Device Overview
Microchip Technology LAN7850T-I/8JX is an exact-order USB 2.0 / HSIC to 10/100/1000 Ethernet bridge supplied in QFN-56. Selection of this exact part is driven primarily by Device Function (USB 2.0 / HSIC to 10/100/1000 Ethernet bridge), Ethernet Speed (10/100/1000 Mbps), Host Interface (USB 2.0 High-Speed with HSIC).
Selection-Critical Data
| Parameter | Confirmed Data | Why It Matters |
|---|---|---|
| Device Function | USB 2.0 / HSIC to 10/100/1000 Ethernet bridge | Defines the device function or architecture that a compatible replacement must preserve before secondary ratings are compared. |
| Ethernet Speed | 10/100/1000 Mbps | Defines Ethernet PHY/link-rate compatibility with the network and host-side interface. |
| Host Interface | USB 2.0 High-Speed with HSIC | Defines the documented control or communication path that must remain compatible with the host and surrounding peripherals. |
| Integrated Mac Phy | 10/100/1000 MAC and PHY | Defines the degree of Ethernet MAC/PHY integration and therefore the external networking components and host interface still required. |
| Otp Memory | 1 Kbyte (configuration memory) | Defines nonvolatile storage capacity and organization that must fit the system’s data or program-storage requirements. |
| Exact Package | QFN-56 | Determines PCB footprint, pinout, mechanical assembly and orderable-variant compatibility. |
| Standards | IEEE 802.3/802.3u/802.3ab/802.3az | Defines a selection-critical engineering characteristic that a compatible substitute must preserve under the stated conditions. |
Logic and Interface Selection Notes
The device function is USB 2.0 / HSIC to 10/100/1000 Ethernet bridge; this defines the device function or architecture that a compatible replacement must preserve before secondary ratings are compared.
10/100/1000 Mbps is the stated ethernet speed value. Defines Ethernet PHY/link-rate compatibility with the network and host-side interface. For host interface, USB 2.0 High-Speed with HSIC is the approved value. Defines the documented control or communication path that must remain compatible with the host and surrounding peripherals.
For exact package, QFN-56 is the approved value. Determines PCB footprint, pinout, mechanical assembly and orderable-variant compatibility.
10/100/1000 MAC and PHY is the stated integrated mac phy value. Defines the degree of Ethernet MAC/PHY integration and therefore the external networking components and host interface still required. The otp memory is 1 Kbyte; this defines nonvolatile storage capacity and organization that must fit the system’s data or program-storage requirements. Technical condition: configuration memory.
IEEE 802.3/802.3u/802.3ab/802.3az is the stated standards value. Defines a selection-critical engineering characteristic that a compatible substitute must preserve under the stated conditions.
