LAN9512I-JZX USB 2.0 Hub and 10/100 Ethernet Controller
料号： LAN9512I-JZX ✓ 量产中LAN9512I-JZX 概述
A USB hub controller is an interface IC that coordinates one upstream USB connection with multiple downstream ports while managing USB enumeration and data transfer. An Ethernet controller similarly combines a media-access controller with a physical-layer interface for 10BASE-T and 100BASE-TX networking. The LAN9512I-JZX places both functions within a single package, reducing component count and simplifying the implementation of USB-to-Ethernet adapters, docking stations, embedded systems, and multifunction peripherals.
The integrated architecture supports one USB 2.0 upstream port and two downstream USB 2.0 ports. Its Ethernet section supports 10/100BASE-TX, full- and half-duplex operation, flow control, automatic 32-bit CRC generation and checking, preamble generation and removal, and IEEE 802.3/802.3u compliance as identified in the component documentation. A 3.3 V operating supply and compact 64-QFN construction suit space-constrained embedded equipment.
The LAN9512i architecture is intended to deliver a low-cost, power-efficient USB/Ethernet and multiport USB connectivity solution from a single device. Integrating the USB PHYs, Ethernet PHY, Ethernet controller, TAP controller, and EEPROM controller eliminates the need for several separate interface components. This consolidation can simplify board routing and reduce the number of external connections, although the exposed-pad package still requires careful thermal and layout practices.
Typical uses include USB-to-Ethernet adapters, USB hubs, network-capable docking stations, printers, game consoles, embedded platforms, and desktop or notebook peripherals. The LAN9512i Reference Design provides a practical implementation example, while the manufacturer data sheet describes the internal block architecture and recommended application arrangements.
When designing around the LAN9512I-JZX, follow the manufacturer’s recommended USB, Ethernet, decoupling, clock, and exposed-pad land-pattern guidance. Preserve the 10/100BASE-TX differential-pair geometry, provide clean power and ground connections, and connect the exposed thermal pad to a properly designed ground plane to improve heat dissipation.
This product record combines manufacturer architecture information with package, temperature, interface, and compliance details, then adds practical application guidance and verified replacement information. It helps engineers assess whether a single-controller USB and Ethernet solution can reduce board complexity while retaining the connectivity required by embedded and peripheral equipment.
直接替换替代料： LAN9512I-JZX ——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： LAN9512I-JZX （相同外形与封装尺寸） ——差异在于 Package, Downstream USB Ports, Ethernet Modes, Ethernet Speed, Lead-Free Status.
LAN9512-JZX
✅ 直接替换联系询价
查看数据手册 →LAN9514I-JZX
✅ 直接替换联系询价
查看数据手册 →LAN9512I-JZX 规格参数
| Product Type | USB 2.0 Hub and 10/100 Ethernet Controller |
| 电源电压 | 3.3 V |
| 工作温度 | -40°C to +85°C |
| 封装 | 64-QFN (9 x 9 mm) |
| 引脚数量 | 64 pins |
| 安装类型 | Surface mount |
| USB Standard | Hi-Speed USB 2.0 |
| Upstream USB Ports | 1 port |
| Downstream USB Ports | 2 ports |
| Integrated USB PHYs | 1 upstream and 2 downstream USB 2.0 PHYs |
| Ethernet Speed | 10/100 Mb/s |
| Ethernet Physical Layer | Integrated 10/100 Ethernet PHY |
| Ethernet Controller | Integrated 10/100 Ethernet MAC |
| Ethernet Modes | 10BASE-T and 100BASE-TX |
| Duplex Support | Full-duplex and half-duplex |
| Ethernet Compliance | IEEE 802.3/802.3u |
| Flow Control | Supported |
| CRC Processing | Automatic 32-bit CRC generation and removal |
| Preamble Processing | Automatic preamble generation and removal |
| TAP Controller | Integrated |
| EEPROM Controller | Integrated |
| RoHS Compliance | Compliant |
| Lead-Free Status | Lead-free |
| Maximum USB Link Speed | 480 Mb/s |
LAN9512I-JZX 64-qfn (9 x 9 mm) 引脚配置指南
LAN9512I-JZX（64-qfn (9 x 9 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： LAN9512I-JZX.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LAN9512I-JZX 适用于 6 应用s: USB-to-Ethernet Adapters, USB Docking Stations, Embedded Ethernet Gateways, Networked Printers and Peripherals, USB Hubs with Network Access, Industrial Control and Data Acquisition.
USB-to-Ethernet Adapters
The LAN9512I-JZX fits compact USB-to-Ethernet adapters because it combines an upstream USB 2.0 PHY, a 10/100 Ethernet PHY, and the Ethernet controller in one 64-QFN device. The integration reduces the number of separate interface ICs required between the USB host and network connector. Its 3.3 V supply and -40°C to +85°C industrial temperature range also support equipment operating outside typical consumer environments. The final adapter still requires suitable 10/100 Ethernet magnetics, an RJ45 arrangement compliant with the intended interface, validated USB routing, and the external components specified by Microchip’s reference design.
推荐
USB Docking Stations
A USB docking station can use the LAN9512I-JZX to add 10/100 Ethernet connectivity while retaining two downstream USB 2.0 ports in a compact 64-QFN implementation. The single upstream USB PHY links the dock to a host computer, while the two downstream PHYs support attached peripherals and the integrated Ethernet controller provides network access. Because the controller combines a TAP controller and EEPROM controller, the design can be tailored for device identification and configuration. PCB implementation should preserve short high-speed USB paths, controlled Ethernet differential impedance, clean 3.3 V distribution, and an exposed-pad connection to the ground plane.
推荐
Embedded Ethernet Gateways
The LAN9512I-JZX is suitable for embedded gateways that must add both wired Ethernet and USB connectivity to a host processor. Its integrated 10/100 Ethernet MAC and PHY reduce external networking silicon, while the upstream USB interface provides a simple connection to embedded Linux or industrial controllers. The industrial -40°C to +85°C range supports equipment deployed in controlled industrial environments. Design work should include Ethernet magnetics with appropriate isolation and impedance, careful isolation between Ethernet and digital ground paths, validated surge and ESD protection, and a layout that follows the manufacturer’s 64-QFN exposed-pad recommendations.
推荐
Networked Printers and Peripherals
Printers and network-capable peripherals can use the LAN9512I-JZX to implement 10/100 Mb/s Ethernet and USB connectivity in one device. The Ethernet controller provides full- and half-duplex operation, flow control, preamble handling, and automatic 32-bit CRC generation and removal, reducing host software complexity. Two downstream USB 2.0 ports can also support local service connections or external peripherals. The controller must be paired with appropriate Ethernet magnetics and connector circuitry, while USB differential pairs require short, symmetric routing. Component placement and exposed-pad thermal design should follow the manufacturer’s application guidance.
推荐
USB Hubs with Network Access
The LAN9512I-JZX can combine a two-port USB 2.0 hub with a 10/100 Ethernet controller in compact hubs and multifunction adapters. One upstream USB port connects to the host, the two downstream PHYs serve peripherals, and the Ethernet section provides wired network access over the same physical USB link. This integration is valuable where a separate USB-to-Ethernet adapter would be inconvenient or space-constrained. The board must provide correct USB termination and routing, Ethernet magnetics, 3.3 V decoupling, and a stable ground reference, while the exposed pad requires a carefully constructed thermal and return-current path.
推荐
Industrial Control and Data Acquisition
The LAN9512I-JZX can provide wired Ethernet and USB connectivity in industrial control cabinets, data-acquisition equipment, and service interfaces. Its -40°C to +85°C operating range is suitable for many industrial environments, while the integrated 10/100 Ethernet controller supports IEEE 802.3/802.3u operation. A 3.3 V supply and compact 9 x 9 mm QFN package support space-conscious controller boards. Engineers should verify EMC and surge requirements at the connector, use Ethernet isolation suitable for the installation, maintain controlled differential-pair geometry, and provide low-impedance power and ground planes around the exposed pad.
推荐
推荐产品汇总
工程参考数据： LAN9512I-JZX ——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 | LAN9512-JZX | LAN9514I-JZX |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-QFN (9 x 9 mm) | 64-QFN JZX | 64-QFN JZX |
| Temperature-Grade Difference | Industrial grade | Standard temperature grade | Industrial-grade ordering option |
关键差异点
- Industrial temperature capability （对比 LAN9512-JZX)
- Single-chip USB and Ethernet integration （对比 LAN9514I-JZX)
- Industrial-grade connectivity with two downstream USB ports （对比 LAN9512-JZX)
设计说明
Implement the LAN9512I-JZX in accordance with the Microchip Technology LAN9512/LAN9512i data sheet and reference schematic. Keep USB 2.0 differential traces short, length-matched, and routed over a continuous reference plane. Route the Ethernet differential pair as a controlled-impedance pair with minimal stubs and via transitions. Place input, output, and Ethernet magnetics close to their associated connector or PHY interfaces rather than routing long high-speed signals across the PCB.
The 64-QFN package exposes a pad that requires an intentional thermal and electrical connection to the ground plane. Follow the manufacturer’s land pattern and exposed-pad guidance, including the recommended via arrangement. Do not isolate the pad from the ground plane unless the datasheet permits it. Maintain unobstructed copper around the package and avoid placing heat-generating components immediately beside it when the enclosure can raise the internal ambient temperature.
Design the 3.3 V supply path with low-impedance planes and place the required decoupling capacitance at the pins identified in the manufacturer data sheet. Separate noisy switching-converter routing from the Ethernet and USB circuitry where practical, and avoid sharing narrow neckdowns between power domains. Validate startup, current transients, and connector-induced disturbances on the finished board because system-level loading is not represented by the IC operating voltage alone.
Do not treat a shared package name as proof that two controller families are electrically interchangeable. Before replacing LAN9512I-JZX with LAN9512-JZX or reviewing LAN9514I-JZX, compare the manufacturer pin descriptions, USB port configuration, Ethernet PHY behavior, EEPROM interface, TAP functions, strap options, clock requirements, and exposed-pad connection. Also verify the operating-temperature grade against the complete product environment and qualified the revised schematic and layout.
合规信息
The component listing identifies the LAN9512I-JZX as RoHS compliant and lead-free. No definitive REACH, halogen-free, or conflict-minerals declaration was established for the exact ordering code.
