LAN9254T-I/JRX 3-Port EtherCAT Controller | Microchip Technology
MPN： LAN9254T-I/JRX ✓ 啟用中LAN9254T-I/JRX 概覽
An EtherCAT device controller is a specialized network-interface IC that manages EtherCAT communication between a master and slave devices. In the broader hierarchy, it is an Ethernet controller, an industrial communication interface, a semiconductor, and ultimately a power-management-dependent embedded interface component. The LAN9254 family integrates the EtherCAT processing function and two Ethernet PHYs to support industrial automation, motion-control, robotics, and distributed machine-control designs.
The LAN9254T-I/JRX is identified as a 2/3-port EtherCAT slave controller with 32 digital I/O signals and integrated Ethernet PHYs. Its two integrated PHYs each support a full-duplex 100BASE-TX transceiver, allowing the controller to participate in EtherCAT line and branch topologies. HP Auto-MDIX supports both direct and crossover LAN cables, which simplifies installation and reduces cabling constraints in factory networks.
The 80-TQFP-EP package provides a compact surface-mount footprint with an exposed pad intended for board-level thermal management. Because the controller combines digital communications logic, Ethernet transceiver functions, and programmable I/O resources, careful partitioning of power, ground, clock, differential Ethernet, and digital signal paths is important. Keep high-speed Ethernet traces impedance-controlled, provide the decoupling recommended by the manufacturer, and connect the exposed thermal pad to the appropriate ground and copper system.
Typical applications include EtherCAT slave modules, servo-drive electronics, programmable logic controllers, industrial robot controllers, machine vision interfaces, distributed I/O stations, and embedded automation equipment. The integrated dual-PHY architecture is especially useful when a compact slave device needs multiple Ethernet connections without external Ethernet transceiver packages.
The key design consideration is that LAN9254T-I/JRX is a protocol-specific controller rather than a general-purpose Ethernet MAC. Firmware, an EtherCAT slave stack, hardware timing, PHY characteristics, and the selected MCU or FPGA must therefore align with the intended master and device architecture. Review the manufacturer LAN9254 product page and datasheet for electrical limits, register definitions, reference clock requirements, and the complete exposed-pad land pattern before releasing a PCB.
This product page consolidates the verified package and interface information, distinguishes confirmed LAN9254 family alternatives, and adds application guidance for engineers planning an EtherCAT slave design.
直接替換替代品，適用於 LAN9254T-I/JRX — 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： LAN9254T-I/JRX （相同外形與佔位） — 差異在於 Digital I/O Count, Package, Mounting Type, Ethernet Speed, Device Type.
LAN9254-I/JRX
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查看資料表 →LAN9254T-I/JRX 規格
| Device Type | 3-port EtherCAT device controller |
| EtherCAT Configuration | 2/3-port EtherCAT slave controller |
| Integrated Ethernet PHY Count | 2 PHYs |
| Ethernet Speed | 100 Mbps |
| Ethernet Physical Layer | 100BASE-TX |
| Duplex Mode | Full duplex |
| Auto-MDIX | HP Auto-MDIX supported |
| Digital I/O Count | 32 digital I/O signals |
| Integrated Ethernet Transceivers | 2 full-duplex 100BASE-TX transceivers |
| 封裝 | 80-TQFP-EP |
| Package Dimensions | 12 x 12 mm |
| 安裝類型 | Surface mount |
| Interface Category | Ethernet controller / industrial communication interface |
LAN9254T-I/JRX 12 x 12 mm 腳位配置指南
LAN9254T-I/JRX（12 x 12 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： LAN9254T-I/JRX.
請參閱 資料表 以查看完整腳位配置。
典型應用
LAN9254T-I/JRX 適用於 6 應用s: EtherCAT Slave Controller Module, Servo Drive Electronics, Industrial Robot Controller, PLC and Distributed I/O, Machine Vision Interface, Programmable Automation Controller.
EtherCAT Slave Controller Module
The LAN9254T-I/JRX fits an EtherCAT slave module because it combines a 3-port EtherCAT device controller with two integrated full-duplex 100BASE-TX PHYs. This integration supports compact line or branch topologies without requiring separate Ethernet transceiver devices. The controller provides 32 digital I/O signals for local discrete functions, while 100 Mbps Ethernet operation matches common industrial automation traffic requirements. HP Auto-MDIX also simplifies field cabling by supporting direct and crossover connections. The design must still provide the correct master-clock architecture, decoupling, Ethernet magnetics or PHY-side network interface, and EtherCAT slave firmware before the module can communicate reliably.
推薦
Servo Drive Electronics
The LAN9254T-I/JRX is suitable for servo-drive electronics that require deterministic EtherCAT communication alongside real-time machine-control functions. Two integrated 100BASE-TX PHYs allow the drive controller to participate in daisy-chained EtherCAT networks without separate Ethernet interface components, while the 32 digital I/O signals can support digital status, interlock, or control signaling. The 80-TQFP-EP package helps preserve board area in compact drives. Firmware must map EtherCAT objects to the motor-control architecture, and the layout must separate Ethernet, digital I/O, power, and ground paths to protect timing-sensitive control electronics.
推薦
Industrial Robot Controller
The LAN9254T-I/JRX can support an industrial robot controller that coordinates axes, peripheral equipment, and safety-related I/O over EtherCAT. Its two integrated 100BASE-TX PHYs are useful in line and branch topologies, while the 32 digital I/O signals provide a local interface for discrete sensors and actuators. Full-duplex 100 Mbps Ethernet operation supports common EtherCAT traffic levels, and HP Auto-MDIX reduces cabling complexity during installation. The controller should be paired with a deterministic real-time MCU or FPGA and a validated EtherCAT slave stack. Signal-integrity and thermal design remain critical because motor systems combine high current, fast switching, and low-level communication circuitry.
推薦
PLC and Distributed I/O
The LAN9254T-I/JRX is well suited to PLC and distributed-I/O modules where multiple field devices communicate through EtherCAT. The 3-port controller topology and two integrated PHYs can simplify network branching, and the 32 digital I/O signals offer a direct hardware interface for discrete field channels. Operating at 100 Mbps in full duplex aligns with standard 100BASE-TX EtherCAT links, while HP Auto-MDIX makes installation more tolerant of varied cabling. In a PLC module, use deterministic EtherCAT firmware, isolated network interfaces where required by the equipment architecture, and carefully controlled clock distribution. The exposed pad must be implemented according to the manufacturer land pattern.
推薦
Machine Vision Interface
The LAN9254T-I/JRX fits machine-vision interfaces that need an embedded EtherCAT connection for coordinating inspection equipment with a robot or PLC. The two integrated 100BASE-TX PHYs allow compact connection to EtherCAT line and branch networks, and the 32 digital I/O signals can support triggers, interlocks, status lamps, and discrete sensor inputs. Full-duplex 100 Mbps operation supports standard factory-network traffic, while HP Auto-MDIX simplifies cable installation in changing production cells. Designers should isolate sensitive vision-processing power and data paths from Ethernet transceivers, maintain controlled impedance on differential pairs, and synchronize the EtherCAT controller clock with the imaging subsystem to prevent accumulated timing error.
推薦
Programmable Automation Controller
The LAN9254T-I/JRX can serve as the communications engine in a programmable automation controller that combines EtherCAT motion, I/O, and local decision logic. The integrated dual-PHY architecture reduces external interface count, while 32 digital I/O signals support direct field-device connections. Its 100BASE-TX full-duplex operation provides a standard industrial Ethernet physical layer, and HP Auto-MDIX improves installation flexibility. The component should be used with an EtherCAT slave stack that matches the controller hardware and network master. PCB implementation requires precise Ethernet trace geometry, effective decoupling, a stable clock, and a thermal strategy for the exposed pad. Firmware configuration and electrical qualification must be completed as a single controlled design process.
推薦
推薦產品摘要
工程參考資料，適用於 LAN9254T-I/JRX — 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 | LAN9254-I/JRX | LAN9254T/JRX | LAN9254T/JR | LAN9254T/J | LAN9254 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 80-TQFP-EP (12x12) | 80-TQFP-EP (12x12) | 80-TQFP-EP (12x12) | 80-TQFP-EP (12x12) | 80-TQFP-EP (12x12) | 80-TQFP-EP (12x12) |
| Ordering Designation | LAN9254T-I/JRX | LAN9254-I/JRX | LAN9254T/JRX | LAN9254T/JR | LAN9254T/J | LAN9254 |
主要差異化特點
- Integrates two Ethernet PHYs with the EtherCAT controller (對比LAN9254-I/JRX)
- Three-port EtherCAT device-controller integration (對比LAN9254T/JRX)
- Simplified industrial cabling (對比LAN9254)
設計說明
Implement the Ethernet pairs as controlled-impedance differential routes using the geometry specified in the manufacturer layout guidance. Keep the PHY-related traces short, continuous, and away from switching power nodes and high-current motor or relay paths. Provide the required Ethernet magnetics or network interface components and minimize breakout lengths so the integrated 100BASE-TX transceivers operate consistently across cables and industrial installations.
Partition supplies for the digital controller, Ethernet PHY sections, and external interface circuitry, then follow the manufacturer recommendation for local high-frequency bypass capacitors. Place the shortest decoupling connections directly at the relevant pins, provide adequate bulk capacitance near the IC, and maintain a low-impedance return path. Verify startup, steady-state voltage limits, and clock sequencing against the complete LAN9254 datasheet before production release.
The 80-TQFP-EP exposed pad is part of the thermal and electrical design. Follow the manufacturer land-pattern requirements for pad size, via count, solder mask, and connection to the ground system. Estimate junction temperature from actual switching and EtherCAT activity in the finished system, while leaving copper and airflow margins for the enclosure. Do not rely on the package outline alone as proof that the controller can dissipate the required loss.
Do not treat the EtherCAT controller as a conventional standalone Ethernet MAC. Select a compatible EtherCAT slave stack, reference clock, host processor interface, and firmware configuration, and verify the device identifier and suffix used by the tools. Also avoid assuming that a related LAN9254 order code is electrically identical. Compare the ordering information, temperature grade, packing form, digital I/O configuration, and qualification requirements before approving a substitution.
合規資訊
The device is an industrial EtherCAT controller, but no specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration was identified in the referenced product information.
