Device Overview
XC3S400AN-4FGG400I uses the same XC3S400AN fabric and FGG400 pin resources as the C-grade orderable, but its final I suffix selects the industrial grade. Resource counts remain 8,064 logic cells, 360 Kbits block RAM, 20 multipliers, four DCMs and 4 Mbits of in-system flash.
For this exact package, AMD lists 311 user I/O and input-only pins with 142 differential pairs. The key procurement distinction from XC3S400AN-4FGG400C is grade, not logic or package capacity.
Confirmed Technical and Ordering Data
| Parameter | Confirmed value | Scope / condition |
|---|---|---|
| Logic Family Or Architecture | Spartan-3AN FPGA with in-system flash | nonvolatile configuration integrated with FPGA |
| Logic Capacity | 8,064 logic cells | XC3S400AN resource count |
| Block Ram | 360 Kbits | block RAM capacity |
| Embedded Multipliers | 20 18×18 multipliers | dedicated multiplier count |
| Dcm Count | 4 | digital clock managers |
| In System Flash | 4 Mbits | integrated in-system flash |
| Package Io | 311 user I/O and input-only pins | XC3S400AN in FGG400 |
| Differential Pairs | 142 | maximum differential pairs in FGG400 |
| Speed Grade | -4 | ordering speed grade |
| Temperature Grade | Industrial (I) | ordering suffix |
| Package | FGG400 400-ball FBGA | exact orderable package |
| Lifecycle | Discontinued under AMD XCN23009 | Spartan-3AN family discontinuation |
Engineering Selection Guidance
Do not rewrite C and I suffix parts as identical SKUs: they share resource counts, but the ordering grade and applicable temperature/timing specifications differ.
Integrated 4 Mbit configuration flash differentiates Spartan-3AN from SRAM-only Spartan-3A. Block RAM remains volatile runtime memory.
This industrial orderable is part of the discontinued Spartan-3AN family under XCN23009, so lifecycle risk remains even though the I-grade may fit harsher legacy environments.
Lifecycle and Procurement
AMD Xilinx currently identifies this exact orderable as **Discontinued**. Verified package: FGG400 400-ball FBGA; packing: Legacy tray/package media per original ordering system. Lifecycle and manufacturer status do not state HKEQGOO stock, lead time or final supplier availability.
