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Microchip KSZ9477STXI-TR


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Brands: Microchip Technology, Inc

Mfr.Part #: KSZ9477STXI-TR

Datasheet: KSZ9477STXI-TR Datasheet (PDF)

Package/Case: TQFP-128

Product Type: Integrated Circuits (ICs)

RoHS Status:

Stock Condition: 2953 pcs, New Original

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KSZ9477STXI-TR General Description

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



    Integrated 7-port 10/100/1000 Layer-2 switch with Gigabit uplink
  • Non-blocking wire-speed Ethernet switching fabric
  • IEEE802.1Qav (AVB) credit based traffic shaper
  • Time aware traffic scheduler with low latency cut- through mode
  • IEEE1588v2 Precision Time Protocol support
  • Time-stamping on all ports
  • Precision GPIO pin timed to the AVB/1588 clock
  • DLR (EtherNet/IP) support
  • HSR (IEC 62439-3) support
  • Full-featured forwarding and filtering control, including Access Control List (ACL) filtering
  • IEEE802.1X support (Port-Based Network Access Control)
  • IEEE802.1Q VLAN support for 128 active VLAN groups and the full range of 4096 VLAN IDs
  • IEEE802.1p/Q tag insertion or removal on a per port basis and support for double-tagging
  • VLAN ID tag/untag options on per port basis
  • IEEE802.3x full-duplex flow control and half-duplex back pressure collision control
  • IGMPv1/v2/v3 snooping for multicast packet filtering
  • IPv6 multicast listener discovery (MLD) snooping
  • QoS/CoS packets prioritization support: 802.1p, DiffServ-based and re-mapping of 802.1p priority field per-port basis on four priority levels
  • IPv4/IPv6 QoS support
  • Programmable rate limiting at ingress and egress ports
  • Broadcast storm protection
  • Four priority queues with dynamic packet mapping for IEEE802.1p, IPv4 DIFFSERV, IPv6 TrafficClass
  • MAC filtering function to filter or forward unknown unicast, multicast and VLAN packets
  • Self-address filtering for implementing ring topologies
    Comprehensive Configuration Register Access
  • High-speed SPI (4-wire, up to 50MHz) interface to access all internal registers
  • I2C Interface to access all registers
  • MII management (MIIM, MDC/MDIO 2 wire) interface to access all PHY registers per IEEE 802.3 specification
  • In-band management to access all registers via any of the seven ports, strap enabled
  • I/O pin strapping facility to set certain register bits from I/O pins at reset time
  • Control registers configurable on-the-fly
    Switch Monitoring Features
  • Port mirroring/monitoring/sniffing: ingress and/or egress traffic to any port or MII/RMII
  • MIB counters for fully-compliant statistics gathering (34 MIB counters per port)
    Low Power Dissipation
  • Full-chip software power-down
  • Energy detect power-down (EDPD)
  • Wake on LAN (WoL) support
Microchip Technology, Inc Inventory


Parameter Value Parameter Value
Manufacturer: Microchip Product Category: Ethernet ICs
RoHS: Y Series: KSZ9477
Product: Ethernet Switches Number of Transceivers: 5 Transceiver
Data Rate: 10 Mb/s, 100 Mb/s, 1000 Mb/s Interface Type: I2C, MII, RGMII, RMII, SGMII, SPI
Operating Supply Voltage: 1.8 V, 2.5 V, 3.3 V Minimum Operating Temperature: - 40 C
Maximum Operating Temperature: + 85 C Mounting Style: SMD/SMT
Package / Case: TQFP-128EP Packaging: Reel
Brand: Microchip Technology Supply Current - Max: 750 mA
Duplex: Full Duplex, Half Duplex Moisture Sensitive: Yes
Product Type: Ethernet ICs Standard: 10BASE-Te, 100BASE-TX, 1000BASE-T
Factory Pack Quantity: 1000 Subcategory: Communication & Networking ICs
Supply Voltage - Max: 3.465 V Supply Voltage - Min: 1.14 V
Tags KSZ9, KSZ Product Status Active
DigiKey Programmable Not Verified Protocol Ethernet
Function Switch Interface I2C, SPI
Standards 10/100/1000 Base-T PHY Voltage - Supply 1.8V, 2.5V, 3.3V
Operating Temperature -40°C ~ 85°C Package / Case 128-TQFP Exposed Pad
Supplier Device Package 128-TQFP-EP (14x14)


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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


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  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

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    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

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Datasheet PDF

Preliminary Specification KSZ9477STXI-TR PDF Download

Key points

  • The KSZ9477STXI-TR chip is a highly integrated networking solution designed for switch applications. It offers 7-port gigabit Ethernet switch with advanced features, including extensive layer 2 and layer 3 functions, VLAN support, and Quality of Service (QoS) capabilities. With its compact size and low power consumption, the chip is an ideal choice for consumer and industrial networking devices.
  • Equivalent

    There is no direct equivalent product for the KSZ9477STXI-TR chip. However, similar alternatives in terms of functionality and features include the KSZ9567XKT-R, KSZ8863MLL-EVAL, and RTL8309SB-CG.
  • Features

    The KSZ9477STXI-TR is a 7-port industrial Ethernet switch with built-in routing for enhanced network performance. It supports Gigabit Ethernet connectivity, offering high-speed data transfer. This switch also features advanced security features, including MAC address filtering and VLAN support, ensuring a secure and stable network environment.
  • Pinout

    The KSZ9477STXI-TR is a 7-port gigabit ethernet switch with a pin count of 128 pins. The pins provide various functions such as data input/output, power supply, clock signals, and control signals necessary for the proper operation of the switch.
  • Manufacturer

    The manufacturer of the KSZ9477STXI-TR is Microchip Technology Inc. It is a semiconductor company that specializes in the production of microcontrollers, analog semiconductors, and memory products.
  • Application Field

    The KSZ9477STXI-TR is an Ethernet switch that is commonly used in industrial and automotive applications. It provides high-performance networking capabilities and supports various network protocols. Some application areas for this switch include industrial automation systems, automotive communication networks, and other embedded networking applications.

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