XC3S400AN-4FGG400I Xilinx (AMD) Spartan-3AN FPGA 400K System Gates 8064 Logic Cells 311 I/O Non-Volatile 400-FBGA

XC3S400AN-4FGG400I Product Overview

The XC3S400AN-4FGG400I is a Field Programmable Gate Array (FPGA) from AMD (formerly Xilinx), part of the Spartan-3AN family, housed in a 400-pin FBGA (FGG400) package and manufactured using proven 90nm CMOS technology[citation:5][citation:6]. This device belongs to the non-volatile Spartan-3AN platform, combining the high performance of SRAM-based FPGAs with the configuration convenience of on-chip flash memory. XC3S400AN-4FGG400I integrates up to 400K system gates, including 8064 logic cells, 896 CLBs, 360Kbits of Block RAM, and 56Kbits of distributed RAM[citation:2][citation:4][citation:7]. The chip provides 311 user I/O pins supporting 26 standards such as LVTTL, LVCMOS, SSTL, and LVDS[citation:2][citation:6]. XC3S400AN-4FGG400I core voltage ranges from 1.14V to 1.26V, with I/O voltage configurable from 1.2V to 3.3V, and it operates over an industrial temperature range of -40°C to +100°C[citation:3][citation:4][citation:5]. The device features 2380Kbits of user flash, supports MultiBoot multi-version bitstream fallback, and incorporates Device DNA security identification to prevent reverse engineering and cloning[citation:2][citation:6][citation:7]. The XC3S400AN-4FGG400I is an ideal choice for space-constrained applications requiring high reliability and fast configuration. XC3S400AN-4FGG400I is a versatile and dependable FPGA.

XC3S400AN-4FGG400I Core Features

Core Technology: XC3S400AN-4FGG400I is a non-volatile SRAM-based FPGA with integrated advanced Flash, eliminating external configuration chips

Logic Resources: XC3S400AN-4FGG400I provides 400K system gates, 8064 logic cells, 896 CLBs, 3584 ALMs

On-Chip Memory: XC3S400AN-4FGG400I integrates 360Kbits Block RAM + 56Kbits Distributed RAM + 2380Kbits User Flash

User I/O: XC3S400AN-4FGG400I features 311 user I/O pins supporting 26 single-ended and differential standards

Clock Management: XC3S400AN-4FGG400I includes 4 Digital Clock Managers (DCMs) with DLL and clock synthesis capabilities

DSP Capability: XC3S400AN-4FGG400I contains 20 dedicated multipliers for efficient DSP implementation

Security Features: XC3S400AN-4FGG400I provides permanent Device DNA serial number, MultiBoot bitstream fallback, UID protection, hot-swap support[citation:3][citation:6]

Operating Conditions: XC3S400AN-4FGG400I core voltage 1.14V-1.26V, I/O voltage 1.2V-3.3V, industrial -40°C to +100°C[citation:4][citation:5][citation:7]

Package: XC3S400AN-4FGG400I uses a 400-pin FBGA (21x21mm), RoHS compliant[citation:4][citation:10]

XC3S400AN-4FGG400I is designed for robust performance.

XC3S400AN-4FGG400I Applications

Industrial Automation: XC3S400AN-4FGG400I is used in motor control, PLC systems, industrial network interfaces

Communication Equipment: XC3S400AN-4FGG400I is applied in routers, switches, base station signal processing

Consumer Electronics: XC3S400AN-4FGG400I is found in flat panel displays, set-top boxes, gaming devices

Automotive Electronics: XC3S400AN-4FGG400I supports infotainment systems, telematics, GPS navigation[citation:7]

Medical Equipment: XC3S400AN-4FGG400I enables imaging processing, diagnostic instruments

Space-Constrained Applications: XC3S400AN-4FGG400I is suitable for blade servers, miniaturized embedded systems[citation:7]

XC3S400AN-4FGG400I Key Advantages

Non-Volatile Advantage: XC3S400AN-4FGG400I integrates on-chip user flash, eliminating the need for external configuration memory, reducing PCB area and component count while improving system reliability[citation:6].

Superior Security: XC3S400AN-4FGG400I built-in Device DNA security mechanism with multiple protection features effectively prevents design reverse engineering, cloning, and overbuilding[citation:6][citation:9].

Flexible Configuration & Upgrades: XC3S400AN-4FGG400I supports MultiBoot multi-version bitstream fallback, enabling field upgrades, test modes, and multi-system configurations[citation:3][citation:7].

Low Power & Fast Wake-Up: XC3S400AN-4FGG400I suspend mode reduces power consumption by over 40% while maintaining configuration and state data, with fast wake-up for battery-powered devices[citation:6].

Wide I/O Standard Support: XC3S400AN-4FGG400I supports LVDS, RSDS, SSTL, TMDS and other standards, especially suitable for display applications, with hot-swap compliance[citation:6].

Mature Platform Ecosystem: XC3S400AN-4FGG400I is based on proven 90nm process, pin-compatible with Spartan-3A platform for density migration and design reuse[citation:6].

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FAQ

1. What is the difference between XC3S400AN-4FGG400I and the regular Spartan-3A series?
   
   • XC3S400AN-4FGG400I integrates advanced on-chip flash technology on top of Spartan-3A, supporting non-volatile configuration without external configuration chips.
   • XC3S400AN-4FGG400I built-in user flash can be used for system data storage while reducing PCB area and overall dimensions, improving system reliability[citation:6][citation:7].
2. What is the practical significance of the "non-volatile" feature?
   
   • XC3S400AN-4FGG400I configuration data is stored in on-chip flash and is retained after power-off, allowing rapid configuration startup upon power-up.
   • XC3S400AN-4FGG400I requires no external SPI Flash or other configuration devices, simplifying hardware design and reducing BOM cost[citation:6].
3. What is the capacity of the built-in user flash? Can it be used as regular storage?
   
   • XC3S400AN-4FGG400I has 2380Kbits (approximately 2.3Mb) of user flash[citation:2][citation:6].
   • XC3S400AN-4FGG400I flash can serve as system-level data storage for firmware, parameters, or logs, supporting flexible partition protection and erase functions.
4. What I/O voltage standards does this device support?
   
   • XC3S400AN-4FGG400I supports LVTTL, LVCMOS33/25/18/15/12, HSTL, SSTL18/2/3, LVDS, RSDS, TMDS, and more standards[citation:2][citation:6].
   • XC3S400AN-4FGG400I I/O output drive voltage ranges from 1.2V to 3.3V, accommodating various system level requirements[citation:5].
5. What is the Device DNA security mechanism?
   
   • XC3S400AN-4FGG400I has a built-in permanent unique Device DNA serial number for identity authentication.
   • XC3S400AN-4FGG400I combined with custom algorithms prevents cloning and reverse engineering, and can even support "self-destruct" functionality to protect critical designs[citation:6][citation:9].
6. What tools are needed to develop with this FPGA?
   
   • XC3S400AN-4FGG400I can be developed using AMD (Xilinx)'s official Vivado or ISE development suite for design, synthesis, and implementation.
   • XC3S400AN-4FGG400I hardware programmers can perform in-circuit configuration and debugging via JTAG interface.
   • XC3S400AN-4FGG400I official IP cores and reference designs accelerate the development process.
7. What is the operating temperature range? What applications is it suitable for?
   
   • XC3S400AN-4FGG400I industrial temperature range is -40°C to +100°C[citation:3][citation:4][citation:7].
   • XC3S400AN-4FGG400I is suitable for automotive electronics, industrial control, outdoor equipment, and other applications with high temperature requirements.
8. How many user I/O pins does this chip have?
   
   • XC3S400AN-4FGG400I provides 311 user I/O pins[citation:4][citation:5][citation:11].
   • XC3S400AN-4FGG400I in the 400-pin FBGA package, the remaining pins are used for power, ground, configuration, and clock management.
9. What does the MultiBoot function do?
   
   • XC3S400AN-4FGG400I MultiBoot allows storing two or more configuration bitstreams within the chip, supporting remote field upgrades.
   • XC3S400AN-4FGG400I can automatically fall back to a backup configuration if the primary configuration fails, improving system reliability[citation:3][citation:7].
10. What are the upgrade options if I need larger capacity or higher performance?
    
    • For larger capacity, consider XC3S700AN or XC3S1400AN, which offer 700K and 1400K system gates respectively[citation:2][citation:6].
    • For higher performance, XC3S400AN-4FGG400I can be upgraded to Spartan-6 or Artix-7 series which provide more logic resources and advanced features.