AMD XC3S1000-4FGG320I

Overview

XC3S1000-4FGG320I from AMD (formerly Xilinx) is a Spartan-3 FPGA with 1,000,000 system gates, 17,280 logic cells, and 512 KB of total block RAM. It features a 320-pin Fine-Pitch Ball Grid Array (FBGA) package, operates at -4 speed grade (tPD = 4.5 ns), and supports 3.3V/2.5V I/O with SelectIO technology. It is used in industrial control logic and reconfigurable digital signal processing subsystems.

For engineers reviewing the XC3S1000-4FGG320I datasheet, pinout, applications, or equivalent options, key selection factors include logic capacity, I/O voltage flexibility, embedded RAM depth, timing closure margin at -4 speed grade, and FBGA320 thermal and routing constraints.

Technical Context

The XC3S1000-4FGG320I implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, and dedicated 18×18 multipliers. It uses SRAM-based configuration memory loaded via JTAG or master serial mode, supporting partial reconfiguration in select designs.

It integrates Digital Clock Managers (DCMs) for clock synthesis, phase shifting, and duty cycle correction across up to eight independent clock domains. I/O banks support LVCMOS, LVTTL, PCI, and SSTL standards with programmable slew rate and drive strength per pin group.

Key Specifications

Pinout & Package

XC3S1000-4FGG320I is housed in a 320-pin Fine-Pitch Ball Grid Array (FBGA) package with 20×20 array, 0.8 mm pitch, and 15 mm × 15 mm body size. Thermal pad on underside requires PCB thermal via array for reliable operation above 65°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3S1000-4FGG456C and XC3S1500-4FGG456C, the XC3S1000-4FGG320I offers optimal balance of I/O count, logic density, and thermal footprint for space-constrained industrial controllers where 224 pins and 1M gates meet functional requirements without overdesign.

Availability

XC3S1000-4FGG320I is available at Aetrix Electronics and suitable for industrial motion control, protocol bridging, and video preprocessing applications requiring stable component supply and long-term obsolescence planning.

Supply support for XC3S1000-4FGG320I 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 maintains the Spartan-3 product family for legacy industrial and aerospace programs. The company specializes in adaptive computing platforms spanning FPGAs, MPSoCs, and AI accelerators.

The Spartan-3 family was designed for cost-sensitive, high-volume embedded systems requiring reconfigurable logic with predictable timing and low-power operation - especially in motor drives, communications infrastructure, and test equipment.

FAQ

What is the maximum operating junction temperature for XC3S1000-4FGG320I?

The XC3S1000-4FGG320I has a maximum junction temperature of 100°C under continuous operation. This rating assumes proper PCB thermal design including thermal vias under the exposed pad and ≥2 oz copper planes. Derating applies above 85°C ambient; full performance is guaranteed only up to 85°C case temperature per DS099 v2.5.

Does XC3S1000-4FGG320I support partial reconfiguration?

XC3S1000-4FGG320I supports partial reconfiguration in specific configurations using Xilinx ISE 14.7 tools and appropriate floorplanning. It requires dedicated ICAP interface access and careful partitioning of logic into static/dynamic regions. Full documentation is provided in UG380 v2.5 and XAPP290.

What configuration modes does XC3S1000-4FGG320I support?

XC3S1000-4FGG320I supports Master Serial, Slave Serial, JTAG, and Boundary Scan configuration modes. Master Serial uses on-board SPI flash and CCLK-driven bitstream loading; JTAG is used for debugging and initial programming. Configuration mode is selected via MODE pins M[2:0] per Table 32 in DS099.

Is XC3S1000-4FGG320I RoHS compliant?

Yes, XC3S1000-4FGG320I is RoHS compliant and lead-free. The "I" suffix denotes industrial temperature range (–40°C to +100°C) and Pb-free packaging. It meets EU Directive 2011/65/EU and J-STD-609A Class 3 moisture sensitivity level (MSL3).

How many Digital Clock Managers (DCMs) are integrated in XC3S1000-4FGG320I?

XC3S1000-4FGG320I integrates two Digital Clock Managers (DCMs). Each DCM provides independent clock synthesis, phase shifting, frequency multiplication/division, and duty cycle correction. They operate across separate clock domains and support input frequencies from 5 MHz to 200 MHz per DS099 Section 5.2.