LAN7430-I/Y9X

Controllers Overview

The LAN7430-I/Y9X is a single-chip PCIe to 10/100/1000 Ethernet controller manufactured by Microchip Technology. It integrates a PCIe 3.1 PHY supporting one lane at 2.5 GT/s, a PCIe 3.1 endpoint controller, and a Gigabit Ethernet PHY. The device operates on a single 3.3V supply with internal switching and LDO regulators for core and I/O voltages. It supports IEEE Std 1588-2008 PTP for clock synchronization and advanced power management features including ASPM and EEE. The component is housed in a 48-pin SQFN package measuring 7 x 7 mm and is rated for an industrial temperature range of -40°C to +85°C.

Controllers Feature Summary

• Integrates a Gigabit Ethernet PHY with auto-negotiation, auto-MDIX, and Link MD cable diagnostic capabilities.
• Supports IEEE Std 1588-2008 Precision Time Protocol (PTP) for hardware-based clock synchronization and packet timestamping.
• Features comprehensive power management including PCI-PM, ASPM sub-states, Wake-on-LAN, and Energy Efficient Ethernet (EEE).
• Includes a DMA controller with scatter-gather support and a receive filtering engine with checksum offload and VLAN support.

Controllers Applications

• Automotive infotainment and telematics systems
• PCIe to Gigabit Ethernet adapters and bridges
• Gigabit backplane connectivity
• LTE modems
• Networked cameras

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System to confirm the exact package type and temperature rating. Ensure that the required configuration data, such as MAC address and PCIe settings, is correctly programmed into the external EEPROM or OTP memory prior to system deployment. Confirm compatibility with the target operating system drivers provided by the manufacturer.

Controllers Selection Notes

Select the LAN7430 variant when an integrated Gigabit Ethernet PHY is required for direct copper cabling connections. Choose this model over the LAN7431 if the design does not necessitate an external RGMII or MII interface. Verify that the application environment falls within the specified industrial temperature range and that the 48-pin SQFN package dimensions fit the PCB layout constraints.

Controllers Part Context

This component belongs to the LAN7430/LAN7431 family of low-power PCIe to Gigabit Ethernet controllers. The LAN7430 specifically distinguishes itself by integrating the physical layer transceiver, whereas the LAN7431 provides only the MAC interface for connection to external PHYs. Both share the same PCIe endpoint controller and power management architecture.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official documentation for potential obsolescence notices or recommended alternative components within the same product family.

Controllers FAQ

Does the LAN7430 support 10BASE-T1 automotive standards?

No, the LAN7430 integrates a standard 10/100/1000 Ethernet PHY for twisted pair copper cabling. Support for 100BASE-T1 or HDBaseT requires the LAN7431 variant, which provides an RGMII or MII interface for connecting to external transceivers.

How is the device powered given the single 3.3V supply requirement?

The device utilizes on-chip switching and LDO regulators to generate the necessary core and I/O voltages from the single 3.3V external supply. This eliminates the need for multiple external voltage rails.

What configuration options are available for the MAC address and PCIe settings?

Configuration parameters can be loaded from an external EEPROM via the internal EEPROM controller. Alternatively, for EEPROM-less applications, the device includes 1K Bytes of One-Time Programmable (OTP) memory to preload this configuration data before enumeration.