XC3S1400AN-4FGG676I AMD Xilinx Spartan-3AN FPGA 1.4M Gates 502 I/O 676-FBGA

XC3S1400AN-4FGG676I Product Overview

The XC3S1400AN-4FGG676I is a high-performance non-volatile FPGA from AMD Xilinx in the Spartan-3AN series, manufactured on mature 90nm technology. It perfectly combines the programmable flexibility of SRAM with the non-volatile advantages of Flash memory. The device features 1.4 million system gates, 25,344 logic cells, 502 user I/O pins, integrated 589,824 bits of block RAM, and up to 16Mbits of embedded Flash memory.

This industrial-grade device supports -40°C to 100°C operation. With speed grade 4, it achieves maximum operating frequency up to 667MHz. The device comes in a 676-pin FBGA package (27×27mm) with surface mount design.

The XC3S1400AN is the flagship device in the Spartan-3AN platform, offering the industry's largest on-chip user Flash capacity (up to 11Mbits user-accessible). Officially declared Last Time Buy by AMD Xilinx, limited inventory remains available through select distributors.

XC3S1400AN-4FGG676I Core Features

Logic Resources： 1.4M system gates, 25,344 logic cells, 2,816 configurable logic blocks. XC3S1400AN is the highest density device in the Spartan-3AN series

Embedded Memory： 589,824 bits block RAM, 176Kbits distributed RAM with byte-write enable for data buffering, FIFOs, and image processing

On-Chip Flash Memory： 16Mbits embedded Flash storage with up to 11Mbits user-accessible. Supports MultiBoot functionality for storing at least two configuration images

DSP Processing： 32 dedicated 18x18 hardware multipliers for high-performance digital signal processing

I/O Interfaces： 502 user I/O pins supporting 26 single-ended and differential I/O standards including LVTTL, LVCMOS, HSTL, SSTL, LVDS, RSDS with hot-swap compliance

Differential I/O： Up to 227 differential I/O pairs supporting TMDS and PPDS display standards

Clock Management： 8 Digital Clock Managers (DCMs) for clock synthesis, frequency division/multiplication, phase shifting, duty cycle adjustment, and clock de-skewing

Maximum Frequency： Speed grade 4 with operating frequency up to 667MHz and I/O data rates up to 1.25Gbps differential signaling

Configuration Modes： Supports 7 modes including internal SPI Flash configuration, Master Serial, Slave Serial, Slave Parallel, BPI, and JTAG

Supply Voltage： Core voltage 1.14V to 1.26V, I/O voltage supports 1.2V, 1.5V, 1.8V, 2.5V, 3.3V multi-level standards

Process Technology： 90nm CMOS process, production-proven balancing performance and cost

Security Features： Built-in DeviceDNA factory pre-assigned unique serial number with user-definable authentication algorithms. 100,000 program/erase cycles with 20-year data retention

Power Management： Suspend mode reduces power by over 40% with <100ms wake-up; Hibernate mode reduces static power by up to 99%

Package Type： 676-pin FBGA (27×27mm) with 1.0mm ball pitch, surface mount, pin-compatible with Spartan-3A platform

Temperature Range： Industrial grade -40°C to 100°C (TJ)

Lifecycle Status： Last Time Buy with estimated EOL 2022, 12-week standard lead time

XC3S1400AN-4FGG676I Applications

High-Reliability Industrial Control： Industrial automation, PLC controllers, motion control systems. On-chip Flash enables instant-on operation without external configuration memory

Communications Infrastructure： Protocol bridging, packet processing, interface conversion. 502 I/Os with 8 DCMs meet complex communications interface requirements

Embedded System Integration： Paired with MicroBlaze soft processor, on-chip Flash stores embedded application code for single-chip embedded systems

Security-Critical Applications： DeviceDNA with user-definable authentication prevents reverse engineering, cloning, and overbuilding. Ideal for encryption and IP protection

Display Interface Bridging： TMDS and PPDS display standard support for LCD panel interface conversion, video processing, and display controllers

Data Acquisition and Processing： 32 DSP multipliers with rich memory resources for sensor data acquisition, signal conditioning, and real-time processing

Test and Measurement： 502 I/Os supporting multiple voltage standards for ATE equipment, logic analyzers, and data acquisition cards

XC3S1400AN-4FGG676I Key Advantages

SRAM plus Flash Technology Fusion： The Spartan-3AN platform combines performance and flexibility of 90nm SRAM FPGAs with non-volatile Flash integration. XC3S1400AN provides single-chip ready-to-use solution without external PROMs with instant-on power-up while retaining reprogrammability

Industry's Largest On-Chip User Flash： 16Mbits embedded Flash (11Mbits user-accessible) — over 1000 times larger than competing products. Supports FPGA configuration bitstream storage, user code and data, field upgrades, and multi-configuration images, eliminating external memory chips

502 I/O Maximum Expansion Capability： Industry's highest I/O integration density covering high-density single-ended to high-speed differential signals. Ideal for large ASIC prototyping, backplane communications, and I/O-intensive applications

Comprehensive Security Protection： DeviceDNA factory preset unique serial code with programmable Flash user field for authentication results. Supports user-definable authentication including "time bomb" limited functionality, partial disable, even self-destruct mechanisms

MultiBoot Flexible Configuration Upgrades： Multiple configuration files in on-chip Flash enabling rollback to previous stable version if field firmware upgrade fails, enhancing system reliability

Innovative Low Power Modes： Dual-mode power management with Suspend mode saving >40% power plus fast wake-up, and Hibernate mode reducing static power by up to 99%

Industrial-Grade High Reliability： -40°C to 100°C wide temperature industrial grade (I suffix) with 20-year data retention and 100,000 program/erase cycles

Mature Development Ecosystem： AMD Xilinx ISE design suite with complete development flow, rich IP core library (PCI, PCIe, CAN, SPI, I2C), MicroBlaze soft processor support

Availability and Stock： Last Time Buy status with limited inventory available through select distributors. Suntsu stock: 1,856 units, WIN SOURCE stock: 2,100 units. Pricing ranges approximately $138to$3,200 with minimum order quantity of 1 piece

Platform Compatibility： Pin-compatible with Spartan-3A platform for seamless migration. Same PCB can accommodate different logic capacity devices for product family development

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FAQ:

1. What is the XC3S1400AN-4FGG676I and its key specifications?
   This is an AMD Xilinx Spartan‑3AN series FPGA built on a 90 nm process. It is a non‑volatile FPGA with a massive 1.4 M system gates (≈ 25,344 logic cells), 576 Kb of block RAM, and 32 dedicated 18×18 multipliers. The most important feature of the Spartan‑3AN family is the on‑chip configuration Flash memory, which eliminates the need for an external boot PROM. The device offers up to 502 user I/O pins in a 676‑pin FBGA (FGG676) package. The “‑4” is a fast speed grade, and “I” guarantees industrial temperature operation (‑40 °C to +100 °C). It is designed for single‑chip, secure, instant‑on embedded systems that require logic, memory, and I/O expansion.

2. How does the Spartan‑3AN differ from the Spartan‑3A? Why choose the “AN” version?
   The Spartan‑3A requires an external configuration memory (SPI Flash, Platform Flash, etc.) to load its bitstream at power‑up. The Spartan‑3AN family (AN = Advanced Non‑volatile) integrates a large on‑chip Flash memory that stores the configuration data directly inside the package. This provides several advantages: single‑chip solution (no external PROM), instant‑on boot, very high security (bitstream cannot be copied from external pins), and support for MultiBoot (multiple configuration images stored in the internal Flash). The XC3S1400AN is essentially a Spartan‑3A with built‑in Flash — ideal for space‑constrained, security‑conscious industrial designs.

3. How does the XC3S1400AN compare to the Spartan‑6 or Spartan‑7 families?
   The Spartan‑3AN is built on a 90 nm process, while the Spartan‑6 uses 45 nm and the Spartan‑7 uses 28 nm. The newer families offer higher logic density, lower power, and faster DSP/transceivers. However, the Spartan‑3AN retains one unique advantage: the on‑chip Flash memory for configuration storage. Neither the Spartan‑6 nor Spartan‑7 has internal configuration Flash; they require external memory. Therefore, the XC3S1400AN is still the preferred choice in applications that demand a secure, single‑chip, instant‑on FPGA solution without any external boot components, especially in harsh industrial environments where board space and reliability are critical.

4. What is the role of the internal Flash memory, and what size is it?
   The XC3S1400AN contains on‑chip configuration Flash large enough to hold the full bitstream (the device needs approximately 4.2 Mbits for configuration). The internal Flash also provides extra user Flash memory — typically a few megabits — that can be used to store non‑volatile data such as calibration tables, serial numbers, or application parameters. The Flash supports MultiBoot, allowing you to store two (or more) configuration images and switch between them dynamically. All configuration and user data remain completely inside the chip, making the design extremely resistant to reverse engineering and bitstream theft.

5. How many I/O pins does the FGG676 package provide, and what I/O standards are supported?
   The FGG676 package offers up to 502 user I/O pins, organised in eight banks. Each bank can be independently powered and supports a wide selection of single‑ended and differential standards: LVCMOS (1.2 V – 3.3 V), LVTTL, SSTL, HSTL, PCI 3.0, LVDS, RSDS, and mini‑LVDS. The I/O pins feature digitally controlled impedance (DCI) and adjustable slew rate, making it straightforward to interface with memories (DDR, SDR), parallel buses, and high‑speed LVDS links without external termination resistors.

6. What are the block RAM and multiplier resources, and how can they be used?
   The XC3S1400AN provides 576 Kb of true dual‑port block RAM, organised as 32 blocks of 18 Kb each. The block RAMs can be configured as single‑port, dual‑port, or FIFO memories. In addition, it contains 32 dedicated 18×18 multipliers capable of operating at up to 200 MHz (‑4 speed grade). These multipliers are ideal for implementing digital filters, FFTs, correlators, and other DSP‑intensive functions. Combined with the logic fabric, the FPGA can efficiently handle moderate‑complexity signal processing and control tasks.

7. What does the “‑4” speed grade and “I” temperature designation mean?
   The ‑4 speed grade is the fastest offered in the Spartan‑3AN family, providing higher logic and DSP performance than the ‑5 grade. The “I” suffix indicates an industrial temperature range of ‑40 °C to +100 °C. Together, “‑4I” ensures the FPGA delivers maximum processing throughput while remaining fully reliable in outdoor, automotive, and factory‑floor environments where temperatures can vary widely.

8. What is the typical power consumption, and what are the supply voltages?
   The XC3S1400AN requires a 1.2 V core supply and typically a 3.3 V or 2.5 V I/O supply (depending on the I/O bank configuration). Static power consumption is very low, usually under 100 mW. Dynamic power scales with design complexity and clock frequency, but typical total on‑chip power remains well under 1 W for many applications. The on‑chip Flash also draws a small current during read/write operations. The 90 nm process provides a good balance between performance and power for cost‑sensitive, long‑life industrial products.

9. How do I program and debug the XC3S1400AN? What development tools are needed?
   Programming and debugging are performed via JTAG. To load a new bitstream into the internal Flash, you can use Xilinx ISE Design Suite (or its free ISE WebPACK) together with a low‑cost Platform Cable USB II programmer. The ISE tool generates the programming file, and the iMPACT utility writes it directly to the on‑chip Flash. For debugging, ChipScope Pro (integrated in ISE) provides an embedded logic analyzer. The Spartan‑3AN family is fully supported by the mature and stable ISE ecosystem, making development straightforward for experienced Xilinx users.

10. What are the most typical applications for the XC3S1400AN-4FGG676I?
    Thanks to its non‑volatile, single‑chip design, the XC3S1400AN is widely used in industrial motor controllers, secure communication modules, medical instrumentation, automotive ECUs, military and aerospace systems, and embedded vision platforms. It excels in any application where an external configuration memory is undesirable — for reasons of space, security, or reliability — and where a proven, long‑lifecycle FPGA with abundant I/O and logic is required.