| PartNumber | KSZ9021GN | KSZ9021GQ | KSZ9021GN-TR |
| Description | Ethernet ICs GbE Physical Layer Transceiver with GMII/MII | Ethernet ICs GbE Physical Layer Transceiver with GMII/MII | Ethernet ICs GbE Physical Layer Transceiver with GMII/MII |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | Ethernet ICs | Ethernet ICs | Ethernet ICs |
| RoHS | Y | Y | Y |
| Series | KSZ9021 | KSZ9021 | - |
| Product | Ethernet Transceivers | Ethernet Transceivers | Ethernet Transceivers |
| Number of Transceivers | 1 Transceiver | 1 Transceiver | 1 Transceiver |
| Operating Supply Voltage | 1.14 V to 3.465 V | 1.14 V to 3.465 V | 1.14 V to 3.465 V |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | QFN-64 | PQFP-128 | QFN-64 |
| Packaging | Tray | Tray | Reel |
| Brand | Microchip Technology / Micrel | Microchip Technology / Micrel | Microchip Technology / Micrel |
| Supply Current Max | 555 mA | - | - |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | Ethernet ICs | Ethernet ICs | Ethernet ICs |
| Standard | 10BASE-T, 100BASE-TX, 1000BASE-T | 10BASE-T, 100BASE-TX, 1000BASE-T | - |
| Factory Pack Quantity | 348 | 66 | 1000 |
| Subcategory | Communication & Networking ICs | Communication & Networking ICs | Communication & Networking ICs |
| Supply Voltage Max | 1.26 V, 3.465 V, 2.625 V | 3.465 V | - |
| Supply Voltage Min | 1.14 V, 3.135 V, 2.375 V | 1.14 V | - |
| Unit Weight | 0.007277 oz | - | 0.007277 oz |
| Data Rate | - | 10 Mb/s, 100 Mb/s, 1000 Mb/s | - |
| Interface Type | - | GMII, MII | - |
| Height | - | 2.72 mm | - |
| Length | - | 20 mm | - |
| Width | - | 14 mm | - |
| Duplex | - | Full Duplex, Half Duplex | - |
| Part # Aliases | - | - | KSZ9021GN TR |