manufactured by AMD. Availability is restricted to existing stock or third-party distributors. Verification of authenticity and lot traceability is critical when sourcing from secondary markets due to the end-of-life status. Ensure compliance with RoHS requirements if applicable to the specific revision, as some sources indicate non-compliance for certain batches.

Selection Notes

Designers requiring new production should consider alternative CPLDs from the same family or newer generations, such as the XC2C series, which offer similar functionality with current manufacturing support. Verify that the target application does not require higher pin counts or faster switching speeds than the 154 MHz limit provided by this model.

Part Context

The XCR3256XL-12TQ144C belongs to the CoolRunner XPLA3 family, designed for low-power, high-density programmable logic applications. This series bridges the gap between complex FPGAs and simpler GALs, offering reprogrammability with EEPROM-based non-volatility. The '12' suffix denotes the speed grade, while 'TQ144' specifies the 144-pin TQFP package type.

Replacement Considerations

Publicly confirmed substitute part numbers include XC2C256-7FTG256C. Other potential alternatives found in distributor listings include LC4256V-75FTN256BC from Lattice Semiconductor, though pinout and feature compatibility must be verified against original schematics.