LAN9311I-NZW

Controllers Overview

The LAN9311I-NZW is a two-port managed Ethernet switch integrating IEEE 802.3 compliant 10/100 PHYs, MACs, and a switch fabric with 32K buffer RAM and a 1K entry forwarding table. It features a 16-bit non-PCI host bus interface supporting big, little, and mixed endian modes for embedded CPU connectivity. The device supports VLAN (IEEE 802.1Q), QoS packet prioritization, rate limiting, IGMP monitoring, and IEEE 1588 hardware time stamping. Operating on a single 3.3V supply, it includes power management features such as Wake-on-LAN and Magic Packet detection. The industrial temperature range variant (-40°C to +85°C) is housed in a 128-XVTQFP package.

Controllers Feature Summary

• Integrated Virtual PHY simplifies software development by mimicking multiple switch ports as a single port MAC/PHY
• Supports comprehensive Layer 2 switching functions including VLAN tagging, spanning tree protocol, and multicast filtering
• Provides high-performance asynchronous SRAM-like host bus interface for direct access to system control registers
• Includes IEEE 1588 Hardware Time Stamp Unit with global 64-bit tunable clock for precise timing synchronization

Controllers Applications

• Cable, satellite, and IP set-top boxes
• Digital televisions and digital video recorders
• VoIP and video phone systems
• Home gateways and test/measurement equipment
• Industrial automation systems

Controllers Procurement Notes

Verify the specific suffix 'NZW' against the manufacturer's current product identification system to confirm the industrial temperature grade and RoHS compliance status. Ensure the ordering part number matches the exact pinout and package dimensions required for the PCB layout. Cross-reference the latest datasheet revision to confirm any errata or silicon revisions that may impact integration.

Controllers Selection Notes

Select this component when a managed switch solution with a parallel 16-bit host interface is required for embedded applications. It is suitable for designs needing integrated PHYs without external MII/RMII connections. Consider the Virtual PHY feature if software complexity reduction is a priority. Verify that the host processor can support the necessary address mapping and interrupt handling for the HBI module.

Controllers Part Context

This part belongs to the LAN9311 family of managed Ethernet switches. The 'I' suffix denotes the industrial temperature range (-40°C to +85°C), while the standard 'LAN9311' typically refers to the commercial range. The 'NZW' suffix indicates the specific 128-pin XVTQFP package configuration. This series is designed to replace discrete switch controller and PHY combinations in space-constrained embedded systems.

Controllers Replacement Considerations

Direct pin-to-pin replacements within the same package are limited due to specific interface configurations. Review the LAN9311i (commercial temp) if temperature range differs. For multi-port requirements, consider the LAN9313 family, though interface differences exist. Verify compatibility with existing firmware drivers before substituting.