Blog về công ty Mingjiada Supply Microchip LAN9514 4-Port Hi-Speed USB 2.0 Hub And 10/100 Ethernet Controllers

In the design of embedded systems, smart terminals, industrial peripherals and docking stations, interface control chips offering high integration, low power consumption and high stability are core components that ensure a device’s networking and peripheral expansion capabilities. To assist device manufacturers in simplifying hardware design, reducing R&D costs and enhancing device stability, Mingjiada Electronics has newly added stock to its catalogue, featuring the genuine Microchip LAN9514 USB 2.0 hub and 10/100 Ethernet controller, which provides a one-stop interface expansion and wired networking solution for various embedded networked devices, consumer electronics and industrial equipment.

Integrated ‘two-in-one’ design significantly simplifies hardware architecture

The LAN9514 is a highly integrated, multi-functional control chip launched by Microchip. It innovatively combines a high-speed USB 2.0 hub with a 10/100M auto-negotiating Ethernet controller into a single chip, thereby realising dual-core functionality and completely resolving the pain points associated with traditional solutions—namely, the need for multiple chips, complex circuitry and excessive board space.

The LAN9514 incorporates a complete USB 2.0 upstream PHY and four independent downstream USB 2.0 PHYs, enabling the expansion of four high-speed USB peripheral interfaces. It supports the USB 2.0 high-speed transfer specification with data rates of up to 480 Mbps, whilst remaining compatible with USB 1.1 low-speed devices, thereby meeting a wide range of USB peripheral expansion requirements. It also integrates a standardised 100 Mbps Ethernet MAC and PHY unit, supporting 10/100 Mbps auto-negotiation and full/half-duplex mode switching. This meets the requirements of standard wired network data transmission, device networking and data uploads. A single chip can perform the dual functions of ‘USB expansion and wired networking’, significantly simplifying PCB layout and shortening product development cycles.

Key Specifications and Technical Highlights

The LAN9514 is housed in a 64-pin QFN package (9×9 mm), complies with RoHS standards, and incorporates four core modules: an upstream USB 2.0 PHY, four downstream USB 2.0 PHYs, a 10/100 Ethernet MAC/PHY controller, and an EEPROM controller.

Key Parameters at a Glance:

Upstream Interface: USB 2.0 High-Speed (480 Mbps)

Downstream Ports: 4× USB 2.0 + 1× 10/100 Ethernet

Ethernet Standards: IEEE 802.3 10BASE-T / 802.3u 100BASE-TX

Operating Voltage: 3.3V I/O, internal 1.8V core voltage regulation

Temperature range: Commercial grade 0°C to +70°C; Industrial grade (LAN9514i) -40°C to +85°C

Package: 64-pin QFN, 9×9mm

Three key differentiating technologies are worth noting:

UniClock™ single-crystal oscillator architecture: USB and Ethernet share a single 25MHz crystal, eliminating the need for additional clock components in USB hubs and directly reducing BOM costs.

PHYBoost™ programmable drive strength: Each downstream port transceiver supports four levels of USB signal drive strength adjustment, enabling engineers to optimise signal integrity based on board trace lengths.

Integrated ESD protection: Both the USB and Ethernet PHYs incorporate ±8 kV contact discharge and ±15 kV air discharge ESD protection, eliminating the need for external ESD components.

Powered by High-Performance Capabilities, Suitable for Demanding Conditions Across Multiple Scenarios
Leveraging Microchip’s proven interface control technology, the LAN9514 offers exceptional stability and compatibility, making it suitable for most consumer and industrial applications. The chip features a dedicated EEPROM controller that can store USB descriptors and device MAC addresses via an external 93C46 series EEPROM, supporting both customized device configuration and mass production to meet industrial-scale manufacturing requirements.
In terms of energy efficiency and reliability, the LAN9514 supports the IEEE 802.3az High-Efficiency Ethernet standard and features a network wake-up function. When the device is idle, it automatically enters a low-power sleep mode, effectively reducing overall power consumption and making it suitable for battery-powered smart devices. It also integrates a JTAG boundary-scan interface, supporting board-level functional testing and production debugging, which significantly improves production yield and post-production maintenance efficiency. The LAN9514 is housed in a compact 64-pin QFN package, featuring a small form factor and excellent thermal performance, making it suitable for space-constrained hardware designs such as slim and lightweight terminals, compact embedded motherboards, and embedded industrial control devices.

Typical Application Scenarios
The LAN9514 is designed as a “low-cost, small-form-factor, low-power” USB-to-Ethernet + multi-port USB expansion solution, targeting applications across multiple mature product categories:
Docking Stations and Portable Computing Devices: Laptop docking stations, netbooks, ultra-mobile PCs (UMPCs), and mobile internet devices (MIDs)
Consumer Electronics: Digital TVs (DTVs), Blu-ray players, set-top boxes (STBs), game consoles, portable consumer devices
Office and embedded devices: network printers, various embedded systems
In embedded applications, this chip’s value is particularly evident—it quickly adds wired networking capabilities via the USB interface to devices that originally lacked an Ethernet controller, while also providing four additional USB expansion ports. It is suitable for applications requiring “multiple interfaces, compact size, and wide-temperature operation,” such as industrial gateways, medical terminals, and in-vehicle infotainment systems.

For more information on the [Microchip] LAN9514 USB 2.0 hub and 10/100 Ethernet controller, including product details, technical documentation, or sample pricing inquiries, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.
Tags: LAN9514-JZX, LAN9514-JZ, LAN9514-J, LAN9514