LAN9313I-NZW

Controllers Overview

The LAN9313I-NZW is a three-port managed Ethernet switch integrating two internal 10/100 PHYs and one MII interface port. It operates on a single 3.3V supply within an industrial temperature range of -40°C to +85°C. The device features a 32K buffer RAM, a 1K entry forwarding table, and supports IEEE 802.1Q VLANs, QoS prioritization, and IGMP monitoring. Management is facilitated via SPI, I2C, or SMI interfaces. It includes an integrated IEEE 1588 Hardware Time Stamp Unit for Precision Time Protocol synchronization.

Controllers Feature Summary

• Integrated IEEE 1588 Hardware Time Stamp Unit with global 64-bit tunable clock
• Virtual PHY feature simplifies software development by mimicking multiple ports as a single PHY
• Supports dynamic QoS queues per port with programmable rate limiting and random early discard
• Serial management capabilities via SPI/I2C slave access or extended SMI access

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 'I' indicates the industrial temperature grade (-40°C to +85°C) compared to commercial variants. Confirm package details match the required footprint, typically 128-XVTQFP. Ensure compatibility with existing EEPROM configurations if utilizing unmanaged boot modes via the internal loader.

Controllers Selection Notes

Select this component when a managed switch solution with hardware timestamping is required for embedded applications. The inclusion of two internal PHYs reduces external component count. Consider the Virtual PHY capability for connecting external MACs without additional PHY hardware. Verify power budget constraints against the 3.3V single-supply requirement.

Controllers Part Context

This part belongs to the LAN9313 family of three-port 10/100 managed Ethernet switches. The 'I' suffix denotes the industrial temperature rating, distinguishing it from commercial grade versions. It serves as a cost-effective solution for integrating switching capabilities into consumer electronics and industrial control systems requiring precise time synchronization.

Controllers Replacement Considerations

LAN9313-NZW (Commercial Temperature Range)

Controllers FAQ

What is the function of the Virtual PHY?

The Virtual PHY allows the switch fabric to connect to an external MAC or PHY via the MII interface, mimicking the behavior of a single-port PHY to simplify software development.

How is the IEEE 1588 time stamping implemented?

It uses a dedicated Hardware Time Stamp Unit with a global 64-bit tunable clock, supporting master/slave modes per port and timestamping on Sync and Delay_req packets.

Can the device operate without serial management?

Yes, it can operate in an unmanaged mode by loading configuration settings from an optional external EEPROM connected via the I2C/Microwire master controller at reset.