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AMD XC3S400-4FG320I
- Part No.:
- XC3S400-4FG320I
- Manufacturer:
- AMD
- Category:
- FPGAs (Field Programmable Gate Array)
- Package:
- 320-BGA
- Datasheet:
-
XC3S400-4FG320I.pdf
- Description:
- IC FPGA 221 I/O 320FBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,705
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Product details
Overview
XC3S400-4FG320I from AMD (formerly Xilinx) is a Spartan-3 FPGA with 400,000 system gates, 241 I/O pins, and configured in a 320-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 cost-sensitive embedded control and interface bridging applications.
For engineers reviewing the XC3S400-4FG320I datasheet, pinout, applications, or equivalent options, key selection criteria include I/O count, logic cell density, supported voltage standards (2.5 V/3.3 V), configuration mode (Master Serial/JTAG), and thermal performance in industrial temperature range (-40°C to +100°C).
Technical Context
The XC3S400-4FG320I integrates 8,064 configurable logic blocks (CLBs), 24 dedicated multipliers (18 × 18), and up to 294 Kbits of distributed RAM. Its configuration is performed via Master Serial mode using external PROM or JTAG boundary-scan, supporting IEEE 1149.1 compliance.
It features Digital Clock Managers (DCMs) for clock synthesis, phase shifting, and duty-cycle correction across four independent clock domains. All I/O banks support independent VCCO supply (1.2 V to 3.3 V) and programmable slew rate and drive strength per pin group.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Cells | 8,064 CLBs - provides sufficient resources for medium-complexity digital controllers and protocol translators. |
| System Gates | 400,000 - defines routing and logic capacity suitable for bridging between legacy and modern interfaces. |
| I/O Pins | 241 user I/O - enables high-pin-count peripheral interfacing without external glue logic. |
| Speed Grade | -4 (tPD = 4.5 ns) - guarantees maximum combinational delay for timing-critical synchronous paths. |
| Operating Temperature | -40°C to +100°C - qualified for industrial environments without derating. |
| Configuration Mode | Master Serial or JTAG - allows flexible programming via SPI PROM or debug probe during development and field updates. |
Pinout & Package
Package: 320-pin Fine-Pitch Ball Grid Array (FBGA), 19 mm × 19 mm, 1.0 mm pitch, RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1 | VCCINT | 1.2 V core supply input - must be decoupled locally with low-ESR ceramic capacitors. |
| P2 | VCCO_0 | 2.5 V or 3.3 V I/O bank 0 supply - sets voltage standard for associated pins (A1–D13). |
| T14 | PROGRAM_B | Active-low configuration reset - initiates reconfiguration when pulled low externally. |
| R15 | DONE | Open-drain status output - goes high-Z after successful configuration, pulled up to confirm completion. |
| M16 | TCK | JTAG test clock input - synchronizes boundary-scan operations per IEEE 1149.1 timing. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Clock Manager (DCM) | Four independent DCMs provide jitter-free clock multiplication, division, phase shift, and duty-cycle correction without external PLL components. |
| SelectIO™ Technology | Per-bank I/O voltage support (1.2 V–3.3 V) enables mixed-voltage interfacing to legacy and modern peripherals. |
| Dedicated Multipliers | 24 × 18-bit multipliers accelerate arithmetic-intensive tasks such as motor control loop computation or FIR filtering. |
| Distributed RAM | 294 Kbits of fast, asynchronous block RAM - usable as FIFOs, lookup tables, or state storage without external memory. |
Applications
| Industrial Motor Control | Legacy Interface Bridging |
|---|---|
Use Scenario: Real-time PWM generation and encoder feedback processing in servo drives. IC Role / Device Role / Timing Role: FPGA fabric implements closed-loop control logic with sub-microsecond latency and deterministic timing. Use Value: 241 I/O pins allow direct connection to gate drivers, encoders, and analog front-ends; DCMs stabilize PWM carrier frequency against temperature drift. | Use Scenario: Converting parallel ATA signals to SDIO or SPI for flash storage migration in aging medical devices. IC Role / Device Role / Timing Role: Protocol translator with synchronous state machines and timing calibration for skew compensation. Use Value: SelectIO™ supports both 3.3 V ATA and 1.8 V SDIO signaling on separate banks; 400K gates accommodate dual-interface logic and buffer management. |
| Automated Test Equipment (ATE) | Communications Backplane Monitoring |
Use Scenario: High-speed digital pattern generation and response capture at 100+ MHz. IC Role / Device Role / Timing Role: Configurable I/O with programmable slew rate and termination controls signal integrity on long PCB traces. Use Value: -4 speed grade ensures setup/hold timing margins for 100 MHz test vectors; 241 I/O supports parallel 32-bit bus testing. | Use Scenario: Monitoring PCIe and SATA link status, error counters, and hot-plug events in telecom chassis. IC Role / Device Role / Timing Role: Glue logic and status aggregator interfacing with multiple PHYs and microcontroller host. Use Value: Independent I/O banks isolate 1.2 V PCIe and 3.3 V SATA signaling; JTAG enables in-system diagnostics without host intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FPGA-based interface and control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XC3S500E-4FG320C | Higher logic density (17,280 CLBs), same package and speed grade, but commercial temp range (0°C to +85°C). | Suitable for non-industrial environments where extended temperature is not required. | Select when additional logic resources are needed and thermal constraints permit commercial-grade operation. |
| XC6SLX45-3CSG324C | Next-generation Spartan-6 architecture, 43,661 logic cells, 2.5 V core, different pinout and configuration scheme. | Requires PCB redesign and toolchain migration; offers lower static power and enhanced DSP slices. | Choose for new designs prioritizing power efficiency and future roadmap alignment over drop-in compatibility. |
Compared with XC3S400-4FG320I, XC3S500E-4FG320C delivers more logic in identical packaging but lacks industrial temperature rating, while XC6SLX45-3CSG324C provides architectural improvements at the cost of layout and firmware rework.
Availability
XC3S400-4FG320I is available at Aetrix Electronics and suitable for industrial motor control, legacy interface bridging, and automated test equipment requiring stable component supply and long-term obsolescence management.
Supply support for XC3S400-4FG320I 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 continues to support legacy Spartan-3 product lines with documentation, tools, and lifecycle guidance.
The Spartan-3 family was designed for cost-optimized, high-volume embedded applications requiring balanced logic density, I/O flexibility, and industrial temperature operation.
FAQ
What is the maximum operating frequency of the XC3S400-4FG320I?
The XC3S400-4FG320I has a -4 speed grade, meaning its maximum guaranteed internal clock frequency is 225 MHz for register-to-register paths under worst-case industrial conditions. Actual achievable frequency depends on design placement, routing, and resource utilization. The XC3S400-4FG320I DCMs can generate higher-frequency clocks (up to 320 MHz) with appropriate feedback, but system-level timing closure must be verified per implementation.
Does the XC3S400-4FG320I support JTAG configuration?
Yes, the XC3S400-4FG320I fully supports IEEE 1149.1 JTAG boundary-scan for programming, debugging, and verification. It uses TDI, TDO, TMS, TCK, and TRTI pins for JTAG access and can be configured in JTAG mode without external PROM. The XC3S400-4FG320I also supports JTAG-based partial reconfiguration in compatible toolchains.
What voltage levels are supported on the I/O banks of the XC3S400-4FG320I?
The XC3S400-4FG320I supports independent VCCO supplies per I/O bank, ranging from 1.2 V to 3.3 V. Common configurations include 3.3 V for LVTTL/LVCMOS, 2.5 V for SSTL2, and 1.8 V with external level-shifting since native 1.8 V VCCO is not supported. Each bank's voltage setting determines compatible I/O standards, and the XC3S400-4FG320I requires proper bank-specific decoupling.
Is the XC3S400-4FG320I still in production?
The XC3S400-4FG320I is listed as NRND (Not Recommended for New Designs) by AMD/Xilinx, but active inventory and authorized channel supply remain available through Aetrix Electronics. Lifecycle notifications, last-time-buy windows, and obsolescence mitigation plans are provided for ongoing production programs using the XC3S400-4FG320I.
Can the XC3S400-4FG320I be used in automotive applications?
No, the XC3S400-4FG320I is rated for industrial temperature range (-40°C to +100°C) and is not AEC-Q100 qualified. It lacks automotive-specific reliability testing, failure-in-time (FIT) data, and extended temperature validation required for automotive ECUs. For automotive use, AMD recommends Spartan-7 or Zynq-7000 families instead of the XC3S400-4FG320I.
XC3S400-4FG320I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- AMD
- Series:
- Spartan®-3
- Package/Case:
- 320-BGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Number of LABs/CLBs:
- 896
- Number of Logic Elements/Cells:
- 8064
- Total RAM Bits:
- 294912
- Number of I/O:
- 221
- Number of Gates:
- 400000
- Voltage - Supply:
- 1.14V ~ 1.26V
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 320-FBGA (19x19)
XC3S400-4FG320I FAQ
1.How can I place an order for XC3S400-4FG320I through Aetrix?
Please submit a Request for Quotation (RFQ) for XC3S400-4FG320I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for XC3S400-4FG320I reliable?
The price and inventory of XC3S400-4FG320I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for XC3S400-4FG320I is usually 5 days.
3.What payment methods are accepted for XC3S400-4FG320I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for XC3S400-4FG320I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for XC3S400-4FG320I?
XC3S400-4FG320I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your XC3S400-4FG320I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for XC3S400-4FG320I?
For technical support, including XC3S400-4FG320I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your XC3S400-4FG320I requirements.
6.How does Aetrix verify that XC3S400-4FG320I is sourced from the original manufacturer or authorized distributors?
All XC3S400-4FG320I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that XC3S400-4FG320I meets industry standards.
7.What is the process for return or replacement of XC3S400-4FG320I?
All XC3S400-4FG320I units undergo pre-shipment inspection (PSI). If there is an issue with XC3S400-4FG320I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The XC3S400-4FG320I part is unused and in its original packaging.
Return procedure for XC3S400-4FG320I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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