Microchip's LAN9352/LAN9352i is a high-performance, small-footprint, full-featured 2-port managed Ethernet switch. This device is application-optimized for consumer, embedded and Industrial designs which require a highly integrated, cost effective device with switching functionality, flexibility and ease of integration.
Featuring a small form factor 2-port switch, the LAN9352/9352i supports compact PCB design and with 2 Integrated PHY's .  LAN9352 extends the definition of the LAN9353 by replacing the Port 0 MII/RMII/Turbo MII interface with a full featured Ethernet MAC accessible through a high-performance host bus or SPI/
SQI Interface .The Host MAC incorporates the essential protocol requirements for operating an Ethernet/IEEE 802.3-compliant node and provides an interface between the Host Bus Interface (HBI) and the Ethernet PHYs and Switch Fabric. The device communicates with the microcontroller through an SRAM-like slave interface. The simple, yet highly functional host bus interface provides a glue-less connection to most common 8 or 16-bit microprocessors and microcontrollers as well as 32-bit microprocessors with an 8 or 16-bit external bus. Alternatively, the device can be accessed via SPI/SQI . The Host MAC interfaces with the 10/100 Ethernet PHY’s (Virtual PHY, Port 1 PHY, Port 2 PHY) via an internal SMI (Serial Management Interface) bus .

IEEE 1588-2008 is supported via the integrated IEEE 1588-2008 hardware time stamp unit, which supports end-to-end and peer-to-peer transparent clocks. The LAN9352 complies with the IEEE 802.3 (full/half-duplex 10BASE-T and 100BASE-TX) Ethernet protocol, IEEE 802.3az Energy Efficient Ethernet (EEE) (100Mbps only), and 802.1D/802.1Q network management protocol specifications, enabling compatibility with industry standard Ethernet and Fast Ethernet applications. 100BASE-FX is supported via an external fiber transceiver.

The LAN9352/9352i switch combines all of the functions of a 10/100 system, including the switch fabric, packet buffers, buffer management, MACs, PHY transceivers and optional serial management functions. Both versions of the device comply with IEEE 802.3 10BASE-T and 100BASE-TX Ethernet protocol specifications, enabling compatibility with industry standard Ethernet and Fast Ethernet applications. Supports Fiber Interface through SFP and SFF Physical medium

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Highlights

• IEEE 1588-2008 Hardware Time Stamping Unit
• IEEE 802.3az Energy Efficient Ethernet
• Wake On LAN
• Cable Diagnostics    
•  High-performance, full-featured 2-port switch with per-port IEEE 802.1Q VLAN support (up to 16 VLAN groups)
•  IGMP v1/v2 monitoring for multicast packet filtering
•  Optional EEPROM or external CPU serial management support via an I²C™ interface
• Virtual PHY feature simplifies software development by mimicking multiple switch ports as a single-port PHY
• Integrated 1.2V regulator for a single 3.3V supply
• Supports Fiber Interface through SFP and SFF Physical medium     
• 42 per-port MIB counters for efficient network management
• Industrial temperature (-40° to 85°C) options available (LAN9352i)

 Package options:

• LAN9352: 10x10mm, 0.5mm pitch 72-pin SQFN package 
• LAN9352: 12x12mm, 0.5mm pitch 80-pin TQFP-EP package 

Target Applications

• Cable, Satellite, and IP Set-top Boxes (STBs)
• Digital Televisions (DTVs)
• Digital/Personal Video Recorders (DVRs/PVRs)
• VoIP/Video Phone Systems
• Building Automation
• Security and Surveillance
• Home Gateways/Consumer Audio/Video
• Test/Measurement Equipment
• Industrial Automation and Control