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| Part Number | XC3S400-4TQG144C | XC3S400A-4FTG256C | XC3S400-4FTG256C | XC3S400A-4FGG320C | XC3S400AN-4FTG256I |
| Manufacturer | AMD | AMD | AMD | AMD | AMD |
| Series | Spartan®-3 | Spartan®-3A | Spartan®-3 | Spartan®-3A | Spartan®-3AN |
| Package/Case | 144-LQFP | 256-LBGA | 256-LBGA | 320-BGA | 256-LBGA |
| Packaging | Tray | Tray | Tray | Tray | Tray |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Programmable | Not Verified | Not Verified | Not Verified | Not Verified | Not Verified |
| Number of LABs/CLBs | 896 | 896 | 896 | 896 | 896 |
| Number of Logic Elements/Cells | 8064 | 8064 | 8064 | 8064 | 8064 |
| Total RAM Bits | 294912 | 368640 | 294912 | 368640 | 368640 |
| Number of I/O | 97 | 195 | 173 | 251 | 195 |
| Number of Gates | 400000 | 400000 | 400000 | 400000 | 400000 |
| Voltage - Supply | 1.14V ~ 1.26V | 1.14V ~ 1.26V | 1.14V ~ 1.26V | 1.14V ~ 1.26V | 1.14V ~ 1.26V |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature | 0°C ~ 85°C (TJ) | 0°C ~ 85°C (TJ) | 0°C ~ 85°C (TJ) | 0°C ~ 85°C (TJ) | -40°C ~ 100°C (TJ) |
| Grade | - | - | - | - | - |
| Qualification | - | - | - | - | - |
| Supplier Device Package | 144-TQFP (20x20) | 256-FTBGA (17x17) | 256-FTBGA (17x17) | 320-FBGA (19x19) | 256-FTBGA (17x17) |
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