W5100 - 10/100 Ethernet Controller with TCP/IP | WIZnet
MPN： W5100 ✗ 停產W5100 概覽
An Ethernet controller is an interface IC that connects an embedded processor to a physical network. In the W5100, the MAC, TCP/IP hardware, and 10/100 PHY are integrated into one device, allowing the host MCU or CPU to communicate through SPI while the controller handles Ethernet framing and protocol processing.
The verified distributor listing identifies W5100 as a 10/100 Base-T/TX Ethernet controller with an SPI interface and an 80-LQFP package. The manufacturer datasheet describes the device as a full-featured, single-chip Internet-enabled controller designed for embedded applications where integration stability, performance, area, and system cost control are important.
W5100 is suited to industrial embedded equipment, control systems, instrumentation, building automation, and other Ethernet-connected products. Its integrated architecture can simplify hardware design by combining the Ethernet MAC and PHY with hardware-assisted TCP/IP functions, while the SPI host interface keeps the external processor interface compact.
The 10/100 Ethernet capability makes W5100 appropriate for legacy and cost-sensitive networks operating at 10 or 100 Mbit/s. The exact PHY, electrical, timing, temperature, memory, and SPI operating details should be confirmed directly in the manufacturer datasheet before final schematic, layout, and qualification decisions.
The W5100 is not a power semiconductor, so a safe operating area is not applicable. Proper implementation requires attention to Ethernet magnetics, RJ45 integration, PCB signal integrity, power sequencing, decoupling, and the exact pin assignments shown in the official documentation. This page consolidates the verified product description, distributor package information, datasheet links, and engineering-oriented application guidance.
直接替換替代品，適用於 W5100 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： W5100 （相同外形與佔位） — 差異在於 Host Interface, Package, Ethernet Standard, Product Type.
此產品無可直接替換的替代品。
申請替代品W5100 規格
| Product Type | Single-chip Internet-enabled 10/100 Ethernet controller |
| Ethernet Standard | 10/100 Base-T/TX Ethernet |
| 資料速率 | 10 Mbit/s to 100 Mbit/s |
| Integrated Functions | TCP/IP, Ethernet MAC, and 10/100 PHY |
| Host Interface | SPI |
| 封裝 | 80-LQFP, 10 x 10 mm |
| Manufacturer | WIZnet Co., Ltd. |
| Application Category | Embedded Ethernet systems |
| Network Connectivity | 10/100 Ethernet |
| Controller Architecture | Hardwired TCP/IP controller |
W5100 80-lqfp, 10 x 10 mm 腳位配置指南
W5100（80-lqfp, 10 x 10 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： W5100.
請參閱 資料表 以查看完整腳位配置。
典型應用
W5100 適用於 6 應用s: Industrial Ethernet Control, Building Automation Equipment, Embedded Instrumentation, Networked Sensors and IoT Gateways, Ethernet-Enabled Consumer Devices, Data Acquisition and Remote Monitoring.
Industrial Ethernet Control
W5100 fits embedded industrial controllers that need to connect a local MCU or CPU to a 10/100 Ethernet network. Its integrated TCP/IP, MAC, and PHY functions reduce the network-processing burden on the host processor, while the SPI interface provides a straightforward connection to a microcontroller bus. A system implementation still requires correct power, clock, decoupling, reset, and Ethernet-magnetics design. The controller is especially useful where integration and board area matter, because the verified product description emphasizes stability, performance, area control, and system cost control.
推薦
Building Automation Equipment
W5100 can provide wired Ethernet connectivity for building-automation controllers, room controllers, gateways, and monitoring equipment. A 10/100 Ethernet connection allows embedded equipment to exchange control and status data over an established network without requiring a separate external Ethernet interface. The SPI host connection is useful for small controllers with limited I/O, while the integrated TCP/IP and PHY functions support a more compact implementation. Product developers should verify network timing, cable and magnetics requirements, and firmware behavior against the official WIZnet documentation.
推薦
Embedded Instrumentation
W5100 is appropriate for networked measurement instruments that need to report data through 10/100 Ethernet. The integrated Ethernet controller can offload TCP/IP-related processing from the embedded processor, allowing the instrument to focus on measurement, control, and data storage. The SPI interface supports connection to a host microcontroller, and the 80-LQFP package provides a defined surface-mount implementation for compact instruments. Designers should confirm timing, electrical limits, isolation requirements, and enclosure-related thermal conditions using the manufacturer datasheet.
推薦
Networked Sensors and IoT Gateways
W5100 can serve as the Ethernet side of a compact sensor gateway or IoT bridge. A microcontroller can collect sensor data locally and use the W5100 SPI interface to place that data onto a 10/100 network through hardware-assisted TCP/IP functionality. The dual-rate Ethernet support is useful where endpoint networks may operate at 10 or 100 Mbit/s. For deployment, validate network stack support, connection handling, buffer behavior, reset sequencing, and the complete Ethernet physical-layer implementation before production release.
推薦
Ethernet-Enabled Consumer Devices
W5100 can add wired Ethernet connectivity to embedded consumer devices where a wired network interface is preferred over Wi-Fi. Its single-chip architecture combines the protocol, MAC, and PHY functions, and the SPI interface allows connection to a cost-conscious embedded controller. This can be useful for appliances, media devices, access equipment, and controllers that need network firmware support rather than only a physical Ethernet PHY. Designers must account for the external RJ45 and magnetics implementation, EMC requirements, and the availability of suitable host drivers.
推薦
Data Acquisition and Remote Monitoring
W5100 is suitable for remote monitoring and data-acquisition equipment that must transfer measurements to a LAN-based host. By integrating the 10/100 Ethernet MAC and PHY, it can reduce the amount of Ethernet hardware and firmware required in the embedded design. The host processor communicates through SPI and can use WIZnet's documented controller interface to manage network traffic. The final design should verify buffer requirements, interrupt behavior, packet handling, and system recovery mechanisms under sustained network activity.
推薦
推薦產品摘要
工程參考資料，適用於 W5100 — 比較、設計指引及合規資訊。
選型指南
主要差異化特點
- Integrated single-chip Ethernet architecture (對比Separate Ethernet MAC and PHY implementations)
- SPI host connectivity (對比Ethernet controllers requiring MII or parallel host interfaces)
- Defined embedded package (對比Controllers using different package footprints)
設計說明
Use the WIZnet datasheet as the controlling source for the 80-LQFP, 10 x 10 mm land pattern and pin assignments. Keep the Ethernet differential traces short, controlled-impedance, and isolated from noisy switching nodes. Confirm the required trace spacing, via structure, reference plane, and magnetics layout from the manufacturer application guidance; those values are not included in the supplied verified snippets.
Do not finalize the power tree without checking the W5100 supply-voltage range, current consumption, sequencing, and decoupling recommendations in the official datasheet. Place required bulk and local decoupling close to the relevant pins and keep the Ethernet PHY supply return path compact. The supplied data does not provide voltage or current limits, so they remain [DATA_NEEDED] rather than being estimated.
The SPI host interface must be routed according to the controller's timing and signal-integrity requirements, with attention to clock edge behavior, trace length, grounding, and potential return-current paths. Because the verified snippets do not include SPI maximum frequency or timing tables, do not select a bus speed based on assumptions. Validate the final firmware and timing against the manufacturer specifications.
A similar Ethernet speed does not prove replacement compatibility. W5100 combines TCP/IP, MAC, PHY, SPI, and an 80-LQFP package, so a substitute must be checked for exact pin compatibility, supply requirements, protocol behavior, firmware support, memory access, and Ethernet-magnetics requirements. The supplied cross-reference search returned no validated electronic substitute for W5100.
合規資訊
Compliance information was not present in the supplied verified snippets and must be confirmed from WIZnet product documentation or an authorized distributor.
