LAN9250I/PT - 10/100 Industrial Ethernet Controller | Microchip
MPN： LAN9250I/PT ✓ 啟用中LAN9250I/PT 概覽
An Ethernet controller is a semiconductor that manages frame processing and communication between an embedded host and an Ethernet physical layer. The LAN9250 combines these functions as an integrated Ethernet interface IC. Within the product hierarchy, it sits between a general-purpose microcontroller or processor and the physical copper network, providing a hardware interface for 10 Mb/s or 100 Mb/s Ethernet communications.
The device supports optical-fiber connectivity, IEEE 1588 timing support, a low-power operating mode, wake-up capability, power-on reset, and programmable LED indication. Its 1.8 V, 2.5 V, and 3.3 V supply options support embedded designs using multiple logic levels. These features allow the LAN9250I/PT to serve industrial controllers, embedded network equipment, automation systems, and communication products without requiring a separate Ethernet PHY.
The integrated architecture reduces the number of external interface components and provides a unified path for host communication and physical-layer signaling. The SPI/SQI interface supports integration with embedded processors, while I2C provides a separate configuration path. The internal 25 MHz reference clock and derived subsystem clocks form the timing foundation for controller, PHY, and host-interface operations.
Typical uses include industrial Ethernet gateways, factory automation controllers, embedded network servers, serial-to-Ethernet equipment, building automation interfaces, and instrument controllers. The industrial temperature range of -40°C to +85°C supports applications across commercial, industrial, and extended-temperature embedded equipment where compact networking and programmable status indication are required.
PCB design must account for the TQFP exposed pad, high-speed Ethernet layout requirements, suitable magnetic-component selection for copper interfaces, and the device's stated operating supply options. The exposed pad should be connected according to the manufacturer layout guidance, while differential Ethernet traces should be routed as a controlled-impedance pair with minimized disruption and appropriate via symmetry.
This product page consolidates the verified manufacturer and distributor information, distinguishes the industrial-temperature ordering variant, summarizes interface and packaging constraints, and provides practical guidance for evaluating the LAN9250I/PT in embedded Ethernet designs.
直接替換替代品，適用於 LAN9250I/PT — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LAN9250I/PT （相同外形與佔位） — 差異在於 Host Interface, Package, Product Type.
此產品無可直接替換的替代品。
申請替代品LAN9250I/PT 規格
| Product Type | 10/100 Base-T/TX Ethernet Controller with PHY |
| Ethernet Data Rate | 10 Mb/s and 100 Mb/s |
| Host Interface | SPI/SQI |
| Configuration Interface | I2C |
| 封裝 | 64-lead TQFP with exposed pad, 10 x 10 mm |
| 工作溫度範圍 | -40°C to +85°C |
| Supply Voltage Options | 1.8 V, 2.5 V, or 3.3 V |
| Reference Clock | 25 MHz |
| Optical Fiber Support | Supported |
| Timing Support | IEEE 1588 |
| Power Management Feature | Low-power mode |
| Wake-Up Feature | Supported |
| Reset Feature | Power-on reset |
| Status Indication | Programmable LED indication |
| Shipping Media | Tray |
| Standard Tray Quantity | 160 units |
| Country of Origin | Taiwan |
LAN9250I/PT 64-lead tqfp with exposed pad, 10 x 10 mm 腳位配置指南
LAN9250I/PT（64-lead tqfp with exposed pad, 10 x 10 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： LAN9250I/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
LAN9250I/PT 適用於 6 應用s: Industrial Ethernet Gateway, Factory Automation Controller, Building Automation Interface, Embedded Network Server, Serial-to-Ethernet Equipment, Test and Measurement Instrument.
Industrial Ethernet Gateway
The LAN9250I/PT fits an industrial Ethernet gateway because it combines a 10/100 Ethernet controller and Base-T/TX PHY in one 64-lead TQFP exposed-pad package. Its SPI/SQI host interface allows a microcontroller or embedded processor to exchange frames without requiring a separate Ethernet MAC, while I2C supports configuration access. The -40°C to +85°C industrial temperature range is appropriate for gateways deployed near factory equipment. The principal design consideration is a controlled-impedance Ethernet layout with a properly coupled 25 MHz reference clock and manufacturer-compliant exposed-pad grounding.
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Factory Automation Controller
The LAN9250I/PT is appropriate for a factory automation controller that must communicate over 10 Mb/s or 100 Mb/s Ethernet. Its integrated controller and PHY reduce component count and board space, while programmable LED indication can expose link or activity status to maintenance personnel. The industrial -40°C to +85°C range supports extended-temperature factory environments. Designers should still account for conducted-noise immunity, Ethernet isolation or surge protection requirements, and thermal performance of the exposed pad under sustained network activity.
推薦
Building Automation Interface
The LAN9250I/PT can provide the Ethernet connection in a building automation interface that bridges embedded sensors or controllers to a 10/100 network. The SPI/SQI host interface is suitable for a processor-oriented design, and the low-power mode offers a useful power-management option when traffic is intermittent. The -40°C to +85°C range covers many indoor and industrial building-control environments. Implementation should verify the wake-up timing against the system power budget and use the manufacturer guidelines for Ethernet trace geometry and exposed-pad thermal dissipation.
推薦
Embedded Network Server
The LAN9250I/PT is suitable for a compact embedded network server or communications appliance requiring wired 10/100 Ethernet. Integrating the controller and PHY reduces the number of high-speed discrete interfaces required from the host processor and supports a controlled system architecture around SPI/SQI. The device also provides power-on reset, wake-up, and low-power operation, which are useful in embedded network equipment. Engineers should validate protocol stack support, the 25 MHz clock source, boot sequencing, and Ethernet magnetics against their chosen board implementation.
推薦
Serial-to-Ethernet Equipment
The LAN9250I/PT is a practical choice for serial-to-Ethernet equipment because its integrated controller and PHY allow a host processor to bridge a serial interface to a 10/100 network through SPI/SQI. The I2C configuration path provides an additional route for device setup, while programmable LED indication can show network status. For industrial installations, the -40°C to +85°C operating range supports harsher enclosure conditions. The design must preserve Ethernet signal integrity, provide the required clock reference, and implement safe network behavior during firmware upgrade or recovery.
推薦
Test and Measurement Instrument
The LAN9250I/PT can add wired Ethernet connectivity to a test or measurement instrument while keeping the Ethernet implementation compact. The SPI/SQI host interface suits embedded processors, and programmable LED indication can provide a simple user-visible network status. IEEE 1588 support is also identified in the verified feature set, making the device relevant to timing-sensitive network applications. Instrument designers should evaluate trigger accuracy, clock jitter, isolation, grounding, and EMC requirements rather than treating network timing support as a complete precision-displacement measurement system.
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推薦產品摘要
工程參考資料，適用於 LAN9250I/PT — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 64-lead TQFP exposed pad, 10 x 10 mm |
| Brand | Microchip Technology |
| Ethernet Speed | 10 Mb/s and 100 Mb/s |
| Controller and PHY | Integrated single-chip 10/100 controller and Base-T/TX PHY |
| Host Interface | SPI/SQI |
| Configuration Interface | I2C |
| Supply Voltage Options | 1.8 V, 2.5 V, or 3.3 V |
| Operating Temperature Range | -40°C to +85°C |
| Timing Support | IEEE 1588 |
| Verified Unit Price | $3.1734 as of 2026-10-29 |
主要差異化特點
- Controller and PHY integration (對比LAN8720A-CP)
- Host connectivity method (對比LAN8742A-CZ)
- Industrial ordering option (對比LAN9250I/PT base ordering information)
設計說明
Follow the manufacturer TQFP exposed-pad and Ethernet-layout recommendations exactly. The verified package is a 64-lead TQFP with exposed pad at 10 x 10 mm, so the land pattern must match the official drawing rather than a generic 64-pin TQFP footprint. Confirm pin assignments against the current datasheet because the supplied snippets do not contain a complete signal table.
Route the Ethernet differential pair as a controlled-impedance, continuously referenced structure with symmetrical vias and minimal stubs. Provide the specified 25 MHz reference clock with suitable signal integrity, and avoid placing disruptive switching paths parallel to the differential pair. The Ethernet magnetics and connector implementation must also satisfy the interface requirements in the manufacturer datasheet.
Decouple each supported 1.8 V, 2.5 V, or 3.3 V supply according to the current datasheet, and account for the device's activity-dependent consumption when sizing the rail. Use low-power and wake-up modes only after validating their timing against the host boot process. Firmware should use the documented power-on reset sequence rather than relying on uncontrolled supply ramp behavior.
Treat the exposed pad as both an electrical connection and a thermal path. Use the manufacturer-recommended via pattern and copper area, then verify junction temperature in the final enclosure. Actual dissipation depends on supply voltage, operating mode, PHY activity, and ambient temperature; no unsupported dissipation or thermal-resistance value is assumed in this page.
合規資訊
The supplied manufacturer and distributor snippets do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance fields remain unknown rather than being inferred from the industrial-temperature designation.
