LAN89730AMR-A-V03

Controllers Overview

The LAN89730AMR-A-V03 is a single-chip High-Speed Inter-Chip (HSIC) USB 2.0 to 10/100 Ethernet controller designed for automotive applications. It integrates a Hi-Speed USB 2.0 device controller, a 10/100 Ethernet MAC, and an Ethernet PHY with HP Auto-MDIX support. 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 four USB endpoints, full- and half-duplex Ethernet operation, and multiple low-power modes. The component operates within a temperature range of -40°C to +85°C and is housed in a 56-pin VQFN package.

Controllers Feature Summary

• Integrates a Hi-Speed USB 2.0 device controller with HSIC interface supporting up to 480 Mbps chip-to-chip connectivity.
• Includes a fully compliant 10/100 Ethernet MAC and PHY with auto-negotiation, auto-polarity correction, and HP Auto-MDIX.
• Provides extensive power management capabilities with multiple suspend states and wake-on-LAN events.
• Features an integrated EEPROM controller and IEEE 1149.1 compliant JTAG boundary scan for testing.

Controllers Applications

• Diagnostic interfaces for dealership service bays
• Fast software download interfaces via OBD connectors
• Gateway service interfaces for aftermarket repair shops
• In-vehicle engineering development interfaces
• Vehicle manufacturing test interfaces on production assembly lines

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product identification system to ensure correct silicon revision and packaging configuration. Confirm that the required external components, such as the 25 MHz crystal and EEPROM, are compatible with the design specifications. Check for any applicable errata sheets that may detail operational differences or recommended workarounds for this specific hardware revision before finalizing procurement plans.

Controllers Selection Notes

Select this component when a compact solution is required to bridge USB host systems to Ethernet networks in automotive environments. Ensure the design accommodates the 56-pin VQFN package dimensions and thermal requirements. Verify that the application can utilize the integrated PHY or if an external PHY via MII is preferred. Confirm driver availability for the target operating system, including Windows, Linux, or WinCE, to facilitate software integration.

Controllers Part Context

The LAN89730 series serves as a specialized connectivity solution for automotive diagnostics and manufacturing testing. It replaces discrete USB-to-Ethernet bridge chips by integrating both protocol controllers on a single die. This integration reduces board space and component count, making it suitable for cost-sensitive and space-constrained vehicle electronics. The device is part of Microchip's portfolio aimed at simplifying in-vehicle network access.

Controllers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should consult Microchip Technology directly for potential obsolescence management or alternative component recommendations.