Device Overview
XC3S400AN-4FGG400C is the commercial -4 FGG400 form of the Spartan-3AN XC3S400AN. It combines 8,064 logic cells, 360 Kbits of block RAM, 20 dedicated multipliers and four DCMs with 4 Mbits of integrated in-system flash.
The FGG400 package exposes 311 maximum user I/O and input-only pins and up to 142 differential pairs. Unlike Spartan-3 and Spartan-3A, the AN variant integrates nonvolatile configuration storage, which changes power-up configuration architecture.
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 | Commercial (C) | ordering suffix |
| Package | FGG400 400-ball FBGA | exact orderable package |
| Lifecycle | Discontinued under AMD XCN23009 | Spartan-3AN family discontinuation |
Engineering Selection Guidance
The 4 Mbit in-system flash is configuration-oriented nonvolatile storage and is distinct from the 360 Kbits of volatile block RAM used by implemented logic.
The 311-I/O figure is package-specific for XC3S400AN FGG400 and can be used for pin-budget planning; it should not be transferred to FT256 variants.
AMD discontinued Spartan-3AN commercial/industrial products in XCN23009. Keep the C suffix and FGG400 package exact when sourcing for an existing board.
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.
