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KSZ9477STXI

MCHPKSZ9477STXI

Microchip Technology
Ethernet Switch 10/100/1000 Base-T PHY I2C, SPI Interface 128-TQFP-EP (14x14)
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Overview

The KSZ9477STXI is a high-performance, 7-port Gigabit Ethernet switch featuring an integrated non-blocking wire-speed fabric and 10/100/1000 Base-T PHYs. It supports advanced networking features including IEEE 1588v2 PTP for clock synchronization and AVB for time-sensitive audio/video traffic, making it ideal for deterministic industrial and automotive networking.

Why Choose This Part

This switch provides a low-power solution with EtherGreen technology, consuming only 330mA at 1000Mbps and dropping to 10uA in sleep mode. Its support for multiple host interfaces like SGMII and RGMII allows for seamless connection to various high-speed SoCs and processors.

Applications

Industrial Automation Control
Utilizes IEEE 1588v2 Precision Time Protocol (PTP) for synchronized motor control and sensor data acquisition across distributed networks.
Audio Video Bridging (AVB) Systems
Implements IEEE 802.1AS/Qav standards to ensure low-latency, high-reliability streaming for professional and automotive infotainment.
Secure Gateway
Provides robust network security using Access Control Lists (ACL) and IEEE 802.1X port-based authentication.
Managed Ethernet Switches
Acts as the core switching element with flexible management via SPI, I2C, or in-band communication.

Key Specifications

Function Switch
Protocol Ethernet
Interface I2C, SPI
Standards 10/100/1000 Base-T PHY
Package / Case 128-TQFP Exposed Pad
Voltage - Supply 1.8V, 2.5V, 3.3V
Operating Temperature -40degC ~ 85degC
Supplier Device Package 128-TQFP-EP (14x14)

Getting Started

Evaluation can be performed using the EVB-KSZ9477 evaluation board. Configuration is typically handled via the SPI or I2C management bus using the provided Linux drivers or the Microchip Switch Management software.