LAN9352T/ML

Controllers Overview

The LAN9352T/ML is a 2-port managed Ethernet switch integrating two 10/100 PHYs with HP Auto-MDIX. It features a high-performance switch fabric with 32K buffer RAM and a 512-entry forwarding table. The device supports IEEE 802.1Q VLAN, QoS packet prioritization, rate limiting, IGMP monitoring, and IEEE 1588v2 hardware timestamping. It interfaces with embedded controllers via an 8/16-bit host bus or SPI/Quad SPI. Power management includes Energy Efficient Ethernet (802.3az) and Wake on LAN capabilities. The component operates on a single 3.3V supply using an integrated 1.2V regulator.

Controllers Feature Summary

• Integrated IEEE 1588v2 hardware time stamp unit supporting boundary and transparent clock modes
• Comprehensive power management with multiple power-down levels and Wake on LAN triggers
• Flexible host interface options including indexed register access, multiplexed bus, and SPI/Quad SPI
• Advanced switching features such as port mirroring, dynamic QoS queues, and programmable rate limiting

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 suffix 'T' against the manufacturer's current documentation to confirm temperature range and package variant. Ensure the design accommodates the 72-pin QFN exposed pad grounding requirements. Confirm that the selected host controller supports the required interface mode, whether indexed, multiplexed, or SPI. Check for any applicable errata sheets relevant to the silicon revision being procured.

Controllers Selection Notes

Select this component when a managed switch solution with integrated PHYs is required for embedded applications. It is suitable for designs needing IEEE 1588v2 precision timing or strict QoS enforcement. Consider the available host bus interfaces to match the target processor architecture. Evaluate the power consumption profile if battery operation or low-power standby states are critical system requirements.

Controllers Part Context

The LAN9352 belongs to Microchip's family of managed Ethernet switches designed for cost-sensitive embedded markets. It combines switch fabric, MACs, and PHYs into a single package to reduce board space. The device supports both commercial and industrial temperature ranges, making it versatile for various consumer and industrial networking environments requiring reliable Layer 2 switching.

Controllers Replacement Considerations

LAN9352TI/ML

Controllers FAQ

How does the LAN9352 support fiber connectivity?

The device supports 100BASE-FX connectivity through an external fiber transceiver connected to the appropriate pins.

What is the function of the integrated EEPROM controller?

The I2C master EEPROM controller allows connection to an optional EEPROM for storing static configuration data, which can be automatically loaded at reset.

Can the LAN9352 operate without an external 1.2V regulator?

Yes, the device includes an integrated 3.3V to 1.2V linear regulator, allowing operation from a single 3.3V supply.