AMD XCS20-4TQ144C

Overview

XCS20-4TQ144C from AMD (formerly Xilinx) is a Spartan-2 family FPGA with 20,000 system gates, 144-pin TQFP package, -4 speed grade, and commercial temperature range (0°C to 70°C). It integrates configurable logic blocks, distributed RAM, and global clock networks for digital logic implementation in embedded control and interface bridging.

For engineers reviewing the XCS20-4TQ144C datasheet, pinout, applications, or equivalent options, key selection criteria include I/O count (118 user I/Os), configuration mode (serial PROM or JTAG), and logic resource density (1,152 CLBs) for cost-sensitive reconfigurable logic tasks.

Technical Context

The XCS20-4TQ144C implements a fine-grained architecture with 1,152 configurable logic blocks (CLBs), each containing two 4-input LUTs and flip-flops. It supports multiple configuration modes including Master Serial, Slave Serial, and JTAG Boundary Scan.

It features 118 user I/O pins with programmable slew rate and drive strength, and includes global clock buffers with low skew. The device uses 0.22 µm CMOS process technology and operates at 3.3 V core and I/O voltage.

Key Specifications

Pinout & Package

Package: 144-pin Thin Quad Flat Pack (TQFP), 20 mm × 20 mm, 0.5 mm pitch, lead-free compatible.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based logic implementation applications.

Compared with XCS20-4TQ144C, the XCS20-5TQ144C offers higher timing performance without layout changes, while the XCS30-4TQ144C delivers 50% more logic capacity in the same footprint-enabling feature expansion without board revision.

Availability

XCS20-4TQ144C is available at Aetrix Electronics and suitable for industrial automation, test equipment, and medical device control applications requiring stable component supply across long-lifecycle programs.

Supply support for XCS20-4TQ144C 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 is a global semiconductor leader delivering adaptive computing, graphics, and AI solutions. Formerly Xilinx, it pioneered FPGA technology for reconfigurable digital logic.

The Spartan-2 family-including XCS20-4TQ144C-was designed for cost-sensitive, high-volume applications requiring reliable, non-volatile logic implementation with fast time-to-market.

FAQ

What is the configuration method supported by XCS20-4TQ144C?

XCS20-4TQ144C supports Master Serial, Slave Serial, and JTAG configuration modes. It boots from external serial PROM by default but can be programmed in-system via JTAG using standard tools like Xilinx IMPACT. The M0–M3 pins select the active mode, and no external microcontroller is required for basic configuration.

Does XCS20-4TQ144C require external configuration memory?

Yes, XCS20-4TQ144C is SRAM-based and requires external non-volatile memory (e.g., Xilinx XC18V02 serial PROM) for automatic configuration on power-up. Unlike flash-based FPGAs, it loads its bitstream at each power cycle, making the PROM an essential part of the system design for XCS20-4TQ144C.

What I/O standards does XCS20-4TQ144C support?

XCS20-4TQ144C supports LVTTL and LVCMOS I/O standards at 3.3 V. Each I/O bank is configurable for input threshold, drive strength, and slew rate. It does not support 2.5 V or 1.8 V I/O standards, and all I/Os share the same VCCO supply voltage.

Is XCS20-4TQ144C pin-compatible with other Spartan-2 devices in TQFP-144?

Yes, XCS20-4TQ144C is pin-compatible with other Spartan-2 devices in the 144-pin TQFP package, including XCS30-4TQ144C and XCS20-5TQ144C. Signal assignments, power, and ground pin locations are identical-allowing direct substitution where logic capacity or speed grade permits.

What is the maximum operating frequency of XCS20-4TQ144C?

The maximum internal clock frequency for XCS20-4TQ144C is 125 MHz, as guaranteed by its -4 speed grade. This applies to logic paths between CLBs; actual system frequency depends on routing delay, I/O timing, and clock network loading. External I/Os are rated for up to 100 MHz data rates under specified conditions.