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AMD XC3S400A-4FGG320C
- Part No.:
- XC3S400A-4FGG320C
- Manufacturer:
- AMD
- Category:
- FPGAs (Field Programmable Gate Array)
- Package:
- 320-BGA
- Datasheet:
-
XC3S400A-4FGG320C.pdf
- Description:
- IC FPGA 251 I/O 320FBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
XC3S400A-4FGG320C from AMD (formerly Xilinx) is a Spartan-3A FPGA with 400,000 system gates, 216 I/O pins, and configured in a 320-pin Fine-Pitch Ball Grid Array (FBGA) package. It integrates up to 8,064 logic cells, 288 Kbits of block RAM, and supports LVCMOS/LVTTL I/O standards for embedded control and interface bridging applications.
For engineers reviewing the XC3S400A-4FGG320C datasheet, pinout, applications, or equivalent options, key selection factors include I/O count, logic cell density, block RAM capacity, and support for single-ended signaling standards in cost-sensitive industrial control designs.
Technical Context
The XC3S400A-4FGG320C implements a synchronous, SRAM-based configurable logic architecture with dedicated carry chains and distributed RAM. It features eight global clock networks and supports configuration via Master Serial, Slave Serial, or JTAG modes using external PROM or processor-controlled interfaces.
It includes Digital Clock Managers (DCMs) for input clock multiplication, phase shifting, and duty cycle correction - each DCM supports input frequencies from 5 MHz to 200 MHz and provides two independent output clocks with jitter < ±150 ps over temperature and voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Cells | 8,064 - total available LUTs + flip-flops for combinational and sequential logic implementation |
| System Gates | 400,000 - gate count metric aligned with ASIC-equivalent logic density for early-stage sizing |
| I/O Pins | 216 - user-configurable bidirectional pins supporting multiple voltage standards and slew rates |
| Block RAM | 288 Kbits - distributed across 24 x 18-Kbit blocks for FIFO, buffering, or lookup table storage |
| DCM Units | 4 - each provides clock synthesis, phase alignment, and jitter reduction without external PLL components |
| Package | 320-pin FGG (Fine-Pitch BGA) - 15×15 mm body, 1.0 mm ball pitch, RoHS-compliant |
Pinout & Package
XC3S400A-4FGG320C is housed in a 320-ball fine-pitch BGA (FGG) package with 16 power/ground balls distributed across the array and dedicated configuration, JTAG, and clock input pins. Pin functions are defined per bank and support independent I/O standard assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G1 | CONFIG_DONE | Open-drain status signal indicating successful configuration completion |
| P2 | TCK | JTAG test clock input for boundary-scan and programming operations |
| R1 | PROGRAM_B | Active-low asynchronous reset that clears configuration memory and restarts boot process |
| V1 | CLK0 | Dedicated global clock input for primary DCM reference source |
| Y2 | VCCO_0 | Output bank supply for Bank 0 - sets I/O voltage level (1.2V/1.5V/1.8V/2.5V/3.3V) |
| W17 | GND | Signal ground reference for adjacent I/O banks and internal logic |
Key Features
| Feature | Design Value |
|---|---|
| Digital Clock Manager (DCM) | Four integrated DCMs enable precise clock synthesis and skew management without external PLL ICs |
| SelectIO Technology | Per-bank I/O voltage support allows mixed-standard interfaces (e.g., 3.3V CPU bus + 1.8V sensor interface) |
| Configuration Security | Bitstream encryption option prevents reverse engineering of programmed logic functionality |
| MultiBoot Support | Enables dual-image configuration storage and runtime switching between firmware versions |
Applications
| Industrial PLC Interface Module | Medical Imaging Data Bridge |
|---|---|
Use Scenario: Real-time protocol translation between legacy RS-485 fieldbus and modern Ethernet backbone in programmable logic controllers. IC Role / Device Role / Timing Role: FPGA acts as deterministic protocol gateway with hard-wired state machines and synchronized I/O timing. Use Value: 216 I/O pins and four DCMs allow concurrent handling of multiple serial buses and precise timing alignment across isolated domains. | Use Scenario: Aggregation and preprocessing of parallel ADC streams from ultrasound transducer arrays before transmission to host DSP. IC Role / Device Role / Timing Role: FPGA performs pixel-level filtering, frame buffering, and packetization using block RAM and logic cells. Use Value: 288 Kbits of block RAM enables dual-frame buffering while 8,064 logic cells implement real-time FIR filters at >20 MSPS. |
| Automotive Diagnostic Tool Adapter | Test Equipment Pattern Generator |
Use Scenario: Emulation of multiple ECU communication protocols (K-Line, CAN, LIN) within handheld diagnostic hardware. IC Role / Device Role / Timing Role: FPGA implements protocol-specific physical layer timing and arbitration logic with sub-microsecond response. Use Value: SelectIO per-bank voltage control supports mixed-voltage automotive bus interfaces on a single device. | Use Scenario: Generation of high-speed digital stimulus patterns for ATE systems targeting ASIC validation. IC Role / Device Role / Timing Role: FPGA serves as deterministic pattern sequencer with precise edge placement controlled by DCM outputs. Use Value: Four DCM units provide independent, jitter-critical clocks for multi-rate vector generation up to 200 MHz. |
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 (11,648 LC), same package, but no bitstream encryption support | Better suited for larger state machines or wider datapaths; lacks security for IP-sensitive deployments | Choose when additional logic resources are required and configuration security is not mandated |
| XC6SLX45-2CSG324C | Newer Spartan-6 family, 43,661 logic cells, 2.5V core, 324-pin CSBG package | Offers higher performance, lower static power, and enhanced DSP slices - requires PCB redesign | Prefer for new designs needing scalability, DDR2/3 memory interface, or extended temperature range |
Compared with XC3S400A-4FGG320C, XC3S500E-4FG320C delivers more logic capacity in identical packaging but omits encryption, while XC6SLX45-2CSG324C provides architectural upgrades at the cost of layout compatibility and increased BOM complexity.
Availability
XC3S400A-4FGG320C is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and test equipment requiring stable component supply and long-term obsolescence mitigation.
Supply support for XC3S400A-4FGG320C 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 legacy Spartan-3A product lines for industrial and aerospace continuity programs.
The Spartan-3A family was designed for cost-optimized, low-power FPGA applications in industrial control, communications infrastructure, and embedded vision where predictable timing and mature toolchain support are critical.
FAQ
What is the maximum operating frequency of the XC3S400A-4FGG320C?
The XC3S400A-4FGG320C supports internal logic operation up to 280 MHz under typical conditions. Its Digital Clock Managers (DCMs) accept input clocks from 5 MHz to 200 MHz and generate stable outputs with jitter below ±150 ps. The actual achievable system frequency depends on design routing, resource utilization, and I/O timing constraints - verified during place-and-route in Xilinx ISE 14.7.
Does the XC3S400A-4FGG320C support JTAG programming?
Yes, the XC3S400A-4FGG320C fully supports IEEE 1149.1 JTAG boundary-scan and in-system programming via TCK, TMS, TDI, and TDO pins. JTAG mode enables configuration, debugging, and verification without requiring external PROM or microcontroller intervention - essential for field updates and production test of the XC3S400A-4FGG320C.
Can the XC3S400A-4FGG320C be used in automotive applications?
The XC3S400A-4FGG320C is rated for commercial temperature range (0°C to 85°C) and is not AEC-Q100 qualified. While it has been deployed in non-safety-critical automotive diagnostic tools and prototyping platforms, AMD does not certify the XC3S400A-4FGG320C for under-hood or ASIL-B/C systems. For such use, consider automotive-grade Spartan-6 or Zynq-7000 derivatives.
What configuration modes does the XC3S400A-4FGG320C support?
The XC3S400A-4FGG320C supports Master Serial (via on-board PROM), Slave Serial (driven by external controller), and JTAG configuration modes. Mode selection is determined by M[2:0] pin states at power-up. All three methods load the same bitstream format and are fully supported in Xilinx ISE 14.7 - enabling flexible deployment of the XC3S400A-4FGG320C across development, manufacturing, and field service environments.
Is bitstream encryption available on the XC3S400A-4FGG320C?
Yes, the XC3S400A-4FGG320C supports optional AES-128 bitstream encryption using a user-provided 128-bit key. Encryption is enabled during bitstream generation in ISE and requires an external battery-backed RAM or flash memory to store the decryption key. This feature protects intellectual property in deployed systems using the XC3S400A-4FGG320C.
XC3S400A-4FGG320C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- AMD
- Series:
- Spartan®-3A
- 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:
- 368640
- Number of I/O:
- 251
- Number of Gates:
- 400000
- Voltage - Supply:
- 1.14V ~ 1.26V
- Mounting Type:
- Surface Mount
- Operating Temperature:
- 0°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 320-FBGA (19x19)
XC3S400A-4FGG320C FAQ
1.How can I place an order for XC3S400A-4FGG320C through Aetrix?
Please submit a Request for Quotation (RFQ) for XC3S400A-4FGG320C 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 XC3S400A-4FGG320C reliable?
The price and inventory of XC3S400A-4FGG320C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for XC3S400A-4FGG320C is usually 5 days.
3.What payment methods are accepted for XC3S400A-4FGG320C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for XC3S400A-4FGG320C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for XC3S400A-4FGG320C?
XC3S400A-4FGG320C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your XC3S400A-4FGG320C 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 XC3S400A-4FGG320C?
For technical support, including XC3S400A-4FGG320C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your XC3S400A-4FGG320C requirements.
6.How does Aetrix verify that XC3S400A-4FGG320C is sourced from the original manufacturer or authorized distributors?
All XC3S400A-4FGG320C 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 XC3S400A-4FGG320C meets industry standards.
7.What is the process for return or replacement of XC3S400A-4FGG320C?
All XC3S400A-4FGG320C units undergo pre-shipment inspection (PSI). If there is an issue with XC3S400A-4FGG320C, 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 XC3S400A-4FGG320C part is unused and in its original packaging.
Return procedure for XC3S400A-4FGG320C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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