LAN9254T-I/JRX 3-Port EtherCAT Controller | Microchip Technology
料号： LAN9254T-I/JRX ✓ 量产中LAN9254T-I/JRX 概述
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.
直接替换替代料： LAN9254T-I/JRX ——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： LAN9254T-I/JRX （相同外形与封装尺寸） ——差异在于 Digital I/O Count, Package, Mounting Type, Ethernet Speed, Device Type.
LAN9254-I/JRX
✅ 直接替换联系询价
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✅ 直接替换 ⚠️ 规格未核验联系询价
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✅ 直接替换 ⚠️ 规格未核验联系询价
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查看数据手册 →LAN9254T-I/JRX 规格参数
| 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 |
| 封装 | 80-TQFP-EP |
| Package Dimensions | 12 x 12 mm |
| 安装类型 | Surface mount |
| Interface Category | Ethernet controller / industrial communication interface |
LAN9254T-I/JRX 12 x 12 mm 引脚配置指南
LAN9254T-I/JRX（12 x 12 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： LAN9254T-I/JRX.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LAN9254T-I/JRX 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： LAN9254T-I/JRX ——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 | 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 |
关键差异点
- Integrates two Ethernet PHYs with the EtherCAT controller （对比 LAN9254-I/JRX)
- Three-port EtherCAT device-controller integration （对比 LAN9254T/JRX)
- Simplified industrial cabling （对比 LAN9254)
设计说明
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.
合规信息
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.
