AMD XC3S1000-4FGG456C

Overview

XC3S1000-4FGG456C from AMD (formerly Xilinx) is a Spartan-3 FPGA with 1,000,000 system gates, 21,952 logic cells, and 176 I/O pins in a 456-pin Fine-Pitch Ball Grid Array (FBGA) package. It operates at -4 speed grade (tPD = 4.5 ns), supports SelectIO standards including LVCMOS, LVTTL, and SSTL, and targets high-volume cost-sensitive embedded control and interface bridging applications.

For engineers reviewing the XC3S1000-4FGG456C datasheet, pinout, applications, or equivalent options, key selection criteria include I/O count, logic cell density, speed grade timing closure, and compatibility with Xilinx ISE design tools and Spartan-3 configuration interfaces (e.g., Master Serial, JTAG).

Technical Context

The XC3S1000-4FGG456C implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, block RAM (48 × 18 Kbits), and dedicated digital clock managers (DCMs) supporting frequency synthesis, phase shifting, and duty cycle correction. It integrates 128 multipliers for DSP-intensive tasks and supports dual-select memory controllers.

Configuration is performed via serial PROM, parallel slave mode, or JTAG boundary-scan; it requires external configuration memory and supports IEEE 1149.1 compliance. The device uses 1.2 V core voltage and 3.3 V or 2.5 V I/O banks with independent bank voltage assignment.

Key Specifications

Pinout & Package

XC3S1000-4FGG456C is housed in a 456-ball Fine-Pitch Ball Grid Array (FBGA) package with 20 mm × 20 mm body size, 1.0 mm ball pitch, and RoHS-compliant lead-free finish. Pinout follows Xilinx Spartan-3 family standard layout with dedicated configuration, clock, JTAG, and I/O banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC3S1000-4FGG456C, the XC3S1000-4FGG456I extends thermal reliability without altering logic utilization or PCB layout, while XC3S1500-4FGG456C increases gate budget and memory depth at identical footprint and timing performance-enabling scalable architecture without redesign.

Availability

XC3S1000-4FGG456C is available at Aetrix Electronics and suitable for industrial control systems, medical imaging subsystems, and automotive diagnostic gateways requiring stable component supply over extended production lifecycles.

Supply support for XC3S1000-4FGG456C 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, MPSoCs, and ACAPs for data center, AI, and embedded markets.

The Spartan-3 family, including XC3S1000-4FGG456C, was designed for high-volume, cost-optimized digital logic replacement in industrial, automotive, and consumer applications where predictable timing and mature toolchain support are critical.

FAQ

What configuration modes does the XC3S1000-4FGG456C support?

The XC3S1000-4FGG456C supports Master Serial, Slave Serial, Slave Parallel, and JTAG configuration modes. Master Serial uses an external PROM and CCLK/DIN pins; JTAG enables in-system programming and boundary-scan testing. All modes require proper initialization sequencing and voltage ramping per Xilinx UG332 specification. XC3S1000-4FGG456C does not support internal configuration memory or single-chip boot.

Does the XC3S1000-4FGG456C include built-in analog functions like ADCs or DACs?

No, the XC3S1000-4FGG456C contains no integrated analog-to-digital or digital-to-analog converters. It relies on external ADC/DAC components interfaced via its I/O banks. Signal conditioning, sampling control, and data formatting are implemented in programmable logic. XC3S1000-4FGG456C's role is strictly digital logic implementation and timing management-not mixed-signal conversion.

Can the XC3S1000-4FGG456C operate with a 2.5 V I/O voltage while maintaining 1.2 V core voltage?

Yes, XC3S1000-4FGG456C supports mixed I/O bank voltages. Each of its eight I/O banks can be independently set to 1.2 V, 1.5 V, 1.8 V, 2.5 V, or 3.3 V, while the core remains fixed at 1.2 V. This enables direct interfacing with legacy 2.5 V peripherals without level shifters. XC3S1000-4FGG456C requires separate power supplies for VCCO and VCCINT, properly decoupled per Xilinx DS225 guidelines.

Is the XC3S1000-4FGG456C compatible with Xilinx Vivado design tools?

No, XC3S1000-4FGG456C is supported exclusively by the legacy Xilinx ISE Design Suite (v14.7 and earlier). Vivado does not recognize Spartan-3 architecture or generate valid bitstreams for XC3S1000-4FGG456C. Migration to newer FPGA families is required for Vivado compatibility. XC3S1000-4FGG456C bitstream generation, simulation, and timing analysis must use ISE.

What is the maximum operating frequency for internal logic in the XC3S1000-4FGG456C?

The XC3S1000-4FGG456C -4 speed grade guarantees 250 MHz system clock performance for registered logic paths under worst-case conditions. Actual achievable frequency depends on design topology, routing congestion, and DCM usage. Synthesis reports from ISE indicate typical maximum frequencies of 280–320 MHz for lightly utilized paths. XC3S1000-4FGG456C timing closure requires adherence to Xilinx's recommended floorplanning and constraint practices.