LAN9730-ABZJ - USB 2.0 to 10/100 Ethernet | Microchip
MPN: LAN9730-ABZJ ✓ NakahandaLAN9730-ABZJ Ulas
An Ethernet controller is an interface IC that connects a host or embedded processor to an Ethernet physical layer. In this product, the LAN9730 combines an HSIC USB interface, Ethernet controller, and 10/100 PHY in one package. This integration reduces the number of external components required for USB-to-Ethernet connectivity while preserving support for the broad USB driver ecosystem available for high-speed inter-chip interfaces.
The LAN9730-ABZJ uses USB 2.0 signaling to transfer data between an external USB host and the Ethernet network. Its integrated PHY supports 10BASE-T and 100BASE-TX, while the listed operating range of 0°C to +70°C targets commercial-temperature equipment. The 56-pin QFN-EP, 8 mm by 8 mm construction supports compact embedded and industrial designs requiring a surface-mount Ethernet interface.
Its integrated feature set simplifies board design and firmware support. JTAG provides a dedicated hardware debug connection, USB wake-up allows the system to respond to network-related remote activity, and power-on reset provides a defined initialization point. Programmable LED indication supports link, activity, or speed-status reporting, while low-power mode helps reduce energy consumption when the network function is not required.
Typical deployments include USB-to-Ethernet adapters in embedded Linux systems, network connectivity for set-top boxes and personal video recorders, industrial equipment requiring a compact Ethernet port, USB port replicators, and Ethernet-based test and measurement instruments. The device is particularly suitable when an embedded USB host needs a cost-conscious 10/100 Ethernet connection without using a larger host-side interface.
The main layout consideration is the exposed thermal pad and the high-speed HSIC and Ethernet differential routing. Place the controller close to its HSIC host device, follow the reference design for high-speed trace geometry, provide clean power and ground connections, and route Ethernet pairs according to the manufacturer’s differential-pair layout guidance. Use the manufacturer LAN9730 reference design as the basis for component placement, decoupling, and PHY implementation.
This page combines package, interface, feature, comparison, and design information to support component selection and PCB implementation. It also distinguishes confirmed substitutes from alternatives that require application-specific review, helping engineers avoid treating functionally similar USB-to-Ethernet devices as unconditional drop-in replacements.
Mga alternatibo na pwedeng ilagay na LAN9730-ABZJ — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok LAN9730-ABZJ (parehas na form factor at footprint) — pagkakaiba sa Operating Temperature, Package, Supply Voltage.
LAN9730I-ABZJ-TR
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
LAN9500A-ABZJ
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →LAN9730-ABZJ Mga Spesipikasyon
| Device Type | USB 2.0 to 10/100 Ethernet controller |
| USB Interface | USB 2.0 |
| Host Interface | High-Speed Inter-Chip (HSIC) |
| Ethernet Speed | 10 Mbps and 100 Mbps |
| Ethernet Standards | IEEE 802.3 and IEEE 802.3u |
| Physical Layer | Integrated 10BASE-T and 100BASE-TX PHY |
| Volte ng Pagbibigay | 1.2 V and 3.3 V |
| Maximum Operating Voltage | 3.63 V |
| Minimum Operating Voltage | 2.97 V |
| Temperature na Operasyon | 0°C to +70°C |
| Internal Memory | 28 KB |
| Debug Interface | JTAG |
| Wake-Up Feature | USB wake-up |
| Reset Feature | Power-on reset |
| Status Indication | Programmable LED indication |
| Power Management | Low-power mode |
| Packhaging | 56-pin QFN exposed pad, 8 mm x 8 mm |
| Uri ng Pagpapasok | Surface mount |
| Tindminan RoHS | Compliant |
Gabay sa Pin Configuration ng LAN9730-ABZJ 56-pin qfn exposed pad, 8 mm x 8 mm
Pin configuration para sa LAN9730-ABZJ (56-pin qfn exposed pad, 8 mm x 8 mm package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa LAN9730-ABZJ.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
LAN9730-ABZJ ay nararapat para sa 6 aplikasyons: Embedded Linux USB-to-Ethernet Adapter, Set-Top Box Network Connectivity, Personal Video Recorder Ethernet Port, USB Port Replicator, Industrial Test Instrumentation, USB-to-Ethernet Connectivity Adapter.
Embedded Linux USB-to-Ethernet Adapter
The LAN9730-ABZJ fits an embedded Linux system that exposes a host USB connection to a 10/100 Ethernet network. Its USB 2.0 HSIC interface and integrated 10BASE-T/100BASE-TX PHY avoid a separate Ethernet MAC and physical-layer arrangement on the board. The 56-pin QFN exposed-pad package supports compact designs, while the 28 KB internal memory provides dedicated controller resources. Designers should confirm the exact Linux USB driver, device enumeration, and network-interface behavior for their processor before release. The manufacturer reference design is the preferred starting point for HSIC routing, power decoupling, exposed-pad thermal construction, and Ethernet magnetics integration.
Inirekomenda
Set-Top Box Network Connectivity
The LAN9730-ABZJ provides a practical 10/100 Ethernet connection for a set-top box whose primary processor interface is USB HSIC. The controller supports 10 Mbps and 100 Mbps Ethernet and integrates the 10BASE-T and 100BASE-TX PHY, reducing the external component count needed for network access. Programmable LED indication can support link, activity, or speed reporting on the enclosure. Low-power mode can be useful when the product manages energy according to viewing or standby state. Firmware must configure the PHY, negotiate speed, and integrate the network stack, so host-driver support and the manufacturer reference design should be validated early in the hardware schedule.
Inirekomenda
Personal Video Recorder Ethernet Port
The LAN9730-ABZJ is suitable for adding 10/100 Ethernet connectivity to a personal video recorder or similar multimedia appliance with an available USB host interface. At 100 Mbps, it supports control traffic, local media transfer, and network management without requiring Gigabit Ethernet. The integrated PHY concentrates the interface functions in one 56-pin QFN device, while JTAG assists hardware bring-up and diagnostics. The product must still implement the appropriate network transformer or magnetics, RJ45 interface, Ethernet route, and host-side USB transceiver. Firmware scheduling should test sustained traffic, cable insertion, speed negotiation, and wake-up behavior to verify practical PVR performance.
Inirekomenda
USB Port Replicator
The LAN9730-ABZJ allows a USB port replicator to present an Ethernet connection through a host-side USB 2.0 HSIC link. It integrates a USB-to-10/100 Ethernet controller and PHY in one 56-pin QFN exposed-pad package, making it well suited to compact desktop accessories. The 10BASE-T and 100BASE-TX support covers legacy 100 Mbps networks and standard 10 Mbps fallback operation. Programmable LED indication can provide user-visible link and activity status, while low-power mode can reduce consumption in a managed accessory. Careful HSIC trace matching, Ethernet pair routing, grounding, and exposed-pad heat spreading are essential for reliable field operation.
Inirekomenda
Industrial Test Instrumentation
The LAN9730-ABZJ can add network connectivity to test and measurement equipment requiring 10/100 Ethernet rather than Gigabit performance. The device combines an HSIC host connection with an integrated Ethernet PHY, while JTAG provides a dedicated debug route for board bring-up. Its 0°C to +70°C commercial operating range is suitable for controlled indoor and industrial equipment environments. The final product must account for isolation, grounding, surge protection, and cable-routing requirements at the RJ45 boundary. Those protections are external to the controller, so use the manufacturer Ethernet implementation guidance and validate conducted and radiated emissions before production release.
Inirekomenda
USB-to-Ethernet Connectivity Adapter
The LAN9730-ABZJ supports a dedicated USB-to-Ethernet adapter for embedded equipment that has a USB host port but requires a wired network interface. At 10 Mbps and 100 Mbps, it addresses management, diagnostic, and control networks while integrating the Ethernet PHY into a compact 56-pin QFN package. The board design still needs the appropriate USB host transceiver, Ethernet magnetics, RJ45 connector, and protective components. Programmable LED indication allows the adapter to report link, speed, or activity state, and USB wake-up can support remote network access. Host-side power budgeting, driver installation, automatic network configuration, and cable detection should be verified as a complete user experience.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for LAN9730-ABZJ — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | LAN9730I-ABZJ-TR | LAN9500A-ABZJ |
|---|---|---|---|
| Package | 56-QFN exposed pad, 8 mm x 8 mm | 56-QFN | 56-QFN |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Device Type | USB 2.0 to 10/100 Ethernet controller | USB to 10/100 Ethernet controller | USB 2.0 to 10/100 Ethernet controller |
| Ethernet Speed | 10 Mbps and 100 Mbps | 10 Mbps and 100 Mbps | 10 Mbps and 100 Mbps |
| Host Interface | USB 2.0 HSIC | HSIC | HSIC |
| Supply Voltage | 1.2 V and 3.3 V | 3.3 V | 1.2 V, 2.5 V, and 3.3 V |
Pangunahing mga Pagkakaiba
- Single-chip USB-to-Ethernet integration (kumpara saLAN9500A-ABZJ)
- Integrated debugging and network-control features (kumpara saLAN9730I-ABZJ-TR)
- Direct fit to an established 56-QFN LAN9730 platform (kumpara saLAN9500A-ABZJ)
Talaan ng Disenyo
Use the Microchip LAN9730 reference-design schematic and PCB layout as the baseline. Place the controller and its HSIC host transceiver close enough to maintain the specified HSIC trace geometry, and route the Ethernet differential pairs as controlled-impedance pairs with continuous return paths. Review every signal and exposed-pad connection against the package drawing and pin-description table before releasing artwork.
Design the 1.2 V and 3.3 V rails independently because the LAN9730-ABZJ uses both supplies. Follow the manufacturer recommendations for decoupling, supply sequencing, and exposed-pad connection. If a substitution changes the rail count, as can happen with a single-3.3-V alternative, re-evaluate power sequencing and every affected PCB net rather than assuming the rails are interchangeable.
The 56-pin QFN exposed pad is a thermal and electrical construction feature, not an optional pad. Use the manufacturer land pattern and fill the thermal-via field to reduce junction-to-ambient resistance. Estimated thermal performance depends on the PCB copper area, via arrangement, airflow, and dissipated power; recalculate these values when the exposed-pad pattern or enclosure changes.
Do not treat every USB-to-Ethernet controller as a PCB drop-in replacement. Compare HSIC clock requirements, power rails, reset behavior, wake-up logic, JTAG functions, PHY magnetics, and host-side driver support. The LAN9500A family and LAN9730I are documented 56-QFN alternatives, but cross-reference guidance specifically calls for datasheet review before using them in an existing design.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliance is stated in the LAN9730-ABZJ component listing. No automotive qualification is indicated for the commercial-temperature LAN9730-ABZJ ordering code.
