AMD XC2C256-7TQG144C

Overview

XC2C256-7TQG144C from AMD (formerly Xilinx) is a CoolRunner-II CPLD featuring 256 macrocells, 144-pin TQFP package, 7.5 ns pin-to-pin delay, and in-system programmability via JTAG. It serves as a glue-logic replacement in legacy industrial control and telecom interface boards.

For engineers reviewing the XC2C256-7TQG144C datasheet, pinout, applications, or equivalent options, key selection factors include propagation delay budget, I/O voltage compatibility (3.3 V), macrocell count for logic density, and JTAG-based field reprogrammability.

Technical Context

The XC2C256-7TQG144C implements a sum-of-products (SOP) architecture with function blocks containing macrocells, product-term distributors, and configurable interconnect. Each macrocell supports registered or combinational output with independent clock, reset, set, and output enable controls.

It operates at 3.3 V supply, supports mixed I/O standards (LVTTL, LVCMOS), and includes advanced features such as DataGATE power management to reduce dynamic power by disabling unused logic paths during idle cycles.

Key Specifications

Pinout & Package

TQFP-144 package with 0.5 mm lead pitch, 20 mm × 20 mm body, and exposed thermal pad (non-electrical). Pin 1 marked by corner cut or dot; pins numbered counter-clockwise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPLD-based glue logic applications.

Compared with XC2C256-7TQG144C, the XCR3256XL-10TQ144C trades simpler power delivery for higher timing margin, while the XC2C384-7TQ144C retains identical board integration but doubles logic capacity-both require validation of JTAG chain compatibility and I/O voltage mapping.

Availability

XC2C256-7TQG144C is available at Aetrix Electronics and suitable for industrial control, telecom infrastructure, and automotive body electronics requiring stable component supply and long-term obsolescence mitigation.

Supply support for XC2C256-7TQG144C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

AMD acquired Xilinx in 2022 and now manages the legacy CoolRunner-II CPLD portfolio. AMD is a global semiconductor leader focused on adaptive computing, AI acceleration, and high-performance processing.

The CoolRunner-II family was designed for low-power, high-reliability glue logic replacement in mission-critical industrial and telecom systems where long-lifecycle support and deterministic timing are essential.

FAQ

What is the maximum operating frequency supported by the XC2C256-7TQG144C?

The XC2C256-7TQG144C supports a maximum system clock frequency of 133 MHz, derived from its 7.5 ns pin-to-pin propagation delay specification. This timing allows reliable use in synchronous designs with setup/hold margins meeting industrial temperature range requirements. The actual achievable frequency depends on logic depth and routing; XC2C256-7TQG144C timing reports confirm this limit under worst-case conditions.

Does the XC2C256-7TQG144C support in-system programming after soldering to the PCB?

Yes, the XC2C256-7TQG144C supports full in-system programming via its IEEE 1149.1 JTAG interface. No socket or external programmer is needed-designs can be programmed and reprogrammed directly on the assembled board using standard JTAG adapters. XC2C256-7TQG144C configuration memory is non-volatile, retaining logic after power cycle.

Can the XC2C256-7TQG144C operate with 2.5 V I/O signaling?

No, the XC2C256-7TQG144C is specified only for 3.3 V I/O operation (VCCIO = 3.3 V ±10%). It does not support 2.5 V or 1.8 V I/O standards. Attempting 2.5 V signaling may violate input threshold specifications and cause unreliable operation. XC2C256-7TQG144C requires strict adherence to 3.3 V I/O voltage levels.

What is the purpose of the DataGATE feature in the XC2C256-7TQG144C?

DataGATE dynamically disables clock distribution to unused macrocells and function blocks, reducing switching activity and lowering dynamic power consumption by up to 80%. This feature is enabled automatically during synthesis and requires no runtime control. XC2C256-7TQG144C leverages DataGATE to meet stringent power budgets in fanless industrial enclosures.

Is the XC2C256-7TQG144C pin-compatible with other CoolRunner-II devices in TQFP-144 package?

XC2C256-7TQG144C shares the same TQFP-144 mechanical footprint and power/ground pinout with other CoolRunner-II devices in that package, but I/O pin assignments and function block mapping differ across densities and speed grades. Direct substitution requires logic recompilation and timing verification. XC2C256-7TQG144C is not guaranteed pin-compatible with XC2C384-7TQ144C or XCR3256XL-10TQ144C without design review.