LAN9353TI/ML - 3-Port 10/100 Managed Ethernet Switch
料号： LAN9353TI/ML ✓ 量产中LAN9353TI/ML 概述
An Ethernet switch is a semiconductor that connects multiple Ethernet endpoints through internal frame switching. It sits between the physical network and the host processor, then manages traffic arriving from connected devices. A managed switch can provide controlled network operation rather than functioning only as a basic frame-forwarding bridge. The LAN9353TI/ML combines that switching role with a compact surface-mount package suitable for space-constrained embedded products.
The primary electrical and functional characteristics are a 3-port architecture, 10/100-Mbps Ethernet support, managed-switch operation, and an I2C control interface. Its 64-QFN package supports dense PCB layouts while providing a substantial number of power, ground, signal, and exposed-pad connections. The TI/ML ordering form denotes the manufacturer's tape-and-reel production configuration.
Within the LAN9353 family, the LAN9353 and LAN9353i devices are described by Microchip as high-performance, small-footprint, full-featured 3-port managed Ethernet switches. Their integration is intended to reduce external component count and simplify the connection of embedded equipment to 10/100-Mbps Ethernet networks. This makes the family relevant to industrial controllers, connected consumer products, and embedded systems requiring several network ports.
Typical implementation places the switch close to the host interface and Ethernet magnetics, with careful routing of differential Ethernet pairs and controlled return paths for high-speed signals. The I2C interface allows an embedded controller to access device configuration and status functions. Board-level design must also account for the exposed thermal pad, power distribution, crystal or clock requirements, magnetics selection, and the manufacturer-recommended decoupling network.
For a new three-port design, the principal trade-off is integration versus upgrade flexibility. A fixed-function managed switch reduces external circuitry and software overhead, but it is less flexible than a modular network architecture using discrete Ethernet PHYs and a separate switching controller. Confirm the required management features, supported physical-layer options, clocking arrangement, and board-level reference design before releasing production hardware.
This page brings together the manufacturer family description, package information, interface details, sourcing records, practical application guidance, and pin-compatible alternatives identified through Microchip and distributor cross-reference information for faster engineering evaluation.
直接替换替代料： LAN9353TI/ML ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LAN9353TI/ML （相同外形与封装尺寸） ——差异在于 Package, Product Type, Ethernet Speed, Number of Ports, PHY Type.
LAN9353TI/PT
✅ 直接替换联系询价
查看数据手册 →LAN9353T/ML
✅ 直接替换联系询价
查看数据手册 →LAN9353T/PT
✅ 直接替换联系询价
查看数据手册 →LAN9355/ML
✅ 直接替换联系询价
查看数据手册 →LAN9355/PT
✅ 直接替换联系询价
查看数据手册 →LAN9355TI/ML
✅ 直接替换联系询价
查看数据手册 →LAN9353TI/ML 最大额定值与电气特性
| Product Type | 3-port managed Ethernet switch |
| Number of Ethernet Ports | 3 ports |
| Ethernet Speed | 10/100 Mbps |
| Physical Layer | 10/100 Base-T/TX |
| Management | Managed |
| Host Control Interface | I2C |
| 封装 | 64-pin QFN |
| Package Dimensions | 9 x 9 mm |
| Package Type | QFN with exposed pad |
| 安装类型 | Surface mount |
| Shipping Format | Tape and reel |
LAN9353TI/ML qfn with exposed pad 引脚配置指南
LAN9353TI/ML（qfn with exposed pad 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： LAN9353TI/ML.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LAN9353TI/ML 适用于 6 应用s: Industrial Automation Controller, Embedded Network Gateway, Connected Consumer Equipment, IoT Sensor and Gateway Node, Network-Connected Test Equipment, Building and Facility Network Endpoint.
Industrial Automation Controller
The LAN9353TI/ML fits industrial automation controllers that need to connect a processor to multiple 10/100 Ethernet endpoints. Its three managed ports can support a supervisory controller, an operator interface, and a remote I/O or service device without requiring three discrete network-interface blocks. The I2C interface provides a control path for embedded configuration and status handling. In a rugged industrial product, the 64-QFN 9 x 9 mm package helps preserve board area, but the design must provide careful Ethernet return-path routing, robust magnetics, stable supplies, and thermal design for the exposed pad.
推荐
Embedded Network Gateway
The LAN9353TI/ML is appropriate for an embedded gateway that aggregates traffic from local Ethernet devices and forwards selected data to a host processor or another network. Its three 10/100-Mbps ports suit industrial gateways, access points, and edge controllers operating below gigabit speeds. Managed-switch operation can provide controlled forwarding behavior, while I2C allows the host to identify configuration requirements. Layout should preserve differential-pair geometry through the switch and magnetics, minimize loop area, and apply the manufacturer's recommended power and decoupling arrangement.
推荐
Connected Consumer Equipment
The three-port managed Ethernet switch capability supports connected consumer products that expose one embedded Ethernet connection while adding service, update, or accessory ports. The LAN9353TI/ML is application-optimized for consumer designs, according to Microchip, and its compact 64-QFN package helps reduce connector and PCB-space requirements. An I2C-based host processor can supervise port configuration. The system must still allocate board area for the required Ethernet magnetic components and provide clean power delivery, controlled clocking, and compliant isolation when the product interface is exposed to an external cable.
推荐
IoT Sensor and Gateway Node
The LAN9353TI/ML can consolidate several wired IoT nodes into a local Ethernet segment connected to an embedded gateway. Three 10/100 Base-T/TX ports provide enough bandwidth for sensors, service tools, and a management link in many low-rate installations. Managed operation is useful when traffic filtering or status control is required, and I2C gives the host a simple control path. For industrial or outdoor installations, verify environmental limits, surge protection, cable-grounding strategy, and enclosure-related thermal conditions; the switch IC alone does not provide the complete isolation and protection network.
推荐
Network-Connected Test Equipment
The LAN9353TI/ML can provide instrument management and service connectivity in compact test and measurement equipment. Two external ports may connect a control computer and remote service interface while a third port connects the product's internal test bus or peripheral subsystem. The managed 10/100-Mbps architecture supports deterministic local traffic handling, and the I2C interface allows the main controller to monitor or configure the switch. Board implementation should account for test-point access, isolated communications boundaries, magnetics layout, and the thermal load created by the exposed pad under sustained network activity.
推荐
Building and Facility Network Endpoint
The LAN9353TI/ML is suitable for building controllers that aggregate multiple wired Ethernet devices into one embedded platform. Typical endpoints can include room controllers, access-control equipment, lighting gateways, and maintenance computers. Three managed 10/100-Mbps ports reduce the need for separate Ethernet interface circuitry, while I2C permits centralized control. Deployment considerations include environmental qualification, surge and fault protection, separation of communications and power grounds, and Ethernet layout rules. Confirm the exact temperature range and regulatory requirements for the installation environment before production release.
推荐
推荐产品汇总
工程参考数据： LAN9353TI/ML ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LAN9353TI/PT | LAN9353T/ML | LAN9355TI/ML |
|---|---|---|---|---|
| Package | 64-QFN, 9 x 9 mm | 64-QFN, 9 x 9 mm | 64-QFN, 9 x 9 mm | 64-QFN, 9 x 9 mm |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Family | LAN9353 | LAN9353 | LAN9353 | LAN9355 |
| Pin Count | 64 pins | 64 pins | 64 pins | 64 pins |
关键差异点
- Three managed ports in one compact switch IC （对比 LAN9355TI/ML)
- I2C host-control integration （对比 LAN9353T/PT)
- Application-focused 10/100 networking （对比 LAN9353TI/PT)
设计说明
Route each 10/100 Base-T/TX differential pair as a controlled impedance transmission line from the LAN9353TI/ML through the selected magnetic device. Maintain continuous reference planes, avoid plane splits beneath the pairs, minimize vias, and follow the manufacturer layout guidelines for connector and magnetics placement. Keep switching supplies and high-current return paths away from the Ethernet pairs to reduce radiated emissions and susceptibility to common-mode noise.
The 64-QFN package uses an exposed pad for electrical connection and heat spreading. Follow the manufacturer land pattern and thermal-via recommendations, provide uninterrupted ground-plane area beneath the device, and verify junction temperature at the highest expected ambient temperature and network traffic. Estimated thermal performance depends on PCB copper area, via count, airflow, and package dissipation; use those actual inputs rather than assuming that the exposed pad alone guarantees adequate cooling.
Implement the manufacturer's recommended input, output, and internal supply decoupling with low-ESR ceramic capacitors placed close to their associated pins. Keep the switching loop between the device, inductor, and capacitor compact, and provide adequate source and sink current for Ethernet transceivers and attached magnetics. Verify power sequencing, startup behavior, and voltage tolerances across temperature before enabling external connections.
Do not substitute a managed switch solely because the package has 64 pins. Confirm pin names, exposed-pad connections, Ethernet port mapping, management features, clocking, operating-temperature grade, and ordering suffixes in the applicable manufacturer datasheet. The LAN9353TI/ML, LAN9353TI/PT, and LAN9355-family entries share the mechanical footprint, but a footprint match alone does not prove functional interchangeability.
Assign the I2C host bus according to the datasheet's voltage, timing, and addressing requirements. Use the specified pull-up arrangement, keep the bus away from noisy power-conversion nodes, and account for capacitance from routing and connected devices. Ethernet and management signals should have controlled return paths, while reset and clock networks should be kept short and protected from accidental contention during power sequencing.
合规信息
Compliance declarations for the exact LAN9353TI/ML ordering code must be confirmed through current Microchip documentation or a formal supplier declaration.