| PartNumber | XC3S1000-4FG456C | XC3S1000-4FG320C | XC3S1000-4FG320I |
| Description | FPGA - Field Programmable Gate Array 1000000 SYSTEM GATE 1.2 VOLT FPGA | FPGA - Field Programmable Gate Array | FPGA - Field Programmable Gate Array 1000000 SYSTEM GATE 1.2 VOLT FPGA |
| Manufacturer | Xilinx | Xilinx | Xilinx |
| Product Category | FPGA - Field Programmable Gate Array | FPGA - Field Programmable Gate Array | FPGA - Field Programmable Gate Array |
| Product | Spartan-3 | Spartan-3 | Spartan-3 |
| Number of Logic Elements | 17280 | 17280 | 17280 |
| Number of I/Os | 333 I/O | 221 I/O | 221 I/O |
| Operating Supply Voltage | 1.2 V | 1.2 V | 1.2 V |
| Minimum Operating Temperature | 0 C | 0 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 100 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | FBGA-456 | FBGA-320 | FBGA-320 |
| Series | XC3S1000 | XC3S1000 | XC3S1000 |
| Brand | Xilinx | Xilinx | Xilinx |
| Number of Gates | 1000000 | 1000000 | 1000000 |
| Distributed RAM | 120 kbit | 120 kbit | 120 kbit |
| Embedded Block RAM EBR | 432 kbit | 432 kbit | 432 kbit |
| Maximum Operating Frequency | 280 MHz | 280 MHz | 280 MHz |
| Moisture Sensitive | Yes | - | Yes |
| Product Type | FPGA - Field Programmable Gate Array | FPGA - Field Programmable Gate Array | FPGA - Field Programmable Gate Array |
| Factory Pack Quantity | 60 | 84 | 84 |
| Subcategory | Programmable Logic ICs | Programmable Logic ICs | Programmable Logic ICs |
| Tradename | Spartan | Spartan | Spartan |