Device Overview
LAN9500AI-ABZJ-TR is a Microchip Technology USB 2.0 to 10/100 Ethernet bridge/controller in a QFN-56 package. The main engineering checks for this variant are Device Function (USB 2.0 to 10/100 Ethernet bridge/controller), Ethernet Speed (10/100 Mbps), Host Interface (USB 2.0 High-Speed).
Selection-Critical Data
| Parameter | Confirmed Data | Why It Matters |
|---|---|---|
| Device Function | USB 2.0 to 10/100 Ethernet bridge/controller | Defines the device function or architecture that a compatible replacement must preserve before secondary ratings are compared. |
| Ethernet Speed | 10/100 Mbps | Defines Ethernet PHY/link-rate compatibility with the network and host-side interface. |
| Host Interface | USB 2.0 High-Speed | Defines the documented control or communication path that must remain compatible with the host and surrounding peripherals. |
| Packet Buffer | 30 Kbyte (internal packet buffering) | Defines functional logic or signal-routing behavior; a substitute must preserve the required truth table, direction and control-state behavior. |
| Exact Package | QFN-56 | Determines PCB footprint, pinout, mechanical assembly and orderable-variant compatibility. |
| Integrated Blocks | USB PHY/controller, Ethernet MAC/PHY, FIFO and EEPROM controller | Defines a selection-critical engineering characteristic that a compatible substitute must preserve under the stated conditions. |
Logic and Interface Selection Notes
USB 2.0 to 10/100 Ethernet bridge/controller is the stated device function value. Defines the device function or architecture that a compatible replacement must preserve before secondary ratings are compared.
At 10/100 Mbps, the ethernet speed defines Ethernet PHY/link-rate compatibility with the network and host-side interface. The host interface is USB 2.0 High-Speed; this defines the documented control or communication path that must remain compatible with the host and surrounding peripherals.
QFN-56 is the stated exact package value. Determines PCB footprint, pinout, mechanical assembly and orderable-variant compatibility.
Packet Buffer is 30 Kbyte. Defines functional logic or signal-routing behavior; a substitute must preserve the required truth table, direction and control-state behavior. Technical condition: internal packet buffering. For integrated blocks, USB PHY/controller, Ethernet MAC/PHY, FIFO and EEPROM controller is the approved value. Defines a selection-critical engineering characteristic that a compatible substitute must preserve under the stated conditions.
