AMD XC3S2000-4FG900I

Overview

XC3S2000-4FG900I from AMD (formerly Xilinx) is a Spartan-3 FPGA with 2,000,000 system gates, 173,000 logic cells, and 512 KB of block RAM. It features 633 user I/Os, operates at -4 speed grade (t_PD = 4.5 ns), and supports LVCMOS/LVTTL/SSTL/HSTL I/O standards. It is used in industrial control logic and high-speed data acquisition systems.

For engineers reviewing the XC3S2000-4FG900I datasheet, pinout, applications, or equivalent options, key selection factors include I/O count, speed grade timing closure, block RAM depth for buffering, and compatibility with Xilinx ISE 14.7 design flow.

Technical Context

The XC3S2000-4FG900I implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, and dedicated multipliers. It supports SelectIO technology for mixed-voltage I/O operation up to 3.3 V and includes Digital Clock Managers (DCMs) for clock synthesis and phase alignment.

Configuration is performed via Master Serial mode using external PROM or JTAG boundary-scan. The device requires separate V_CCINT (1.2 V), V_CCO (1.2–3.3 V), and V_REF supplies, with thermal management dependent on the 900-pin Fine-Pitch BGA (FPBGA) package.

Key Specifications

Pinout & Package

XC3S2000-4FG900I is housed in a 900-pin Fine-Pitch Ball Grid Array (FPBGA) package with 35 × 35 mm body size, 1.0 mm ball pitch, and thermal pad. Pinout follows Xilinx Spartan-3 FG900 mechanical and electrical specification.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3S2000-4FG900I, XC3S2500-4FG900I offers headroom for future feature expansion without PCB change, while XC3S1600E-4FG484C trades I/O count and clocking precision for lower BOM cost and smaller board area.

Availability

XC3S2000-4FG900I is available at Aetrix Electronics and suitable for industrial motion control, high-speed data acquisition, and protocol bridging gateway applications requiring stable component supply and long-term obsolescence management.

Supply support for XC3S2000-4FG900I 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 continues development and support of the Spartan, Virtex, and Artix FPGA families. Xilinx pioneered programmable logic architecture and EDA tool integration.

The Spartan-3 family, including XC3S2000-4FG900I, was designed for cost-sensitive, high-volume applications requiring balanced logic density, I/O flexibility, and deterministic timing - especially in industrial and test equipment.

FAQ

What is the maximum operating frequency supported by XC3S2000-4FG900I?

The XC3S2000-4FG900I has a -4 speed grade, guaranteeing CLB-to-CLB path delays ≤4.5 ns under worst-case conditions (1.2 V, 85°C). Synthesis results in Xilinx ISE 14.7 typically achieve 200–250 MHz system clock frequencies for well-constrained synchronous designs. Actual performance depends on placement, routing, and logic depth.

Does XC3S2000-4FG900I support JTAG programming and debugging?

Yes, XC3S2000-4FG900I fully supports IEEE 1149.1 JTAG boundary-scan. Pins TCK, TMS, TDI, TDO, and TRST enable in-system programming, configuration verification, and real-time debug access via Xilinx iMPACT or ChipScope Pro tools. JTAG is active before and after configuration.

What power supply voltages does XC3S2000-4FG900I require?

XC3S2000-4FG900I requires three distinct supply domains: V_CCINT = 1.2 V ±3% for core logic, V_CCO = 1.2–3.3 V (per I/O bank) for output drivers, and optional V_REF for differential standards. Decoupling must follow Xilinx UG331 guidelines, with separate planes and localized ceramic capacitors per supply rail.

Can XC3S2000-4FG900I replace XC3S1500-4FG900I in an existing design?

Yes, XC3S2000-4FG900I is pin-compatible and functionally upward-compatible with XC3S1500-4FG900I. Both use identical 900-pin FPBGA packaging, same power and configuration pin assignments, and share compatible bitstream formats. Resource increase (2M → 2.5M gates) adds margin without requiring layout changes.

Is XC3S2000-4FG900I still in production or subject to obsolescence?

XC3S2000-4FG900I is listed as Not Recommended for New Designs (NRND) by AMD/Xilinx but remains actively supported through authorized distributors with verified inventory. Aetrix Electronics maintains traceable stock and offers lifecycle coordination, including last-time-buy planning and migration path guidance to Spartan-7 or Artix-7 alternatives.