LAN9355I/ML - 3-Port Managed Ethernet Switch | Microchip
MPN: LAN9355I/ML ✓ AktifLAN9355I/ML Genel Bakış
An Ethernet switch is a network-interface semiconductor that connects multiple internal endpoints through one integrated switching fabric. The LAN9355 family belongs to the Ethernet interface IC hierarchy, combining Ethernet PHYs, frame handling, management registers, and host-facing interfaces in one device. This integration can reduce the component count and board area required for embedded Ethernet equipment compared with a discrete PHY and external switching arrangement.
The verified manufacturer description identifies the LAN9355 and LAN9355i as full-featured 3-port managed switches designed for space-constrained embedded products. Distributor records classify LAN9355I/ML as an Ethernet switch with 10/100 Base-T/TX PHY and I2C interface. The 88-QFN exposed-pad package provides a substantial thermal and electrical land pattern, while the 12 x 12 mm body supports compact industrial, networking, and communications equipment.
The LAN9355I/ML is appropriate when a system needs multiple 10/100 Ethernet connections managed through a compact serial interface. Its 3-port arrangement can support connections among an embedded host, an external controller, and another Ethernet endpoint. The I2C interface provides a straightforward management path for reading status and configuring relevant device registers, subject to the detailed procedures in the manufacturer datasheet.
Typical uses include embedded gateways, industrial controllers, automation equipment, consumer networking products, USB-to-Ethernet adapters, and compact communications platforms. Because the device supports 10/100 Base-T/TX rather than gigabit Ethernet, it is most appropriate for legacy Fast Ethernet networks, embedded service ports, and industrial subnet segments where 100 Mbit/s performance is sufficient.
Designers should follow the manufacturer reference circuitry for magnetic-interface implementation, layout, clocking, decoupling, and exposed-pad thermal management. Magnetics and connector selection are outside the switching IC but materially affect Ethernet compliance. Confirm the exact pin functions and exposed-pad connection from the official LAN9355 datasheet before layout release.
This product page consolidates the verified manufacturer description, distributor availability, package information, industrial temperature range, and practical design considerations. It also clearly separates confirmed specifications from parameters that require confirmation from the full manufacturer datasheet, helping engineers make evidence-based sourcing decisions.
Drop-in alternatifler için LAN9355I/ML — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller LAN9355I/ML (aynı form faktörü ve ayağa oturma) — farklı olan Package, Switching Architecture.
LAN9355/ML
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Veri Şablonunu Görüntüle →LAN9355I/ML Maksimum Değerlendirmeler & Elektriksel Özellikler
| Device Type | Managed Ethernet switch |
| Number of Ports | 3 ports |
| Ethernet Speed | 10/100 Base-T/TX |
| Integrated Interface | I2C |
| Supply Voltage Range | 1.8 V to 3.3 V |
| İşletim Sıcaklığı Aralığı | -40°C to +85°C |
| Paket | 88-QFN (12 x 12 mm) |
| Package Type | 88-VFQFN with exposed pad |
| Montaj Türü | Surface mount |
| Packaging Type | Tray |
| Switching Architecture | 3-port managed 10/100 Ethernet switch |
| Target Applications | Consumer, embedded, and industrial electronic designs |
| Supplier Order Quantity | 152 units |
| Quoted Unit Price | $7.11 USD at 152 units |
| Lead Time | 6 weeks |
LAN9355I/ML 88-vfqfn with exposed pad Pin Yapısı Kılavuzu
LAN9355I/ML (88-vfqfn with exposed pad paket) için pin yapısı. Pin numaralandırma, işlevleri ve bağlantı şemaları üretici veri kitapçığında tanımlanmıştır. Doğru ayak ve soldurma kılavuzları için onu referans alın.
Ayrıntılı pin çıkış verisi mevcut değil: LAN9355I/ML.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
LAN9355I/ML için uygundur 6 uygulamas: Industrial Ethernet Gateway, Embedded Automation Controller, USB-to-Ethernet Adapter, Communications Appliance, Networked Test and Measurement Instrument, Embedded Consumer Network Adapter.
Industrial Ethernet Gateway
The LAN9355I/ML fits an industrial Ethernet gateway that must consolidate several Fast Ethernet links into a small embedded controller. Its 3-port 10/100 Base-T/TX arrangement can connect a local host, an upstream network, and an equipment-side endpoint without requiring a separate managed switch. The industrial -40°C to +85°C range supports equipment operating beyond typical consumer temperature limits. In the design, the device is placed beside the required Ethernet magnetics and connectors, while its I2C interface allows a host processor to access switch status and configuration registers. Compared with a larger multi-port switch, the 12 x 12 mm 88-QFN package preserves board area, although exposed-pad layout and copper thermal management remain essential.
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Embedded Automation Controller
The LAN9355I/ML is suitable for an embedded automation controller requiring several 10/100 Ethernet service connections on a constrained board. Three managed ports can organize a machine-control network, an engineering interface, and an external supervisory network. The confirmed -40°C to +85°C operating range aligns with industrial controller environments, while the 1.8 V to 3.3 V supply range supports low-voltage embedded platforms. A processor can manage the switch through I2C, and the integrated Fast Ethernet ports reduce board-level networking complexity. Engineers must follow the manufacturer layout for the 88-QFN exposed pad, preserve high-speed trace geometry, and use qualified magnetics and connector implementations to achieve compliant Ethernet behavior.
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USB-to-Ethernet Adapter
The LAN9355I/ML can form the Ethernet side of a compact USB-to-Ethernet adapter because it combines three 10/100 Base-T/TX ports with switch management in one 88-QFN device. A multiport adapter can expose wired network connections to a USB host while maintaining a compact industrial or communications enclosure. The I2C interface provides a management path between the switch and the USB bridge or embedded controller, although implementation details must follow the LAN9355 documentation. The -40°C to +85°C range permits use in demanding equipment. Because the package includes an exposed pad, designers should provide adequate copper area and a controlled thermal path while keeping sensitive USB and Ethernet routing separated.
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Communications Appliance
The LAN9355I/ML is appropriate for compact communications appliances that need a managed Fast Ethernet port bank without allocating space for multiple discrete PHYs. Its three 10/100 ports can support an internal management network, an equipment uplink, and an expansion interface. The small 12 x 12 mm 88-QFN footprint supports dense appliance designs, and the I2C interface enables register-level status monitoring from the appliance controller. The verified industrial temperature rating supports communications equipment deployed in uncontrolled environments. Implementation must account for Ethernet magnetics, connector isolation, proper layer-1 layout, and exposed-pad heat spreading. If application traffic exceeds 100 Mbit/s per port, designers should consider a gigabit-capable switch instead.
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Networked Test and Measurement Instrument
The LAN9355I/ML can support a networked test or measurement instrument that needs multiple Fast Ethernet links for instrument control, data transfer, and maintenance access. The three managed 10/100 ports allow the instrument to maintain separate network paths while a host controller uses I2C for configuration and status. Its -40°C to +85°C operating range supports industrial and laboratory equipment, while the compact 88-QFN package helps control enclosure size. The design should use the manufacturer's recommended decoupling and exposed-pad pattern, and Ethernet signal routing must be kept away from sensitive measurement circuits. Although Fast Ethernet is sufficient for many control and status channels, high-volume instrument data may require a faster network architecture.
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Embedded Consumer Network Adapter
The LAN9355I/ML can be used in a compact embedded consumer networking product that exposes multiple Fast Ethernet connections through a shared controller. A three-port managed design can simplify product variants by supporting wired service, uplink, and accessory connections in one package. The I2C interface lets the host processor inspect switch status and configure the network fabric, while the 1.8 V to 3.3 V supply range supports embedded logic platforms. The 12 x 12 mm package preserves space in compact electronics. Engineers should still verify whether industrial temperature coverage is required for the target enclosure, use qualified Ethernet magnetics, and follow the official exposed-pad and signal-integrity guidance before production release.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: LAN9355I/ML — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | LAN9355/ML |
|---|---|---|
| Package | 88-QFN (12 x 12 mm) | 88-QFN (12 x 12 mm), same-family confirmation required |
| Brand | Microchip Technology | Microchip Technology |
| Device Type | Managed Ethernet switch | Managed Ethernet switch |
| Number of Ports | 3 ports | 3 ports |
| Ethernet Speed | 10/100 Base-T/TX | 10/100 Base-T/TX |
| Management Interface | I2C | I2C |
Ana Farklılayıcılar
- Documented industrial temperature coverage (karşılaştırma:LAN9355/ML)
- Three managed Fast Ethernet ports in one package (karşılaştırma:LAN9355/ML)
- Compact 12 x 12 mm footprint with exposed pad (karşılaştırma:LAN9355/ML)
Tasarım Notları
Use the official LAN9355 land pattern and exposed-pad recommendations for the 88-QFN 12 x 12 mm package. Place the required input and output capacitors close to their associated power pins, keep the exposed-pad connection unobstructed, and provide a low-impedance copper path from the pad to ground. Do not route Ethernet or high-speed digital signals across the exposed-pad area unless the manufacturer layout expressly permits it.
Preserve the Ethernet trace geometry and symmetry recommended by the manufacturer and magnetics vendor. Keep the switching IC, PHY interface section, and connector-side network paths appropriately short, and provide a continuous reference plane. Differential pair routing, via transitions, and return-path discontinuities can degrade signal integrity even when the component and package selections are correct.
Decouple each supply rail according to the LAN9355 datasheet and use the specified voltage range of 1.8 V to 3.3 V. Validate sequencing and current limits for every attached processor and communications component. Because the verified data does not provide regulator architecture, startup timing, or internal current consumption, those values must be obtained from the full manufacturer documentation before power-tree signoff.
Treat the 88-QFN exposed pad as the primary thermal and electrical connection to the board. Provide adequate top and bottom copper where permitted by the package design, thermal vias if recommended, and a stable ambient-temperature design margin. The verified industrial range reaches +85°C, so junction and enclosure conditions should be checked using the manufacturer's thermal data rather than assuming the package rating alone guarantees system reliability.
Do not treat LAN9355/ML or another switch with similar functionality as a drop-in replacement without checking every numbered ball, exposed-pad connection, supply limit, register, and temperature grade. The supplied cross-reference results contain no verified cross-brand pin-compatible equivalent, and even a same-family orderable suffix can alter temperature grade or qualification. Capture the exact manufacturer part number in the schematic and BOM before layout release.
Uyumluluk Bilgisi
The supplied official-page and distributor data do not state device-level RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The -40°C to +85°C industrial operating range does not by itself establish AEC-Q100 qualification.
