LAN9352/PT

Controllers Overview

The LAN9352 is a 2-port 10/100 managed Ethernet switch designed for embedded applications. It integrates an Ethernet switch fabric with 32K buffer RAM and a 512-entry forwarding table, supporting IEEE 802.1Q VLANs and QoS prioritization. The device includes two internal 10/100 PHYs with HP Auto-MDIX and supports 10BASE-T and 100BASE-TX standards. Host connectivity is provided via an 8/16-bit indexed or multiplexed bus interface, as well as SPI/Quad SPI. Power management features include Wake on LAN support and Energy Efficient Ethernet compliance (IEEE 802.3az).

Controllers Feature Summary

• Integrated IEEE 1588v2 hardware timestamp unit supporting boundary and transparent clock modes.
• Comprehensive power management capabilities including multiple power-down levels and wake-on-LAN triggers.
• Support for programmable rate limiting, broadcast storm protection, and IGMP monitoring.

Controllers Applications

• Cable, satellite, and IP set-top boxes
• Digital televisions and video recorders
• VoIP and video phone systems
• Home gateways
• Test and measurement equipment

Controllers Procurement Notes

Verify the specific package variant required for the design, either the 72-pin QFN or the 80-pin TQFP-EP. Confirm that the host system supports the selected interface mode, such as the 8/16-bit bus or SPI. Ensure the application environment falls within the specified commercial or industrial temperature ranges defined in the datasheet specifications.

Controllers Selection Notes

Select this component when a managed switch solution with integrated PHYs is needed for space-constrained embedded designs. The choice between the 72-QFN and 80-TQFP-EP packages depends on available PCB real estate and thermal requirements. Verify that the host processor can accommodate the chosen bus interface configuration to ensure proper system integration.

Controllers Part Context

The LAN9352 belongs to Microchip's family of managed Ethernet switches. It shares core switch fabric architecture with other models like the LAN9354 and LAN9355 but differs in port count and host interface options. While similar devices may offer additional ports or different packaging, the LAN9352 specifically targets applications requiring two switched ports with flexible CPU interfacing.

Controllers Replacement Considerations

LAN9352TI/ML

Controllers FAQ

Does the LAN9352 support fiber optic connections?

Yes, the device supports 100BASE-FX operation through the use of an external fiber transceiver connected to the appropriate pins.

What types of host interfaces are supported?

The LAN9352 supports an 8/16-bit indexed register bus, a multiplexed address/data bus, and an SPI/Quad SPI slave controller.

Is the device compliant with energy-saving standards?

Yes, the LAN9352 is compliant with IEEE 802.3az Energy Efficient Ethernet (EEE) standards.