LAN9313-NU

Controllers Overview

The LAN9313-NU is a three-port managed Ethernet switch integrating two internal 10/100 PHYs and one MII interface configurable as either a MAC or PHY. It supports IEEE 802.3 standards for 10BASE-T and 100BASE-TX with full/half duplex operation. The device features a 32K buffer RAM, a 1K entry forwarding table, and four dynamic QoS queues per port. Management is supported via SPI, I2C, or SMI interfaces. It includes an integrated IEEE 1588 Hardware Time Stamp Unit for precision timing synchronization.

Controllers Feature Summary

• Integrated Virtual PHY feature simplifies software development by mimicking multiple switch ports as a single port PHY
• Supports VLAN, QoS packet prioritization, rate limiting, and IGMP monitoring functions
• Provides serial management capabilities via SPI, I2C, or SMI protocols
• Includes IEEE 1588 Hardware Time Stamp Unit for master/slave clock synchronization

Controllers Applications

• Cable, satellite, and IP set-top boxes
• Digital televisions and digital video recorders
• VoIP and video phone systems
• Home gateways and industrial automation systems

Controllers Procurement Notes

Verify the specific suffix 'NU' against the manufacturer's official documentation to confirm package type and temperature range. Ensure compatibility with system voltage requirements of 3.3V. Confirm that the selected variant meets the necessary industrial or commercial operating temperature specifications required for the target application environment.

Controllers Selection Notes

Select this component when a compact, low-power solution for embedded network switching is required. Consider the availability of the MII interface for connecting to external MACs or PHYs if additional ports are needed. Evaluate the need for IEEE 1588 support for time-sensitive applications. Ensure the host system can manage the switch via SPI, I2C, or SMI interfaces as per the design constraints.

Controllers Part Context

The LAN9313 series is designed for embedded applications requiring high performance and flexibility. It combines switch fabric, packet buffers, MACs, and PHY transceivers into a single chip. This integration reduces system cost and complexity while maintaining compatibility with industry-standard Ethernet protocols. It is suitable for consumer electronics and industrial automation markets.

Controllers Replacement Considerations

Consult Microchip Technology for current replacement options or updated revisions of the LAN9313 series. Verify pinout and register compatibility before substituting any alternative components. Check for any errata sheets associated with the specific silicon revision to ensure operational equivalence.