LAN9352TI/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip
料号： LAN9352TI/PT ✓ 量产中LAN9352TI/PT 概述
An Ethernet switch is a semiconductor device that connects multiple nodes on a local network and manages frame forwarding between ports. The managed designation indicates that port behavior can be configured rather than operating only as a simple physical-layer repeater. Within the product hierarchy, the LAN9352TI/PT is a two-port managed Ethernet switch with integrated PHYs, a network-interface controller, and configurable general-purpose I/O functions.
Key features include two integrated 10/100 Base-T/TX PHY ports, a 16-bit non-PCI SPI/SQI interface, I2C and SPI host connectivity, and multifunction GPIOs. The single 3.3 V supply architecture simplifies board-level power planning, while the internal 1.2 V regulator supports the core circuitry. A low-cost 25 MHz crystal can be used where the corresponding clocking configuration is supported, helping reduce the external component count.
The LAN9352TI/PT is designed for designs that require two wired-network connections without allocating a discrete PHY and switch controller for each port. Its 80-lead TQFP-EP package exposes the Ethernet magnetics interfaces, power rails, host interface, clocks, management signals, and multifunction GPIOs through a single surface-mount footprint. The exposed pad supports improved thermal dissipation when the board provides adequate copper and thermal via coverage.
Typical applications include industrial control equipment, embedded gateways, factory monitoring systems, building automation controllers, set-top equipment, printers, and other products that connect embedded logic to 10/100 Ethernet networks. Because the device is managed, software can configure operational parameters and monitor port activity through its host-accessible control interfaces.
For PCB design, place the Ethernet magnetics and the device according to the high-speed layout guidance in the manufacturer reference design, route differential pairs as controlled-impedance nets, and provide the decoupling network specified for each supply rail. Treat the exposed pad as a thermal and electrical connection to the ground-plane strategy, and validate final magnetics and isolation-component selections against the target cable length and regulatory requirements.
This page consolidates device specifications, verified sourcing links, application guidance, and a compatibility-focused comparison framework. It also identifies where the 80-lead TQFP-EP package differs from the 72-lead QFN option in the same LAN9352 family, helping designers confirm land-pattern reuse before committing to a PCB revision.
直接替换替代料： LAN9352TI/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： LAN9352TI/PT （相同外形与封装尺寸） ——差异在于 Integrated PHY, Package.
该产品暂无直接替换替代料。
请求替代料LAN9352TI/PT 最大额定值与电气特性
| Product Type | 2-port managed Ethernet switch |
| Number of Ethernet Ports | 2 ports |
| Ethernet Speed | 10/100 Base-T/TX |
| Integrated PHY | 2 integrated 10/100 Base-T/TX PHYs |
| Host Interface | 16-bit non-PCI SPI/SQI |
| Control Interfaces | I2C and SPI |
| General-Purpose I/O | Multifunction GPIOs |
| 电源电压 | 3.3 V |
| Internal Regulator Output | 1.2 V integrated |
| Crystal Option | 25 MHz low-cost crystal supported |
| 封装 | 80-lead TQFP-EP |
| Package Body Size | 12 x 12 mm |
| Family Package Options | 72-pin QFN or 80-pin TQFP-EP |
| 安装类型 | Surface mount |
| Temperature Grade Options | Commercial and industrial temperature ranges |
| Lead-Free Status | Pb-free |
| RoHS 状态 | RoHS compliant |
| Maximum Ethernet Link Rate | 100 Mbps per port |
| Ethernet Media Support | 10/100 Base-T/TX |
LAN9352TI/PT 72-pin qfn or 80-pin tqfp-ep 引脚配置指南
LAN9352TI/PT（72-pin qfn or 80-pin tqfp-ep 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： LAN9352TI/PT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LAN9352TI/PT 适用于 6 应用s: Industrial Ethernet Gateways, Factory Monitoring Equipment, Building Automation Controllers, Embedded Network Printers, Consumer Media and Network Appliances, Robotics and Machine Vision Systems.
Industrial Ethernet Gateways
The LAN9352TI/PT fits industrial gateways that must bridge a local controller to two 10/100 networks. Its two integrated Base-T/TX PHYs eliminate separate PHY components, while the 16-bit non-PCI SPI/SQI interface lets a host processor monitor and configure the switch. Operating from a single 3.3 V rail simplifies system power distribution, and the managed architecture supports port-level software control for diagnostic and traffic-management functions.
推荐
Factory Monitoring Equipment
The LAN9352TI/PT can connect monitoring controllers and programmable equipment to two wired-network segments in a factory. Its integrated 10/100 PHYs provide a compact implementation for data acquisition, condition monitoring, and remote diagnostics. The managed switch functions allow the host software to observe port status, while multifunction GPIOs can support board-level control or status signaling. The single 3.3 V supply architecture reduces the number of board-level rails.
推荐
Building Automation Controllers
The LAN9352TI/PT is appropriate for building-automation controllers that need two Ethernet connections for upstream supervisory networks and local equipment. The managed port architecture permits host software to configure switching behavior and report link conditions, while the SPI/SQI host interface supports integration with an embedded application processor. The 12 x 12 mm TQFP-EP package also leaves room for isolation components and magnetic circuitry in a space-conscious control panel design.
推荐
Embedded Network Printers
The LAN9352TI/PT can serve as the two-port network interface in an embedded printer or imaging appliance. One port may connect to an internal imaging subsystem while the other provides an external network uplink, and the managed switch allows the printer controller to observe connectivity. Its single 3.3 V supply and integrated PHYs reduce board complexity compared with a discrete switch-and-PHY arrangement, supporting compact consumer and office-equipment designs.
推荐
Consumer Media and Network Appliances
The LAN9352TI/PT suits set-top, media, and home-network appliances that require two managed 10/100 ports and a host-accessible switching function. Its 16-bit non-PCI SPI/SQI interface avoids requiring a PCI peripheral bus, allowing connection to a simpler embedded processor. The integrated 1.2 V regulator supports the internal core from a 3.3 V board supply, and the multifunction GPIOs add control signals without requiring separate logic devices.
推荐
Robotics and Machine Vision Systems
The LAN9352TI/PT can provide dual-port networking in robot controllers and machine-vision systems where an embedded processor communicates with cameras, sensors, or service equipment. Two integrated PHYs allow both local high-speed data exchange and plant-network access on one controller board. The managed switching capability supports port monitoring, while the non-PCI SPI/SQI host connection fits processors that lack a conventional PCI peripheral interface.
推荐
推荐产品汇总
工程参考数据： LAN9352TI/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 |
|---|---|
| Package | 80-lead TQFP-EP, 12 x 12 mm |
| Brand | Microchip Technology |
| Ethernet Ports | 2 |
| Ethernet Speed | 10/100 Base-T/TX |
| Host Interface | 16-bit non-PCI SPI/SQI |
| Control Interfaces | I2C and SPI |
| Supply Voltage | Single 3.3 V |
| Internal Regulator | Integrated 1.2 V |
| Multifunction GPIO | Supported |
| RoHS Status | RoHS compliant, Pb-free |
关键差异点
- Two integrated PHYs with managed switching （对比 Discrete switch-and-PHY implementation)
- Processor-friendly host architecture （对比 PCI-based Ethernet interface design)
- Single-rail board power architecture （对比 Multi-rail switch implementation)
- Space-conscious 12 x 12 mm footprint （对比 72-pin QFN LAN9352 package option)
设计说明
Route each Ethernet differential pair as a controlled-impedance transmission line and keep the PHY-to-magnetics section as short as the manufacturer reference layout allows. Maintain the specified pair symmetry, avoid splitting the pair across plane boundaries, and keep switching regulators and high-current paths away from the differential signals. Confirm the final magnetics and isolation-device selection against the required cable length.
The TQFP-EP exposed pad is intended to improve thermal transfer from the device. Bond it to the ground plane with a thermal-via array sized for the device and PCB stack-up, while following the manufacturer pattern for via placement around the pad. Verify junction-temperature margin at the highest ambient temperature and the maximum switching activity expected from the managed Ethernet ports.
Implement separate input, output, and analog-side decoupling exactly as specified in the Microchip LAN9352 manufacturer reference design. Place each capacitor close to its intended supply pin to minimize loop area and high-frequency impedance. Because the device includes an internal 1.2 V regulator, use the documented external connection and bypass arrangement rather than adding an unnecessary second supply rail.
Do not substitute the 72-pin QFN LAN9352 package for the 80-lead TQFP-EP LAN9352TI/PT without redesigning the PCB. Verify the exact ordering code, lead count, exposed-pad connection, and every signal against the package-specific pin table. Also validate the 25 MHz crystal loading and startup conditions before replacing a reference oscillator with a lower-cost crystal source.
合规信息
The device is identified as Pb-free and RoHS compliant. No automotive qualification, REACH status, halogen-free declaration, or conflict-minerals statement is listed for this ordering option.
