LAN7801/9JX

Controllers Overview

The LAN7801/9JX is a SuperSpeed USB 3.1 Gen 1 to 10/100/1000 Ethernet controller manufactured by Microchip Technology. It integrates an Ethernet MAC, USB 3.1 Gen 1 device controller, and PHY within a 64-SQFN (9x9 mm) package. The component supports variable voltage I/O supply ranging from 1.8V to 3.3V and operates within a commercial temperature range of 0°C to +70°C. It provides RGMII output for connection to external Gigabit PHYs.

Controllers Feature Summary

• Integrates a SuperSpeed USB 3.1 Gen 1 device controller with full-speed and high-speed support alongside a 10/100/1000 Ethernet MAC.
• Features an internal Receive Filtering Engine supporting extensive address filtering, VLAN tagging, and wake-up frame patterns.
• Includes One Time Programmable memory for configuration storage in EEPROM-less applications.
• Supports Energy Efficient Ethernet standards and Wake on LAN capabilities.

Controllers Applications

• Automotive Infotainment systems
• Notebook and Tablet Docking Stations
• USB Port Replicators
• Standalone USB to Ethernet Dongles

Controllers Procurement Notes

Verify the specific suffix 'JX' against official documentation to confirm it denotes the standard commercial temperature variant. Ensure compatibility with the required operating voltage range and interface requirements before procurement. Confirm that the 64-SQFN package dimensions align with the target PCB layout constraints.

Controllers Selection Notes

Select this component when a single-chip solution is required to bridge USB 3.1 Gen 1 hosts to Gigabit Ethernet networks. Consider the integrated MAC and filtering engine if minimizing external component count is a priority. Verify that the host system supports the necessary USB protocols and that the application environment falls within the specified commercial temperature limits.

Controllers Part Context

This part belongs to the LAN7801 family of USB to Ethernet controllers. It serves as a connectivity bridge for embedded systems requiring high-speed data transfer between USB hosts and Ethernet networks. The device is designed to replace discrete controller and PHY combinations, simplifying board design and reducing overall system footprint.

Controllers Replacement Considerations

Consult official substitution guides for verified alternatives. Generic cross-model replacements may lack identical pinouts or feature sets. Verify thermal and electrical specifications match the original design requirements before implementing any substitute components.

Controllers FAQ

Does the LAN7801/9JX include an integrated Ethernet PHY?

No, the LAN7801 contains an integrated Ethernet MAC but requires an external Gigabit Ethernet PHY connected via the RGMII interface.

What is the function of the OTP memory in this device?

The One Time Programmable memory allows preloading of USB and Ethernet configuration parameters, enabling operation without an external EEPROM.

Is Wake on LAN supported by this controller?

Yes, the device supports Wake on LAN features including Magic Packet detection and Link Status Change events.