AMD XC3S1000-5FG676C

Overview

XC3S1000-5FG676C from AMD (formerly Xilinx) is a Spartan-3 FPGA with 1,000,000 system gates, 17,280 logic cells, and 128 embedded 18×18 multipliers. It features 448 I/O pins, operates at -5 speed grade (t_PD = 4.5 ns), and uses a 676-pin Fine-Pitch Ball Grid Array (FBGA) package. It is deployed in industrial motor control interface modules requiring deterministic timing and parallel I/O expansion.

For engineers reviewing the XC3S1000-5FG676C datasheet, pinout, applications, or equivalent options, key selection considerations include I/O count, multiplier density, speed grade timing margins, and FBGA676 thermal/mechanical compatibility with existing PCB land patterns.

Technical Context

The XC3S1000-5FG676C implements a configurable logic block (CLB) architecture with four 3-input LUTs and eight flip-flops per CLB, supporting synchronous logic and registered I/O. It integrates SelectIO technology for single-ended (LVTTL, LVCMOS) and differential (LVDS, RSDS) signaling across all 448 user I/Os.

Configuration is performed via Master Serial mode using an external PROM or through JTAG boundary-scan. The device supports partial reconfiguration and includes dedicated digital clock managers (DCMs) with phase-matching, frequency synthesis, and duty-cycle correction capabilities.

Key Specifications

Pinout & Package

XC3S1000-5FG676C is housed in a 676-ball fine-pitch FBGA package (package code FG676) with 27×27 array, 1.0 mm ball pitch, and thermal pad exposed on underside. Pin functions are assigned per Xilinx DS099 v2.5, with dedicated configuration (INIT_B, PROGRAM_B, CCLK, DIN), JTAG (TCK/TMS/TDI/TDO), and dual-purpose I/O banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3S1000-5FG676C, XC3S1500-5FG676C offers direct pin-compatible scalability within Spartan-3, while XC6SLX150-3FG676C provides architectural advancement with greater logic density and memory bandwidth at the cost of toolchain and constraint migration effort.

Availability

XC3S1000-5FG676C is available at Aetrix Electronics and suitable for industrial motion control, medical imaging acquisition, video interface bridging, and PLC I/O expansion requiring stable component supply and long-term lifecycle support.

Supply support for XC3S1000-5FG676C 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 develops adaptive computing platforms including FPGAs, adaptive SoCs, and AI accelerators for data center, embedded, and edge applications.

The Spartan-3 family, including XC3S1000-5FG676C, was designed for cost-sensitive, high-volume embedded applications requiring balanced logic density, I/O flexibility, and deterministic timing - especially in industrial automation and video processing.

FAQ

What is the maximum operating frequency of the XC3S1000-5FG676C?

The XC3S1000-5FG676C has a -5 speed grade specifying a maximum I/O-to-output path delay of 4.5 ns. Its internal logic performance supports system clock frequencies up to 280 MHz for typical register-to-register paths, depending on design placement and routing. The actual achievable frequency for a given XC3S1000-5FG676C implementation is determined by static timing analysis using Xilinx ISE 14.7 tools and constrained by critical path delays in the user's HDL design.

Does the XC3S1000-5FG676C support JTAG programming and debugging?

Yes, the XC3S1000-5FG676C fully supports IEEE 1149.1 JTAG boundary-scan for programming, configuration verification, and in-circuit debugging. Pins TCK, TMS, TDI, and TDO are dedicated for this purpose and remain functional even after configuration. JTAG mode allows bitstream loading, SRAM content readback, and device ID interrogation without requiring external configuration PROMs - essential for prototype validation and field firmware updates of the XC3S1000-5FG676C.

What voltage levels does the XC3S1000-5FG676C support for its I/O banks?

The XC3S1000-5FG676C supports multiple I/O standards per bank, including LVCMOS 3.3 V, 2.5 V, and 1.8 V; LVTTL; and differential standards such as LVDS and RSDS. Each of the 16 I/O banks has independent VCCO supply pins, allowing mixed-voltage operation across banks. This capability enables direct interfacing with diverse peripherals - for example, connecting 3.3 V sensors, 1.8 V memory, and LVDS displays - without external level shifters in the XC3S1000-5FG676C design.

Is the XC3S1000-5FG676C still in active production?

The XC3S1000-5FG676C is in mature product status and no longer in active wafer fabrication at AMD/Xilinx. However, Aetrix Electronics maintains verified inventory and authorized distribution channels for this part, with full traceability and extended lifecycle support. Customers using XC3S1000-5FG676C in legacy systems can rely on Aetrix's continuity program to secure long-term supply without redesign, subject to remaining stock and replenishment feasibility.

Can the XC3S1000-5FG676C be configured using a microcontroller?

Yes, the XC3S1000-5FG676C supports Slave Serial and Slave SelectMAP configuration modes, enabling direct bitstream loading from an external microcontroller via SPI or parallel bus. In Slave Serial mode, the microcontroller drives CCLK and shifts data into DIN; in SelectMAP mode, it writes 8-bit words to the configuration port. This capability allows field-upgradable logic and dynamic reconfiguration without dedicated PROMs - a key feature for adaptive control systems built around the XC3S1000-5FG676C.