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| PartNumber | EZX557AT4 S LKVZ | EZX557AT S LKW4 | EZX557AT2 S LKVY |
| Description | Ethernet ICs DEVICE CON | Ethernet ICs DEVICE CON | Ethernet ICs DEVICE CON |
| Manufacturer | Intel | Intel | Intel |
| Product Category | Ethernet ICs | Ethernet ICs | Ethernet ICs |
| RoHS | Y | Y | Y |
| Series | X557 | X557 | X557 |
| Product | Ethernet Controllers | Ethernet Controllers | Ethernet Controllers |
| Data Rate | 100 Mb/s, 1 Gb/s, 10 Gb/s | 100 Mb/s, 1 Gb/s, 10 Gb/s | 100 Mb/s, 1 Gb/s, 10 Gb/s |
| Interface Type | SGMII, SPI | SGMII, SPI | SGMII, SPI |
| Operating Supply Voltage | 0.83 V, 1.2 V, 2.1 V, 2.5 V | 0.83 V, 1.2 V, 2.1 V, 2.5 V | 0.83 V, 1.2 V, 2.1 V, 2.5 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 55 C | + 55 C | + 55 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | FCBGA-576 | FCBGA-324 | FCBGA-324 |
| Packaging | Tray | Tray | Reel |
| Brand | Intel | Intel | Intel |
| Product Type | Ethernet ICs | Ethernet ICs | Ethernet ICs |
| Standard | 100BASE-T, 1000BASE-T, 10GBASE-T | 100BASE-T, 1000BASE-T, 10GBASE-T | 100BASE-T, 1000BASE-T, 10GBASE-T |
| Factory Pack Quantity | 1 | 1 | 400 |
| Subcategory | Communication & Networking ICs | Communication & Networking ICs | Communication & Networking ICs |
| Part # Aliases | 941975 | 941979 | 941994 |