| PartNumber | 1894K-40LFT | 1894K-40LF | 1894K-43LFT |
| Description | Ethernet ICs 3.3V 10/100 PHY RMII | Ethernet ICs 3.3V 10/100 PHY RMII | Ethernet ICs 3.3V 10/100 PHY RMII |
| Manufacturer | IDT (Integrated Device Technology) | IDT (Integrated Device Technology) | IDT (Integrated Device Technology) |
| Product Category | Ethernet ICs | Ethernet ICs | Ethernet ICs |
| RoHS | Y | Y | Y |
| Series | 1894KI | 1894-40 | - |
| Product | Physical Layer Transceivers | Physical Layer Transceivers | Physical Layer Transceivers |
| Number of Transceivers | 1 Transceiver | 1 Transceiver | 1 Transceiver |
| Operating Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | VFQFPN-40 | VFQFPN-40 | QFN-32 EP |
| Packaging | Reel | Tray | Reel |
| Height | 0.9 mm | 0.9 mm | - |
| Length | 6 mm | 6 mm | - |
| Width | 6 mm | 6 mm | - |
| Brand | IDT | IDT | IDT |
| Moisture Sensitive | Yes | Yes | - |
| Product Type | Ethernet ICs | Ethernet ICs | Ethernet ICs |
| Factory Pack Quantity | 5000 | 490 | 1000 |
| Subcategory | Communication & Networking ICs | Communication & Networking ICs | Communication & Networking ICs |
| Part # Aliases | 1894-40 ICS1894K-40LFT | 1894-40 ICS1894K-40LF | ICS1894K-43LFT |
| Unit Weight | - | - | 0.002448 oz |