LAN9730-ABZJ

Controllers Overview

The LAN9730-ABZJ is a single-chip High-Speed Inter-Chip (HSIC) USB 2.0 to 10/100 Ethernet controller manufactured by Microchip Technology. It integrates a Hi-Speed USB 2.0 device controller, an HSIC interface compliant with Revision 1.0, and a 10/100 Ethernet MAC with an integrated PHY supporting HP Auto-MDIX. The device features 30 kB of internal packet buffering, including 28 kB for the FIFO Controller and 2 kB for the Transaction Layer Interface. It supports full- and half-duplex operation, auto-negotiation, and various power management modes. The component is available in a 56-pin VQFN package and operates within commercial or industrial temperature ranges.

Controllers Feature Summary

• Integrates a Hi-Speed USB 2.0 device controller with four endpoints and an HSIC interface for low-power chip-to-chip connectivity up to 480 Mb/s.
• Includes an IEEE 802.3/802.3u compliant 10/100 Ethernet MAC and PHY with auto-negotiation, automatic polarity correction, and HP Auto-MDIX support.
• Provides extensive power management capabilities with multiple USB suspend states and wake events such as Magic Packet, Wake on LAN, and Link Status Change.
• Features an internal EEPROM controller for loading configuration data and an IEEE 1149.1 compliant TAP controller for JTAG boundary scan testing.

Controllers Applications

• Embedded systems
• Set-top boxes
• Personal Video Recorders (PVRs)
• USB port replicators
• Test instrumentation

Controllers Procurement Notes

Verify the specific suffix ABZJ against the manufacturer's current documentation to confirm package type and environmental rating. Ensure compatibility with the host system's voltage requirements and interface standards before integration.

Controllers Selection Notes

Select this component when a high-performance, low-cost solution for bridging USB to Ethernet is required. Consider the integrated PHY and MAC for simplified designs, or use the external MII interface if HomePNA or HomePlug functionality is needed.

Controllers Part Context

The LAN9730/LAN9730i series serves as a connectivity bridge between USB hosts and Ethernet networks. It targets applications requiring robust network integration in compact form factors, leveraging HSIC for efficient internal communication.

Controllers Replacement Considerations

Consult official Microchip documentation for verified substitute part numbers. Do not assume functional equivalence with other USB-to-Ethernet controllers without verifying pinout, register compatibility, and electrical specifications.

Controllers FAQ

What is the maximum data rate supported by the HSIC interface?

The HSIC interface supports speeds up to 480 Mb/s, compliant with the High-Speed Interchip USB Electrical Specification Revision 1.0.

Does the LAN9730 support external PHY connections?

Yes, an external MII interface allows for the connection of an external Fast Ethernet PHY, supporting HomePNA and HomePlug functionalities.

How many GPIO pins are available in Internal PHY mode?

Up to eleven General Purpose I/O (GPIO) pins are supported when configured for Internal PHY mode.