LAN9221-ABZJ - 16-Bit 10/100 Ethernet Controller | Microchip
部品番号: LAN9221-ABZJ ✓ 生産中LAN9221-ABZJ 概要
An Ethernet controller is an interface integrated circuit that connects an embedded processor to a physical Ethernet network. The LAN9221 combines medium-access control, physical-layer signaling, data handling, and host-bus interfacing in one device. This places it within the interface-IC hierarchy, where it bridges embedded processing systems and wired network communication while reducing external PHY count and board complexity.
The controller is designed around a high-throughput SRAM-like parallel host interface for 16-bit applications. Its integrated checksum engines can automatically generate and validate Internet or TCP/IP checksums, reducing processor overhead. The integrated 10/100BASE-TX PHY supports connection to a standard RJ45 network through the appropriate magnetics and magnetic-interface circuitry, while variable-voltage I/O allows the host-side interface to operate across a range of supply levels.
Microchip describes the LAN9221 and LAN9221i as full-featured, single-chip 10/100 Ethernet controllers intended for embedded systems where performance, flexibility, ease of integration, and system-cost control are important. The architecture provides a hardware interface for processors that lack native Ethernet support, while checksum offload and integrated PHY functions reduce both firmware burden and external component count.
Typical uses include industrial automation controllers, embedded gateways, serial-to-Ethernet equipment, test and measurement systems, building controls, and network-connected sensors. In these systems, the LAN9221 can sit beside a microcontroller, connect through its parallel host bus, and provide an Ethernet uplink for configuration, monitoring, telemetry, or control traffic. System designers must still provide the correct clock, memory interface, power distribution, magnetic interface, and Ethernet physical-layer implementation.
PCB planning should preserve the manufacturer's recommended high-speed layout and decoupling arrangement because Ethernet signal integrity, clock jitter, controlled-impedance routing, and magnetic-component placement can affect field performance. The 56-QFN footprint also requires a thermal strategy appropriate for the final board environment. Use the pin-description and layout guidance in the manufacturer datasheet before assigning tracks or planning a replacement.
This page consolidates the LAN9221-ABZJ product identity, application context, sourcing workflow, and drop-in replacement assessment. It also distinguishes functional Ethernet alternatives from true same-footprint drop-in parts, helping engineers avoid redesigns caused by interface, package, or feature mismatches.
ドロップイン代替品: LAN9221-ABZJ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
LAN9221I-ABZJ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LAN9221-ABZJ 仕様
| Product Type | 10/100 Ethernet Controller |
| Ethernet Speed | 10/100 Mb/s |
| Host Interface | 16-bit parallel interface |
| Bus Architecture | Non-PCI |
| Integrated PHY | Yes, integrated 10/100BASE-TX PHY |
| Ethernet MAC | Integrated Ethernet MAC |
| I/O Voltage | Variable voltage |
| Checksum Offload | Integrated checksum offload engines |
| パッケージ | 56-QFN, 8 x 8 mm |
| 実装タイプ | Surface Mount |
| Host Processor Compatibility | 16-bit and 32-bit microprocessors and microcontrollers |
| Maximum Link Speed | 100 Mb/s |
LAN9221-ABZJ 56-qfn, 8 x 8 mm ピン配置ガイド
LAN9221-ABZJ (56-qfn, 8 x 8 mm パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: LAN9221-ABZJ.
詳細は データシート をご参照ください。
主な用途
LAN9221-ABZJ の用途: 6 件s: Industrial Automation Gateway, Embedded Network Gateway, Test and Measurement Instrument, Building Control Terminal, Networked Sensor Node, Serial-to-Ethernet Equipment.
Industrial Automation Gateway
The LAN9221-ABZJ fits an industrial gateway because its integrated 10/100BASE-TX PHY and 16-bit parallel host interface provide Ethernet connectivity without a separate MAC or PHY package. The manufacturer describes the device as a glue-less interface for common 16-bit and 32-bit embedded processors. A system implementation places the controller beside the processor, applies the recommended clock and decoupling network, and connects it to an Ethernet magnetic interface. The 10/100 Mb/s link is suitable for supervisory traffic, configuration, and status monitoring, although industrial-temperature requirements may favor LAN9221I-ABZJ.
おすすめ
Embedded Network Gateway
The LAN9221-ABZJ is useful in an embedded gateway that must translate local processor data into 10/100 Mb/s Ethernet traffic. Its parallel slave interface avoids requiring an Ethernet MAC inside the host processor, while the integrated PHY consolidates two major Ethernet functions in one 56-QFN device. Checksum offload can reduce processor work for supported TCP/IP traffic, provided the host driver enables the feature correctly. The board still needs the manufacturer-recommended magnetic interface and controlled-impedance routing, so this device simplifies the design without removing Ethernet layout constraints.
おすすめ
Test and Measurement Instrument
The LAN9221-ABZJ can add wired network access to a test instrument or data-acquisition controller whose host processor lacks a native Ethernet MAC. The 16-bit non-PCI interface supports direct connection to suitable embedded processors, while the integrated PHY handles 10/100BASE-TX signaling. Use it for remote control, status reporting, or logged data transfer rather than bandwidth-heavy workloads. Board planning should isolate sensitive analog or measurement circuitry, provide clean supplies, and follow the datasheet's high-speed and magnetic-interface recommendations.
おすすめ
Building Control Terminal
The LAN9221-ABZJ is appropriate for a wired building-control terminal that reports occupancy, environmental, or equipment status over a 10/100 Mb/s Ethernet segment. Its integrated MAC and PHY reduce the connector count and board area associated with separate Ethernet components, while checksum support can lower network-processing overhead. The controller is placed between the building-control MCU and the network magnetic interface, with local decoupling and controlled routing used to preserve signal integrity. If the terminal must operate in an extended industrial-temperature environment, verify the temperature grade of the selected controller variant.
おすすめ
Networked Sensor Node
The LAN9221-ABZJ can provide wired Ethernet connectivity to a sensor node requiring more bandwidth or cable length than a low-speed fieldbus offers. Its 10/100 Mb/s capability supports continuous telemetry, configuration downloads, and remote diagnostics, while the integrated PHY avoids a discrete Ethernet PHY on the sensor board. The device interfaces to a suitable microcontroller through its parallel bus and connects to standard magnetic-interface circuitry. Design the power supply and return paths carefully because Ethernet magnetics, digital clocks, and sensor circuitry can create distinct current and return-path requirements on the same compact PCB.
おすすめ
Serial-to-Ethernet Equipment
The LAN9221-ABZJ is a practical Ethernet front end for serial-to-Ethernet converters, protocol bridges, and service equipment built around a 16-bit embedded processor. It provides a direct parallel host path to the controller while integrating the MAC and 10/100BASE-TX PHY in a single 56-QFN device. This arrangement reduces external silicon compared with a discrete MAC-plus-PHY implementation and supports standard network management traffic. Firmware must configure the controller, buffers, checksums, and physical link correctly, and the PCB must follow the prescribed clock, decoupling, and Ethernet magnetic-interface layout.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LAN9221-ABZJ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LAN9221I-ABZJ |
|---|---|---|
| Package | 56-QFN (8x8) | 56-QFN (8x8) |
| Brand | Microchip Technology | Microchip Technology |
| Ethernet Speed | 10/100 Mb/s | 10/100 Mb/s |
| Host Interface | 16-bit parallel non-PCI | 16-bit parallel non-PCI |
| Integrated MAC | Yes | Yes |
| Integrated 10/100BASE-TX PHY | Yes | Yes |
| Checksum Offload | Yes | Yes |
| I/O Voltage | Variable voltage | Variable voltage |
| Temperature Designation | Standard grade | Industrial grade |
主な差別化要因
- Integrated Ethernet MAC and PHY reduce external interface silicon （vs LAN9221I-ABZJ)
- Glue-less 16-bit host connectivity targets embedded processors （vs LAN9221I-ABZJ)
- Checksum offload reduces suitable TCP/IP processing overhead （vs LAN9221I-ABZJ)
設計ノート
Follow the manufacturer layout guidance for the integrated 10/100BASE-TX PHY, clock routing, power decoupling, and Ethernet magnetic interface. Keep high-speed traces short, provide continuous return paths, avoid splitting ground planes beneath the PHY section, and use controlled-impedance routing where specified. Position the magnetic components and RJ45 connector according to the reference design because their placement strongly influences radiated and immunity performance.
Separate noisy digital switching currents from sensitive analog or measurement circuits and place the LAN9221-ABZJ's required bypass capacitors close to their specified pins. Confirm every voltage rail against the manufacturer electrical-characteristics table before layout. The integrated PHY does not remove the need for a clean supply; insufficient decoupling can degrade clock quality, link stability, and radiated-emissions behavior.
Do not treat an Ethernet controller with a similar data rate as a mechanical replacement. A valid drop-in candidate must preserve the 56-QFN footprint, 16-bit parallel host interface, supply requirements, reset and clock behavior, and protocol-driver expectations. LAN9221I-ABZJ is the documented close family option, while controllers using SPI, RMII, different pin counts, or different packages can require substantial firmware and PCB changes.
Use the manufacturer's recommended land pattern and exposed-pad connection when planning the 56-QFN assembly. Thermal performance depends on PCB copper area, layer count, airflow, and adjacent heat sources rather than package size alone. Review maximum current, ambient temperature, and junction-temperature limits in the datasheet, and avoid placing temperature-sensitive precision circuits directly beneath the controller unless the thermal analysis supports that placement.
コンプライアンス情報
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements were identified in the cited catalog and manufacturer pages.
