SJA1105ELY - 5-Port 1Gbps Automotive Ethernet Switch | NXP
MPN： SJA1105ELY ✓ 啟用中SJA1105ELY 概覽
An automotive Ethernet switch is a networking semiconductor that connects electronic control units through standardized Ethernet interfaces and forwards frames between automotive network segments. Within the vehicle electronics hierarchy, the SJA1105ELY belongs to the Ethernet switch class, network interface IC category, and broader automotive embedded-networking ecosystem. Its role is to centralize connections among processors, switches, and physical-layer devices while supporting multiple Ethernet operating modes.
The SJA1105ELY is identified as an AEC-Q100 automotive part, and the verified product information describes it as a five-port AVB automotive Ethernet switch. Its 5 Gbps aggregate switching throughput provides a defined performance envelope for modular ECUs, while independent 10/100/1000 Mbps operation allows mixed-speed network segments. These capabilities make the device relevant to vehicle gateways, infotainment systems, advanced driver-assistance electronics, and other connected automotive ECUs.
According to the NXP datasheet, each of the five ports can be individually configured to operate in MII, RMII, and RGMII modes. This interface flexibility lets an automotive system connect different external controllers and PHY devices without forcing one fixed electrical interface across every port. The part is also associated with the TJA1100 BroadR-Reach PHY as a compatible NXP device named in the manufacturer documentation.
The 159-LFBGA package is intended for compact automotive electronics assemblies and is supplied in tape-and-reel form according to the verified distributor description. Automotive ECU designers should treat the package, ball map, exposed-pad requirements, power delivery, clocking, and high-speed Ethernet layout as a coordinated design problem. The datasheet and PCB design guidance should be consulted for exact pin functions, electrical limits, decoupling, and routing because those details are not available in the supplied web excerpts.
A practical design consideration is to preserve the required high-speed differential routing and provide continuous return paths beneath Ethernet pairs. Although the device supports several interface modes, the correct configuration depends on the connected MCU, switch, or PHY. NXP’s product page and SJA1105 datasheet are the authoritative starting points for firmware, electrical characteristics, and implementation requirements.
This product summary combines verified NXP and distributor information, including switching throughput, supported data rates, package, automotive qualification, and available commercial listings. It is intended to accelerate initial part selection while directing engineers to the manufacturer documentation for complete design validation and PCB implementation.
直接替換替代品，適用於 SJA1105ELY — 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。
此產品無可直接替換的替代品。
申請替代品SJA1105ELY 最大額定值與電氣特性
| Product Type | Five-port AVB automotive Ethernet switch |
| Ethernet Standard | IEEE 802.3-compliant |
| Number of Ports | 5 ports |
| Switching Throughput | 5 Gbps |
| Supported Data Rates | 10 Mbps, 100 Mbps, and 1000 Mbps per port |
| Interface Modes | MII, RMII, and RGMII, individually configurable per port |
| Automotive Network Feature | AVB automotive Ethernet |
| Automotive Qualification | AEC-Q100 |
| 封裝 | 159-pin LFBGA |
| Package Type | Low-profile fine-pitch ball grid array |
| 安裝類型 | Surface mount |
| Shipping Format | Tape and reel |
| Product Category | Ethernet switch / Ethernet interface IC |
| Compatible PHY Reference | NXP TJA1100 BroadR-Reach PHY |
| Switching Configuration | Modular and cost-optimized ECU connectivity |
SJA1105ELY low-profile fine-pitch ball grid array 腳位配置指南
SJA1105ELY（low-profile fine-pitch ball grid array 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： SJA1105ELY.
請參閱 資料表 以查看完整腳位配置。
典型應用
SJA1105ELY 適用於 6 應用s: Vehicle Central Gateway, Automotive Infotainment Ethernet, ADAS ECU Networking, Body and Comfort Module, Vehicle Telematics Control Unit, Modular Automotive ECU Backbone.
Vehicle Central Gateway
The SJA1105ELY fits a vehicle central gateway where several automotive Ethernet domains must be consolidated within one ECU. Its five ports provide independent operation at 10 Mbps, 100 Mbps, or 1000 Mbps, allowing slower legacy nodes and gigabit backbones to share the same switching fabric. The 5 Gbps switching throughput gives the platform a defined capacity target, while MII, RMII, and RGMII options support different processor and PHY connections. The 159-LFBGA package also supports compact surface-mount hardware, but designers should reserve the exact ball layout, power planes, and high-speed return paths required by the complete NXP datasheet.
推薦
Automotive Infotainment Ethernet
In an infotainment or telematics controller, the SJA1105ELY can connect processors, external PHYs, and service nodes without requiring every link to use the same speed. Its independent 10/100/1000 Mbps configuration supports a mixed vehicle network, while five ports provide room for local connectivity inside the ECU. The configurable MII, RMII, and RGMII modes let system architects align each port with the connected controller. Designers must validate signal integrity, grounding, clocking, and automotive EMC requirements against the official NXP documentation before releasing the PCB layout.
推薦
ADAS ECU Networking
The SJA1105ELY is suitable for an ADAS electronic control unit that needs several deterministic local Ethernet connections for sensors, a processor, and an external network interface. Five independently configurable ports allow the system architect to match link rates to connected functions, and 5 Gbps switching throughput provides a consolidated switching capacity for traffic inside the ECU. The device’s AEC-Q100 identification is relevant to automotive qualification planning, but it does not replace system-level safety, environmental, or reliability validation. Exact power domains, timing constraints, and package escape routing remain subject to the manufacturer datasheet.
推薦
Body and Comfort Module
A body-control module can use the SJA1105ELY to consolidate distributed automotive Ethernet connections for doors, lighting, climate controls, and seat functions. The five-port arrangement provides multiple local links, while independent 10, 100, and 1000 Mbps operation supports different node classes and legacy migration paths. MII, RMII, or RGMII can be selected per port to match the attached MCU or PHY. Because the package is a fine-pitch 159-LFBGA, the layout must be reviewed carefully for ball access, thermal performance, high-speed differential routing, and automotive manufacturing capability.
推薦
Vehicle Telematics Control Unit
The SJA1105ELY can serve as the Ethernet switching element in a telematics control unit that connects a communications processor, external network interfaces, and local vehicle nodes. Independent port rates support a mix of 10 Mbps, 100 Mbps, and 1000 Mbps links, and the five-port capacity avoids requiring a separate switch for every internal function. Its automotive Ethernet positioning makes it appropriate for connected-vehicle ECUs where modularity and link flexibility matter. Firmware, PHY selection, network topology, and security requirements should be validated with the complete NXP documentation and the vehicle manufacturer’s interface specifications.
推薦
Modular Automotive ECU Backbone
The SJA1105ELY is well suited to modular ECU architectures that need a small number of independently configurable Ethernet ports. Its 5 Gbps switching throughput provides a clear capacity figure for designing internal backbones, while MII, RMII, and RGMII support several generations of host interfaces. The five ports can connect a mixture of automotive PHYs, processors, and switching nodes without forcing all links into one fixed mode. Engineers should use the NXP reference design and SJA1105 datasheet to establish power sequencing, clock topology, termination, PCB stack-up, and production-test requirements.
推薦
推薦產品摘要
工程參考資料，適用於 SJA1105ELY — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | NXP Semiconductors |
| Product Type | Five-port AVB automotive Ethernet switch |
| Port Count | 5 ports |
| Switching Throughput | 5 Gbps |
| Supported Data Rates | 10 Mbps, 100 Mbps, and 1000 Mbps per port |
| Interface Modes | MII, RMII, and RGMII |
| Package | 159-pin LFBGA |
| Automotive Qualification | AEC-Q100 |
| Shipping Format | Tape and reel |
主要差異化特點
- Five-port integration (對比No verified drop-in alternative was identified)
- Mixed-rate support (對比No verified drop-in alternative was identified)
- Interface flexibility (對比No verified drop-in alternative was identified)
設計說明
Treat the 159-LFBGA layout as a high-speed automotive PCB problem rather than a simple IC placement. Use the official NXP package drawing and pin data to define the ball map, power and ground balls, escape routing, and manufacturing rules. Keep Ethernet differential pairs routed with controlled impedance, continuous reference planes, and short return paths; avoid discontinuities beneath high-speed pairs. Validate the final stack-up and via geometry against the manufacturer’s interface and layout requirements.
The SJA1105ELY supports MII, RMII, and RGMII independently per port, so the PCB and system configuration should be planned from the intended external devices rather than from a generic Ethernet layout. Confirm which clocks, data signals, and control signals each mode requires on the selected pins. Keep clock and data topology compatible with the selected mode, and use the NXP datasheet’s timing and layout guidance before placing external PHY or processor connections.
Power integrity is especially important in an automotive ECU containing multiple Ethernet links and multiple high-speed interfaces. Follow the NXP datasheet for the exact supply rails, decoupling values, sequencing requirements, and exposed-pad connection; those values were not included in the supplied excerpts and must not be guessed. Confirm that the PCB delivers adequate current with low noise across the required temperature range and that ground-plane geometry supports the high-speed return currents.
合規資訊
Verified distributor information identifies the SJA1105ELY as AEC-Q100 automotive qualified. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not supplied and therefore remain unknown.
