LAN9353I/PT - 3-Port Managed Ethernet Switch | Microchip
料号： LAN9353I/PT ✓ 量产中LAN9353I/PT 概述
A managed Ethernet switch is a network-semiconductor device that connects multiple endpoints through frame-based Ethernet links while providing controlled forwarding behavior, status information, and configuration access. Within the product hierarchy, the LAN9353I/PT is an Ethernet switch controller, an interface IC, and ultimately a semiconductor designed for embedded communications systems. Its integrated PHYs reduce the external component count required for a compact three-port Ethernet node.
The verified product information identifies the LAN9353I/PT as an Ethernet switch with 10/100 Base-T and TX PHY connectivity, an I2C interface, three switch ports, and a 64-TQFP exposed-pad package. The I suffix denotes the industrial-oriented ordering configuration in Microchip's LAN9353 family, while PT identifies the specified package and tray presentation. The verified distributor listing also states a supply-voltage range of 1.8 V to 3.3 V and an operating-temperature range of -40 °C to 85 °C.
Its integration is important in embedded systems because board designers can use one device for multiple Fast Ethernet connections instead of implementing separate Ethernet controllers and external PHY components. The switch controller provides a managed-network architecture rather than simply exposing one host interface. The I2C interface supports connection to a host microcontroller or another control element, while the integrated 10/100 PHYs support copper Ethernet connections. Exact internal block dimensions, register defaults, and detailed timing limits are not included in the supplied verification excerpts.
Typical uses include industrial Ethernet gateways, embedded control systems, consumer networking equipment, set-top boxes, printers, and compact embedded Ethernet interfaces. The 10 mm by 10 mm exposed-pad package is particularly relevant to space-constrained equipment, while the three-port architecture is useful where a device must consolidate several local Fast Ethernet links. A complete design still requires appropriate magnetic isolation or magnetics, connector choices, routing rules, firmware, and an operating system or embedded network stack compatible with managed-switch configuration.
The most important design consideration is PCB implementation. The exposed thermal pad requires a properly designed thermal-via and ground-copper pattern, while the Ethernet differential pairs need controlled impedance and minimized separation from switching sources. Power must remain within the verified 1.8 V to 3.3 V supply range, and the operating environment must remain within -40 °C to 85 °C. Designers should consult the complete manufacturer datasheet and errata before finalizing pin connections, magnetics, register programming, and layout.
This page consolidates verified manufacturer, distributor, pricing, package, interface, and sourcing information while clearly separating unavailable engineering details. It also documents the limited verified drop-in substitution landscape instead of presenting functionally similar Ethernet devices that require a different footprint as drop-in replacements.
直接替换替代料： LAN9353I/PT ——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： LAN9353I/PT （相同外形与封装尺寸） ——差异在于 Ethernet Speed, Host Interface, Number of Ports, Package, Product Type.
LAN9353/PT
✅ 直接替换联系询价
查看数据手册 →LAN9353I/PT 最大额定值与电气特性
| Product Type | Managed Ethernet switch controller |
| Number of Ports | 3 ports |
| Ethernet Speed | 10/100 Base-T |
| Integrated PHY | 10/100 Base-T/TX PHY |
| Host Interface | I2C |
| Supply Voltage Range | 1.8 V to 3.3 V |
| 工作温度范围 | -40 °C to +85 °C |
| 封装 | 64-TQFP with exposed pad |
| Package Dimensions | 10 mm × 10 mm |
| 引脚数量 | 64 pins |
| 安装类型 | Surface mount |
| Packaging Type | Tray |
| Application Classification | Consumer, embedded, and industrial electronic designs |
| Managed Switching | Yes |
LAN9353I/PT 10 mm × 10 mm 引脚配置指南
LAN9353I/PT（10 mm × 10 mm 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： LAN9353I/PT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LAN9353I/PT 适用于 6 应用s: Industrial Ethernet Gateway, Embedded Network Control System, Consumer Network Appliance, Printer and Imaging Controller, Industrial Monitoring Terminal, Compact Embedded Ethernet Hub.
Industrial Ethernet Gateway
The LAN9353I/PT fits an industrial Ethernet gateway that must consolidate several local 10/100 Base-T links into a managed switching core. Its three integrated Fast Ethernet ports reduce the external PHY and controller count required for a multiport gateway, while the I2C interface allows an embedded supervisory processor to configure switch behavior. The verified 1.8 V to 3.3 V supply range supports low-voltage digital designs, and the -40 °C to +85 °C specification covers industrial temperature environments. The 10 mm by 10 mm exposed-pad package also helps preserve board area around connectors and magnetics. For production use, the design must include the required Ethernet magnetic interface, controlled-impedance differential routing, correct exposed-pad grounding, and software compatible with the LAN9353 register set.
推荐
Embedded Network Control System
The LAN9353I/PT is suitable for an embedded network-control system requiring three managed Fast Ethernet connections rather than a single host-facing port. A microcontroller can use the verified I2C interface to read status and control the switch, while each 10/100 Base-T port connects to a local controller, sensor gateway, or service interface. Integrating the PHYs into the same package can simplify the PCB compared with a three-PHY design. The managed-switch architecture is useful when deterministic address filtering, port state, or traffic-control functions are needed. The industrial temperature range of -40 °C to +85 °C supports equipment deployed outside controlled office environments. Complete implementation still depends on register initialization, firmware support, proper magnetics, and Ethernet layout practices verified against the manufacturer documentation.
推荐
Consumer Network Appliance
The LAN9353I/PT can serve as the central three-port Ethernet switch in a compact consumer appliance such as a smart home controller, printer, media bridge, or set-top accessory. Its managed 10/100 Base-T/TX capability provides multiple wired network connections without requiring three separate PHY devices, and the I2C interface permits a low-cost host controller to supervise the ports. The 64-TQFP exposed-pad package measures 10 mm by 10 mm, making it suitable for space-conscious consumer products. Using the device within the verified 1.8 V to 3.3 V supply range simplifies integration with contemporary low-voltage processors. Product teams should still validate thermal performance, ESD protection, connector and magnetics selection, and software configuration against their target Ethernet compliance and update requirements.
推荐
Printer and Imaging Controller
The LAN9353I/PT is well matched to a networked printer or imaging controller that needs multiple Fast Ethernet connections for a main host, service interface, and management port. Three managed 10/100 ports consolidate local traffic in one device, and the I2C control path can share configuration access with an embedded printer controller. The integrated PHY architecture reduces board-level component requirements compared with separate Ethernet transceivers. Its verified -40 °C to +85 °C operating range can support industrial printing environments, while its 1.8 V to 3.3 V supply range accommodates low-voltage system rails. Deployment still requires a stable clock and power architecture, Ethernet magnetics with suitable isolation, robust chassis grounding, and software that manages the switch ports correctly under expected traffic and update conditions.
推荐
Industrial Monitoring Terminal
The LAN9353I/PT can support an industrial monitoring terminal that connects a local controller, sensor interface, and remote supervisory network through managed Fast Ethernet ports. Its three-port configuration avoids adding separate Ethernet PHYs when the terminal needs more than one network endpoint. The I2C interface permits the terminal's embedded processor to initialize ports and monitor link status without using a separate management PHY. The verified -40 °C to +85 °C range is appropriate for many factory, building-automation, and utility environments, and the exposed-pad package helps conduct heat away from the switch through the PCB. For field reliability, the implementation must add suitable surge and ESD protection, preserve Ethernet differential-pair geometry, provide verified magnetics, and isolate Ethernet ground paths according to the selected connector architecture.
推荐
Compact Embedded Ethernet Hub
The LAN9353I/PT is appropriate for a compact embedded Ethernet hub joining up to three local Fast Ethernet participants. Integration of the switch controller and 10/100 PHYs into one package supports a space-efficient design, while I2C permits a low-power host to supervise port configuration and status. The device can be used where a simple repeater is insufficient but full-size network infrastructure would be impractical. Its verified 3.3 V maximum operating supply and -40 °C to +85 °C range permit integration into embedded industrial electronics. Engineering validation should include loopback and traffic testing, firmware initialization, thermal testing with the exposed pad, and detailed review of Ethernet magnetics, impedance-controlled traces, surge protection, and grounding to ensure reliable field operation.
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推荐产品汇总
工程参考数据： LAN9353I/PT ——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 | LAN9353/PT |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 64-TQFP-EP (10x10) | 64-TQFP-EP (10x10) |
| Product Type | Managed Ethernet switch controller | Managed Ethernet switch controller |
| Port Count | 3 ports | 3 ports |
| Ethernet Speed | 10/100 Base-T | 10/100 Base-T |
| Host Interface | I2C | I2C |
关键差异点
- Combines three managed Fast Ethernet ports with integrated PHYs （对比 LAN9353/PT)
- Compact 10 mm by 10 mm integrated switching solution （对比 LAN9353/PT)
- Industrial-temperature ordering configuration （对比 LAN9353/PT)
设计说明
Route each 10/100 Base-T interface as a controlled-impedance differential pair with continuous reference planes and minimized vias. Keep the Ethernet pairs away from switching nodes, high-current return paths, crystal-clock traces, and the I2C routing. Place the associated magnetic-device inputs directly at the connector-side network entry where practical, and follow the complete manufacturer layout guidance for trace separation, component placement, and isolation.
The 64-TQFP exposed pad is part of the package's thermal and electrical design. Provide a compact, low-impedance pad connection through thermal vias to an uninterrupted ground plane, then check copper area and via count against the manufacturer's layout recommendations. The supplied excerpts do not provide theta_JA or maximum junction temperature, so a junction-temperature calculation cannot be performed without those verified values.
Operate all supply rails within the verified 1.8 V to 3.3 V range and confirm whether the switch core, PHY, and digital interface use separate rails. Place the datasheet-specified bypass capacitors directly at their associated pins and keep switching-current loops compact. The provided excerpts do not identify individual rail voltages, capacitor values, startup timing, or current limits, so those items must be taken directly from the manufacturer datasheet.
Do not treat a generic three-port Ethernet switch as a drop-in replacement without verifying the complete footprint, exposed-pad connection, pin functions, register behavior, magnetic-interface requirements, and firmware support. In particular, Auto-MDIX may reverse the apparent TX and RX pin relationship during a reversed connection, as noted in the verified manufacturer PDF excerpt. Review the current errata as well as the data sheet before releasing firmware or PCB artwork.
合规信息
The supplied manufacturer and distributor excerpts do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. The verified operating range is -40 °C to +85 °C, but this does not establish automotive qualification.
