LAN9353I/PT

Controllers Overview

The LAN9353I/PT is a 3-port managed Ethernet switch featuring integrated 10/100 PHYs with HP Auto-MDIX. It operates on a single 3.3V supply via an internal 1.2V regulator, supporting variable voltage I/O from 1.8V to 3.3V. The device includes a 32K buffer RAM and a 512-entry forwarding table. It supports IEEE 1588v2 hardware timestamping, Turbo MII interfaces up to 200Mbps, and Energy Efficient Ethernet (802.3az). Available in a 64-pin TQFP-EP package, it functions within a commercial temperature range of 0°C to 70°C.

Controllers Feature Summary

• Integrated 3-port switch fabric with VLAN support and QoS packet prioritization
• IEEE 1588v2 hardware timestamp unit for precise time synchronization
• Supports Wake-on-LAN and multiple power-down levels for energy management
• Configurable GPIO/LED interface and I2C/SPI serial management

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 'I/PT' corresponds to the industrial or commercial temperature rating and the 64-pin TQFP-EP package as defined in the official datasheet. Confirm RoHS compliance status and ensure the ordering information matches the manufacturer's current product release notes before finalizing procurement.

Controllers Selection Notes

Select this component when a compact 3-port managed switch solution is required with integrated PHYs. Ensure the design supports a single 3.3V power rail if utilizing the internal regulator. Verify that the host system can manage the switch via I2C or SMI interfaces and requires IEEE 1588v2 timing capabilities.

Controllers Part Context

This part belongs to the LAN935x family of managed Ethernet switches from Microchip Technology. It shares architectural similarities with the LAN9352 and LAN9354 but is distinct in its port configuration and interface options. The 'I' suffix typically denotes the operating temperature range, while 'PT' indicates the specific surface-mount package type.

Controllers Replacement Considerations

Publicly confirmed substitutes include the LAN9352TI/ML and LAN9354I/ML. These devices offer similar managed switching features but may differ in port count or package dimensions. Verify register compatibility and pinout alignment before substitution.