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LAN9313-NZW - 3-Port 10/100 Ethernet Switch | Microchip
LAN9313-NZW

LAN9313-NZW - 3-Port 10/100 Ethernet Switch | Microchip

The Microchip Technology LAN9313-NZW is a three-port 10/100 managed Ethernet switch with a parallel MII interface, 128-XVTQFP package, and 14 mm by 14 mm body size. It supports 10BASE-T, 100BASE-TX, and 100BASE-FX connectivity according to the manufacturer datasheet, making the device suitable for embedded industrial, communications, and networked equipment requiring three integrated Ethernet ports. An Ethernet switch is a network-semiconductor category that forwards Ethernet frames between connected ports while supporting full- and half-duplex operation. Within the networking hierarchy, the LAN9313-NZW is an Ethernet switch controller with an embedded Ethernet PHY and Media Independent Interface, bridging an embedded processor or host processor to copper or fiber Ethernet networks. It also supports IEEE 802.1D and 802.1Q network-management protocol specifications. Three configurable general-purpose input/output pins are available for integration with control, status, or interrupt functions beyond the primary Ethernet interface. The device combines switching, physical-layer, and host-interface functions in one package, reducing the need for separate Ethernet PHY components when the parallel MII architecture is appropriate for the host processor. The LAN9313-NZW architecture integrates three 10/100 Ethernet ports with a parallel MII connection to the host. This parallel interface suits embedded systems that have a dedicated controller bus rather than a USB or RGMII interface. Its 128-XVTQFP package provides a compact surface-mount implementation for space-constrained equipment, although exact pin assignments and exposed-pad thermal details must be confirmed in DS00002288A before layout. Typical uses include industrial control equipment, embedded gateways, factory networking modules, communications appliances, and systems requiring both 10BASE-T and 100BASE-TX ports. A 100BASE-FX-capable implementation can also serve fiber-based network interfaces when the board includes suitable optical magnetics and the required external circuitry. The main design consideration is the parallel MII interface. Its wiring, signal-integrity requirements, and host-bus compatibility must be evaluated against the processor used in the design. Decoupling, exposed-pad connection, clocking, magnetics, and LED interfaces should be implemented using the guidance in the manufacturer datasheet and LAN9313 reference-design schematic rather than inferred from general Ethernet practice. This product page consolidates the verified manufacturer and distributor information, identifies package-related documentation gaps, compares the documented LAN9313 family variant, and provides selection guidance that helps distinguish a genuine drop-in option from a merely similar Ethernet controller.

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LAN9313I-NZW - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9313I-NZW

LAN9313I-NZW - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9313I-NZW is a three-port 10/100 managed Ethernet switch with an integrated MII host interface, operating from a 3.3 V supply in a 128-lead XVTQFP (14 x 14 mm) package with exposed pad. It draws about 135 mA of supply current and complies with the IEEE 802.3 full- and half-duplex 10BASE-T and 100BASE-TX protocol specifications plus 802.1D and 802.1Q network management specifications. A managed Ethernet switch is an active network device that learns MAC addresses and forwards frames between ports with filtering, VLAN tagging and priority handling, rather than repeating traffic blindly like a hub. In the product-type hierarchy, this part sits as an Ethernet switch, inside Ethernet interface controllers, inside network interface ICs, and finally inside integrated circuits for data communication. The LAN9313 family is the managed-switch branch of the 10/100 family; the LAN8710/LAN8720 parts are unmanaged or single-port alternatives, and the LAN9115/LAN9215 parts are single-port controllers rather than switches. Key features include three integrated 10/100 Ethernet PHYs in one device, a 16-bit MII interface to the host processor, hardware-based frame handling that offloads forwarding work from the MCU, 802.1Q VLAN support, 802.1D spanning-tree-aware managed switching, and a 48 MHz or 25 MHz crystal-free clocking option that reduces external component count. The three PHYs each support auto-negotiation, auto-polarity correction and auto-MDIX, so each port connects directly to a magnetics-based RJ-45 without manual crossover handling. The device integrates the digital switching core, the three PHY analog front ends and the MII host interface in one package, which removes the need for an external switch ASIC plus discrete PHYs. Because the MII interface is parallel rather than serial RMII, the host processor must provide a 16-bit data bus and a reference clock, which is straightforward on most industrial 32-bit microcontrollers and application processors with sufficient GPIO and DMA capability. Typical uses include industrial Ethernet gateways, factory floor controllers, embedded routers, set-top and access equipment, printer and copier network interfaces, and any embedded product that needs to fan out a single host processor to three wired Ethernet ports while retaining VLAN and traffic-management control. When designing around this part, budget the MII bus carefully: it needs roughly 16 data lines plus control signals, and the host processor must supply a 25 MHz or 50 MHz reference clock with the correct phase relationship. Place the 1.2 V and 3.3 V decoupling capacitors close to the supply pins and keep the exposed pad tied to ground for thermal performance. This page consolidates manufacturer datasheet data, distributor availability, package details, drop-in alternatives and practical layout guidance for engineers who want everything about the LAN9313I-NZW in a single reference rather than spread across datasheet pages and distributor listings.

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LAN9352/ML - 2-Port 10/100 Managed Ethernet Switch, SPI/SQI | Microchip
LAN9352/ML

LAN9352/ML - 2-Port 10/100 Managed Ethernet Switch, SPI/SQI | Microchip

The Microchip LAN9352/ML is a high-performance, small-footprint, full-featured 2-port managed Ethernet switch with integrated 10/100 Base-T/TX PHYs, delivered in a 72-pin QFN (10x10 mm) package with exposed pad. It targets consumer, embedded, and industrial designs that require highly integrated, cost-effective dual-port switching with a non-PCI 16-bit SPI/SQI host interface. The device supports 1.8V to 3.3V I/O and core supplies, easing integration with low-voltage MCUs and ASICs. A managed Ethernet switch is a Layer-2 networking device that connects multiple Ethernet segments, performs MAC-based frame forwarding, and exposes configuration/management features such as VLANs, QoS, port mirroring, and statistics counters. The LAN9352 sits in the managed-fast-Ethernet-switch IC taxonomy: Ethernet switch -> Layer-2 switch -> managed switch -> integrated-PHY switch. Unlike an unmanaged switch, the LAN9352/ML allows the host MCU to program registers for traffic shaping, IGMP snooping, and storm control, which is critical for real-time industrial protocols and AV streaming. Key features include two integrated 10/100 PHYs with HP Auto-MDIX, support for IEEE 802.1Q VLAN and 802.1p QoS priority, a 16-bit SPI/SQI host interface, optional I2C management, and 32 KB of internal packet buffer. The device operates across the commercial 0C to 70C temperature range and supports Energy Efficient Ethernet (EEE) idle patterns, making it suitable for power-sensitive embedded applications. The LAN9352/ML uses Microchip's proprietary switch fabric and supports cut-through and store-and-forward modes, along with 1.5 KB per-port address table. Hardware-based QoS with four priority queues and a per-port rate limiter enable deterministic traffic shaping for industrial Ethernet, audio/video bridging (AVB), and PROFINET-style real-time protocols. Typical applications include industrial Ethernet gateways, factory automation PLCs, building automation controllers, IP surveillance NVR/DVR switches, point-of-sale terminals, embedded web server appliances, and consumer smart-home hubs that need a low-BOM 2-port switch fabric. The integrated dual-PHY approach removes the need for an external Ethernet transformer-pair, shrinking PCB area. When designing with this device, allocate at least 4-layer routing for the two 100BASE-TX differential pairs to maintain return loss. Place the 72-QFN exposed pad soldered to a continuous ground plane for thermal dissipation; a stitched via array under the EP is recommended. The host SPI/SQI clock can run up to 80 MHz - check MCU timing margin when the switch is in cut-through mode. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, plus a 5-question FAQ block for AEO citation.

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LAN9352/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip
LAN9352/PT

LAN9352/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9352/PT is a 2-port 10/100 managed Ethernet switch with integrated 10/100 Base-T/TX PHYs, I2C and SPI host interfaces, and an 80-pin TQFP exposed-pad package measuring 12 x 12 mm. It combines two Ethernet ports, switch management, and host connectivity in one device for cost-controlled embedded networking. The verified source identifies it specifically as a 2-port, 100 Mbps managed Ethernet switch. An Ethernet switch is a network-interface semiconductor that connects multiple Ethernet endpoints, forwards frames between ports, and exposes control functions to a host processor. The LAN9352/PT sits in the hierarchy of Ethernet controller, interface IC, network switch, and embedded connectivity semiconductor. Its integrated 10/100 PHIs reduce external PHY requirements while its managed-switch architecture supports configuration by an embedded controller rather than a simple fixed-function repeater. The principal verified features include two 10/100 Ethernet ports, integrated 10/100 Base-T/TX PHYs, and both I2C and SPI host interfaces. These interfaces give the embedded system two control paths, while the managed architecture provides a feature set intended for consumer, embedded, and industrial designs. Microchip describes the family as optimized for systems that need high integration, design flexibility, ease of integration, and system cost control. The LAN9352/PT targets equipment that needs a compact two-port network node without a separate Ethernet switch and external PHY components. A host processor can configure the device through I2C or SPI, making it suitable for gateways, embedded controllers, industrial interfaces, and connected products. Exact port ordering, register defaults, electrical limits, timing, and management features must be confirmed in the manufacturer datasheet before schematic release. A primary integration consideration is the 80-pin 12 x 12 mm TQFP exposed-pad footprint. The land pattern, exposed-pad connection, clock source, magnetics or integrated PHY support components, and host signals must follow the reference design. Do not treat a functional LAN9352-family ordering code as automatically drop-in compatible; the I, TI, and temperature-grade suffixes can change device features or qualification. For an embedded two-port Ethernet design, the LAN9352/PT offers meaningful consolidation of switch and PHY functions. Selection depends on the required port count, host interface, timing, clock architecture, environmental grade, package, and production availability. This page combines verified distributor and manufacturer information with application guidance while leaving unverified electrical values explicitly marked for completion.

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LAN9352I/ML - 2-Port 10/100 Ethernet Switch | Microchip
LAN9352I/ML

LAN9352I/ML - 2-Port 10/100 Ethernet Switch | Microchip

The Microchip LAN9352I/ML is a highly integrated, two-port managed Ethernet switch supporting 10/100 Base-T/TX networking, with an I2C or SPI host interface and a 72-QFN package measuring 10 mm by 10 mm. It combines two integrated Fast Ethernet PHYs with switch management functions in a compact surface-mount package, providing a practical single-chip networking solution for embedded equipment. A managed Ethernet switch is an Ethernet interface IC that connects multiple copper-network nodes while supporting traffic control, configuration, status monitoring, and host access. Within the product hierarchy, the LAN9352I/ML belongs to the managed switch class, connects to Ethernet physical-layer transceivers through integrated PHYs, and serves as a network interface within an embedded system or industrial control product. The device provides two 10/100 Ethernet ports, an 8-bit or 16-bit non-PCI CPU interface, and support for I2C or SPI host communication. These resources allow an embedded processor to initialize the switch, monitor port activity, and implement network-control functions without requiring a separate discrete Ethernet switch and management interface. The industrial-oriented I/ML ordering variant is identified by Microchip as the LAN9352i option. The switch integrates the digital MAC, switch fabric, and 10/100 Base-T/TX physical-layer functions needed for a compact dual-port network node. Its managed architecture makes it more capable than a basic unmanaged PHY while avoiding the footprint of a larger multi-port switch implementation. The compact 72-QFN package also supports dense industrial, consumer, and embedded-equipment layouts when board area and routing continuity are important. Typical applications include industrial control systems, embedded instrumentation, consumer appliances, communications equipment, and compact network interfaces connected to a host processor through I2C or SPI. A two-port arrangement can support equipment-to-equipment links, a service connection combined with an internal network link, or a bridged connection between two Fast Ethernet networks. PCB implementation requires careful attention to the exposed-pad thermal path, Ethernet magnetics or integrated magnetics, clock and crystal requirements, and the manufacturer-specified magnetic components and termination network. Preserve the recommended high-speed trace geometry and isolate analog clock and PHY routing from switching or processor signals where the layout guidance calls for it. This product resource consolidates the confirmed LAN9352I/ML capabilities, pin-compatible family considerations, interface comparisons, application guidance, and PCB design notes into an engineering-focused reference for Ethernet switch implementation.

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LAN9352I/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip
LAN9352I/PT

LAN9352I/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip

Microchip Technology LAN9352I/PT is a two-port managed 10/100 Ethernet switch with two integrated 10BASE-T/100BASE-TX PHYs, I2C and SPI host interfaces, and an 80-pin TQFP exposed-pad package measuring 12 x 12 mm. It operates from a 1.2 V to 3.3 V supply and supports IEEE 802.3 and IEEE 802.3u Ethernet traffic at up to 100 Mbps per port. A managed Ethernet switch is an integrated network-semiconductor device that combines PHYs, packet handling, port management, and a host interface in one component. It sits between an embedded processor or control system and one or more Ethernet ports, providing a compact alternative to discrete transceivers, magnetics, and separate switch silicon. The LAN9352 family is positioned for cost-sensitive consumer, embedded, and industrial equipment requiring integrated two-port connectivity. The LAN9352I/PT combines two 10/100 ports with I2C and SPI host control, allowing firmware to configure switch registers, monitor port activity, and manage network behavior. Its industrial-temperature designation distinguishes it from the standard LAN9352 variant, while the 12 x 12 mm exposed-pad TQFP package supports compact board layouts and improved thermal coupling through its exposed thermal pad. The tray packaging code identifies the /PT ordering option. The integrated switch architecture reduces the number of external Ethernet interface components required in embedded equipment. Both ports support 10 Mbps and 100 Mbps operation, allowing automatic compatibility with legacy 10BASE-T equipment and 100BASE-TX networks. Host configuration through I2C or SPI simplifies connection to embedded processors, microcontrollers, and industrial controllers that already expose one of these serial interfaces. Typical uses include industrial automation controllers, embedded network appliances, point-of-sale terminals, printers, set-top equipment, and connected industrial modules. In these systems, the switch can provide two network-facing ports while the host processor accesses management and status registers. Selection should account for the exposed-pad land pattern, 80-pin routing density, required magnetic isolation, and the 3.3 V power architecture. Place the LAN9352I/PT close to its Ethernet magnetics and connector-side circuitry to minimize high-frequency routing risk. Keep the exposed pad connected to the intended ground plane, use short and continuous supply connections, and follow the manufacturer’s recommended decoupling and component-layout guidance. Confirm all interface levels, strap options, and power rails against the device documentation before layout release. This product guide combines the device architecture, package and interface constraints, application guidance, procurement fields, and verified drop-in considerations. It is designed to help hardware and sourcing engineers evaluate the LAN9352I/PT against same-package alternatives without overlooking pin compatibility, thermal-pad implementation, or managed-switch feature requirements.

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LAN9352T/ML - 2-Port 10/100 Managed Ethernet Switch | Microchip
LAN9352T/ML

LAN9352T/ML - 2-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9352T/ML is a two-port 10/100 Base-T/TX managed Ethernet switch with a 16-bit non-PCI SPI/SQI host interface, supplied in a 72-lead VQFN package measuring 10 mm by 10 mm. The device integrates two Fast Ethernet PHYs, switching functions, and host connectivity into one compact surface-mount component. A managed Ethernet switch is a network-semiconductor device that coordinates traffic between multiple physical Ethernet ports while providing register-level control over functions such as port configuration, addressing, and traffic handling. In the product hierarchy, the LAN9352 belongs to Ethernet controllers, interface ICs, and integrated circuits. Its managed architecture is intended for applications that need deterministic two-port connectivity without using a separate external switch controller for each port. The principal interface features include two 10/100 Base-T/TX ports, I2C and SPI host connectivity, and a non-PCI 8/16-bit CPU interface. According to the Microchip LAN9352 product page, the LAN9352 and LAN9352i family is optimized for cost-effective consumer, embedded, and industrial designs. The /ML ordering option is supplied in tape-and-reel packaging with a standard quantity of 3000 units. The LAN9352T/ML consolidates two Ethernet PHYs, a managed switching block, and an embedded host interface in one package. This integration can reduce the component count and board area associated with a two-port Ethernet design. The 16-bit non-PCI interface supports processor or microcontroller connectivity without requiring a PCI bus, while the I2C option provides an additional configuration path for suitable embedded systems. Typical uses include industrial Ethernet equipment, embedded controllers, factory automation modules, printer and scanner subsystems, IP-based access hardware, and compact communication gateways. In these systems, two integrated ports can connect a controller to both an upstream network and a downstream device, or provide direct copper links to two external modules. The 10/100 Base-T/TX capability is suited to legacy Fast Ethernet infrastructure and cost-sensitive industrial networks. The main design consideration is layout-sensitive integration of two high-speed copper PHYs on a dense 10 mm by 10 mm surface-mount footprint. Differential pair routing, solid reference planes, controlled via geometry, isolation from noisy circuitry, and correct magnetics or cable-side implementation are essential for reliable link performance. Follow the manufacturer reference design and pin-description table when assigning PCB nets and placing the Ethernet magnetics. This page combines the verified Microchip product information with practical design guidance, application analysis, and drop-in replacement context. It is intended to help engineers evaluate the LAN9352T/ML for embedded networking projects, compare it with related managed-switch options, and plan a compliant PCB implementation before releasing a design to production.

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LAN9352T/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip Technology
LAN9352T/PT

LAN9352T/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip Technology

The Microchip Technology LAN9352T/PT is a 2-port managed Ethernet switch with integrated 10/100 Base-T/TX PHYs, available in an 80-lead TQFP-EP package measuring 12 mm by 12 mm. The device combines two integrated Fast Ethernet PHYs, switching functions, a host interface, and management features in one compact component, making it suitable for embedded Ethernet equipment, industrial controllers, and connected consumer products. A managed Ethernet switch is an interface IC that coordinates traffic between a host processor and multiple Ethernet ports. It can provide per-port configuration, status monitoring, link detection, and controlled frame forwarding, while the integrated PHYs reduce the external magnetic-component count compared with a discrete Ethernet design. LAN9352T/PT is positioned for compact embedded systems where two 10/100 ports provide a practical balance of connectivity, size, and functionality. The device supports 10/100 Base-T/TX Ethernet operation and offers I2C and SPI host interfaces for configuration and control. The manufacturer describes LAN9352 as a high-performance, small-footprint, fully featured 2-port managed Ethernet switch optimized for consumer, embedded, and industrial designs. Its integrated architecture can shorten PCB routing and reduce component count compared with using separate Ethernet switch and PHY devices. Because this orderable suffix identifies an 80-lead TQFP-EP package with gull-wing leads, the component is intended for surface-mount PCB assembly. The exposed-pad construction provides a thermal path from the die to the board copper, but layout should preserve the manufacturer-recommended land pattern and thermal-via arrangement. Confirm the exact pin functions, recommended external components, and exposed-pad connection in the manufacturer datasheet before finalizing a new layout. Typical uses include industrial Ethernet gateways, embedded control systems, set-top equipment, print servers, network-connected test instruments, and compact embedded platforms that need two Fast Ethernet ports behind a serial host interface. The LAN9352T/PT is especially useful when the design benefits from integrated PHYs and local switch management without allocating a separate PHY for each port. For a robust implementation, route each Ethernet differential pair as a controlled-impedance transmission line, use the prescribed magnetics and line-side components, place high-frequency bypass capacitance close to the supply pins, and connect the exposed thermal pad to the recommended ground-plane structure. Review clock, reset, and power sequencing requirements in the manufacturer datasheet. This page combines package, interface, sourcing, replacement, and design guidance to support initial component selection and PCB planning.

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LAN9352TI/ML - 2-Port 10/100 Ethernet Switch | Microchip
LAN9352TI/ML

LAN9352TI/ML - 2-Port 10/100 Ethernet Switch | Microchip

The Microchip Technology LAN9352TI/ML is a highly integrated, two-port managed Ethernet switch with 10/100 Base-T networking capability, I2C and SPI host interfaces, and a 72-pin QFN package measuring 10 mm by 10 mm. It is designed for embedded, consumer, and industrial systems that need compact Ethernet switching without implementing a discrete switch subsystem. An Ethernet switch is a network-semiconductor device that receives frames on one port, examines the destination address, and forwards traffic to the appropriate port when required. The LAN9352 integrates two Fast Ethernet ports, switching functions, physical-layer interfaces, and host-control connectivity into one package. Its managed architecture allows an embedded processor or another controller to configure switch behavior rather than relying on a fixed, unmanaged network topology. The device uses I2C and SPI interfaces for host communication, enabling configuration and control from embedded processors, industrial controllers, or network equipment. According to the Microchip product page, the LAN9352 family targets consumer, embedded, and industrial designs requiring a cost-effective, highly integrated Ethernet solution. The compact 72-QFN package also reduces board area compared with a multi-chip implementation containing separate Ethernet PHYs and a switch controller. The LAN9352TI/ML package variant is supplied in tape-and-reel form for automated assembly. Distributor technical listings identify a 1.8 V to 3.3 V supply range and an operating-temperature range from -40 °C to +85 °C. Its 72-VFQFN exposed-pad construction provides an exposed thermal and electrical connection to the PCB, allowing controlled heat transfer into the board copper when the layout follows the manufacturer's recommended land pattern and thermal guidelines. Typical applications include industrial Ethernet equipment, embedded control panels, connected instruments, industrial automation gateways, set-top equipment, and embedded systems that require two Fast Ethernet ports. The integrated switch is particularly useful where two network devices must share a common uplink without adding a full-size external switch module. Host-side management can support diagnostic monitoring, controlled startup, port configuration, and network status reporting. Layout is critical because Ethernet interfaces combine sensitive analog signaling with high-speed digital control. Follow the manufacturer's pin-assignment table and reference layout, provide the specified decoupling capacitors, route each differential pair as a controlled-impedance pair, and preserve the required separation from noisy power and switching circuitry. Treat the exposed pad as a thermal and electrical feature rather than an optional copper pour. This page consolidates the confirmed manufacturer and distributor information into a focused engineering resource. It compares package and interface requirements, explains the practical role of the integrated switch, and provides application-oriented design guidance that goes beyond a basic distributor listing. For complete pin assignments, register definitions, timing limits, and electrical characteristics, use the manufacturer documentation linked on this page.

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LAN9352TI/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip
LAN9352TI/PT

LAN9352TI/PT - 2-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9352TI/PT is a highly integrated, two-port managed Ethernet switch with integrated 10/100 Base-T/TX PHYs and a 16-bit non-PCI SPI/SQI host interface. The device operates from a single 3.3 V supply, includes an integrated 1.2 V regulator, and is offered in an 80-lead TQFP-EP package measuring 12 x 12 mm. Its combination of Ethernet connectivity, port management, and host control makes it suitable for embedded industrial, consumer, and networking equipment. An Ethernet switch is a semiconductor device that connects multiple nodes on a local network and manages frame forwarding between ports. The managed designation indicates that port behavior can be configured rather than operating only as a simple physical-layer repeater. Within the product hierarchy, the LAN9352TI/PT is a two-port managed Ethernet switch with integrated PHYs, a network-interface controller, and configurable general-purpose I/O functions. Key features include two integrated 10/100 Base-T/TX PHY ports, a 16-bit non-PCI SPI/SQI interface, I2C and SPI host connectivity, and multifunction GPIOs. The single 3.3 V supply architecture simplifies board-level power planning, while the internal 1.2 V regulator supports the core circuitry. A low-cost 25 MHz crystal can be used where the corresponding clocking configuration is supported, helping reduce the external component count. The LAN9352TI/PT is designed for designs that require two wired-network connections without allocating a discrete PHY and switch controller for each port. Its 80-lead TQFP-EP package exposes the Ethernet magnetics interfaces, power rails, host interface, clocks, management signals, and multifunction GPIOs through a single surface-mount footprint. The exposed pad supports improved thermal dissipation when the board provides adequate copper and thermal via coverage. Typical applications include industrial control equipment, embedded gateways, factory monitoring systems, building automation controllers, set-top equipment, printers, and other products that connect embedded logic to 10/100 Ethernet networks. Because the device is managed, software can configure operational parameters and monitor port activity through its host-accessible control interfaces. For PCB design, place the Ethernet magnetics and the device according to the high-speed layout guidance in the manufacturer reference design, route differential pairs as controlled-impedance nets, and provide the decoupling network specified for each supply rail. Treat the exposed pad as a thermal and electrical connection to the ground-plane strategy, and validate final magnetics and isolation-component selections against the target cable length and regulatory requirements. This page consolidates device specifications, verified sourcing links, application guidance, and a compatibility-focused comparison framework. It also identifies where the 80-lead TQFP-EP package differs from the 72-lead QFN option in the same LAN9352 family, helping designers confirm land-pattern reuse before committing to a PCB revision.

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LAN9353/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9353/ML

LAN9353/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9353/ML is a fully integrated 3-port 10/100 managed Ethernet switch controller in a 64-pin QFN (9 x 9 mm) package with exposed pad. It provides three integrated 10/100BASE-T/TX PHYs, a switch fabric with per-port QoS, VLAN tagging and rate limiting, and an I2C/SMBus host interface for host-driven configuration. According to the Microchip LAN9353 datasheet (00001925A), the device supports interfaces at up to 200 Mbps via Turbo MII and runs from a 1.8 V to 3.3 V core supply. An Ethernet switch IC is a semiconductor that combines multiple Ethernet physical layer (PHY) transceivers with a frame-processing fabric in one package. A "managed" switch adds register-programmable features - VLAN tags, priority queues, traffic classifiers, port-based rate limits and loop/ingress filtering - that an unmanaged switch cannot offer. The LAN9353 sits in the hierarchy: Ethernet switch controller -> Ethernet interface IC -> network interface controller -> integrated circuit. Key features include three integrated 10/100 PHYs, full Auto-Negotiation with HP Auto-MDIX on every port, deterministic store-and-forward switching with 16 Kbyte frame buffers, and a host-accessible register set over I2C/SMBus for static and dynamic VLAN, QoS and port configuration. The switch fabric operates at 200 Mbps per port through Turbo MII for host or microcontroller connectivity. Internally the LAN9353 pairs a RISC-based switch core with three integrated 10/100BASE-T PHYs, and it targets cost-sensitive embedded designs where a discrete PHY plus external switch would add board area, cost and design effort. Integration reduces the number of magnetics, RJ-45 magnetics remain external, but the PHY analog, digital interfaces and management registers are consolidated on one die. Typical applications include embedded Linux and RTOS gateways, industrial and building automation controllers, consumer set-top and smart-home hubs, USB-to-Ethernet adapters, print servers and networked embedded instrumentation, where three copper ports plus host-managed configuration are required in a single 9 x 9 mm footprint. When designing with the LAN9353/ML, budget careful attention to the exposed thermal pad, the 1.8 V to 3.3 V supply sequencing and the I2C pull-up network. Because it is a managed switch, firmware or a host microcontroller must configure VLAN and QoS tables, or the device runs with its power-on defaults. This page consolidates distributor pricing, package and pin information, verified drop-in alternatives, and practical integration notes that are not presented together in the manufacturer datasheet.

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LAN9353I/ML - 3-Port Managed Ethernet Switch | Microchip
LAN9353I/ML

LAN9353I/ML - 3-Port Managed Ethernet Switch | Microchip

The Microchip Technology LAN9353I/ML is a highly integrated 3-port managed Ethernet switch with integrated 10/100 Base-TX PHYs, an I2C management interface, and support for MII, RMII, Turbo MII, and dual RMII host connectivity. It is packaged in a 64-pin QFN measuring 9 mm by 9 mm, providing a compact solution for embedded networking designs. The device also supports optical-fiber connections, IEEE 1588 timestamping, cable diagnostics, low-power operation, power-on reset, and programmable LED indication. An Ethernet switch is a network-semiconductor device that connects multiple physical network ports and manages frame transfer between them and an embedded host. The LAN9353I/ML belongs to the Ethernet interface IC category, where it combines copper and fiber connectivity, media-independent host interfaces, management functions, and PHY integration. This combination reduces the number of separate networking components required in industrial controllers, embedded computing modules, consumer equipment, and connected products. The principal feature set includes three managed 10/100 Ethernet ports, integrated PHY functions, an I2C control interface, and flexible connectivity to a host processor through MII, RMII, Turbo MII, or dual RMII. IEEE 1588 timestamping provides support for time-sensitive network functions, while cable diagnostics help identify wiring faults. Programmable LEDs allow port activity and status to be presented locally, and low-power mode supports designs where sustained Ethernet activity is not always required. The 64-QFN package is intended for compact embedded systems and offers a single highly integrated device instead of a discrete switch, several PHYs, an external management controller, and separate clocking or interface circuitry. MII provides the broadest parallel host interface, Turbo MII supports higher parallel throughput, and RMII or dual RMII can reduce host pin count when system routing and clocking permit. The supported fiber connection expands design options where longer links or greater noise immunity are required. Typical applications include industrial automation equipment, embedded controllers, data-logging systems, connected test equipment, consumer appliances, and compact computing modules. These systems benefit from a managed switch with integrated diagnostics and host-interface flexibility, particularly where copper and fiber links may coexist. Exact electrical ratings, clock limits, operating-temperature limits, and management details must be confirmed in the manufacturer datasheet before final design release. For PCB implementation, follow the manufacturer's 64-QFN land pattern, exposed-pad requirements, decoupling guidance, and high-speed interface-layout recommendations. Keep MII, RMII, and clock traces short and controlled, provide a clean low-noise supply network, and verify differential Ethernet routing against the datasheet reference layout. This page consolidates verified distributor data, switching features, sourcing information, and design guidance into one engineering-oriented reference.

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LAN9353I/PT - 3-Port Managed Ethernet Switch | Microchip
LAN9353I/PT

LAN9353I/PT - 3-Port Managed Ethernet Switch | Microchip

The Microchip Technology LAN9353I/PT is a highly integrated three-port managed Ethernet switch with 10/100 Base-T/TX PHY support and an I2C interface, housed in a 64-pin TQFP exposed-pad package measuring 10 mm by 10 mm. The device combines three Fast Ethernet switch ports, integrated physical-layer transceivers, and host configuration control in one compact component. A managed Ethernet switch is a network-semiconductor device that connects multiple endpoints through frame-based Ethernet links while providing controlled forwarding behavior, status information, and configuration access. Within the product hierarchy, the LAN9353I/PT is an Ethernet switch controller, an interface IC, and ultimately a semiconductor designed for embedded communications systems. Its integrated PHYs reduce the external component count required for a compact three-port Ethernet node. The verified product information identifies the LAN9353I/PT as an Ethernet switch with 10/100 Base-T and TX PHY connectivity, an I2C interface, three switch ports, and a 64-TQFP exposed-pad package. The I suffix denotes the industrial-oriented ordering configuration in Microchip's LAN9353 family, while PT identifies the specified package and tray presentation. The verified distributor listing also states a supply-voltage range of 1.8 V to 3.3 V and an operating-temperature range of -40 °C to 85 °C. Its integration is important in embedded systems because board designers can use one device for multiple Fast Ethernet connections instead of implementing separate Ethernet controllers and external PHY components. The switch controller provides a managed-network architecture rather than simply exposing one host interface. The I2C interface supports connection to a host microcontroller or another control element, while the integrated 10/100 PHYs support copper Ethernet connections. Exact internal block dimensions, register defaults, and detailed timing limits are not included in the supplied verification excerpts. Typical uses include industrial Ethernet gateways, embedded control systems, consumer networking equipment, set-top boxes, printers, and compact embedded Ethernet interfaces. The 10 mm by 10 mm exposed-pad package is particularly relevant to space-constrained equipment, while the three-port architecture is useful where a device must consolidate several local Fast Ethernet links. A complete design still requires appropriate magnetic isolation or magnetics, connector choices, routing rules, firmware, and an operating system or embedded network stack compatible with managed-switch configuration. The most important design consideration is PCB implementation. The exposed thermal pad requires a properly designed thermal-via and ground-copper pattern, while the Ethernet differential pairs need controlled impedance and minimized separation from switching sources. Power must remain within the verified 1.8 V to 3.3 V supply range, and the operating environment must remain within -40 °C to 85 °C. Designers should consult the complete manufacturer datasheet and errata before finalizing pin connections, magnetics, register programming, and layout. This page consolidates verified manufacturer, distributor, pricing, package, interface, and sourcing information while clearly separating unavailable engineering details. It also documents the limited verified drop-in substitution landscape instead of presenting functionally similar Ethernet devices that require a different footprint as drop-in replacements.

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LAN9353T/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9353T/ML

LAN9353T/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip

Microchip Technology LAN9353T/ML is a three-port managed 10/100 Base-T Ethernet switch with integrated 10/100 Base-TX PHY interfaces and an I2C management interface, supplied in a 64-pin QFN exposed-pad package measuring 9 mm by 9 mm. It supports a 1.8 V to 3.3 V operating supply range, includes wake-up functionality, and provides power-up and reset configuration together with non-volatile configuration storage. An Ethernet switch is a network-semiconductor device that connects multiple endpoint or network segments through one or more physical ports. The LAN9353 belongs to the managed Ethernet switch category, where “managed” indicates that configuration and status can be controlled through a host interface rather than operating only as a simple fixed-function repeater. In the product hierarchy, it is an Ethernet interface controller within integrated circuits and broader network semiconductors. The principal benefits of the LAN9353T/ML are its integrated three-port 10/100 Ethernet capability, compact surface-mount footprint, and host-controlled management. Its I2C interface allows an embedded controller to read status and configure switch behavior, while interrupt generation supports event-driven host software. Wake-up operation can reduce the energy burden of intermittently connected products without requiring the entire host system to remain continuously active. Power-up and reset configuration makes the device suitable for designs that require deterministic initialization after power is applied. Non-volatile configuration storage preserves selected settings across power cycles, reducing repeated host configuration and supporting autonomous network behavior. The manufacturer datasheet identifies the device as a 3-port, 10 Mbps to 100 Mbps Ethernet switch in a 64-pin QFN exposed-pad package. Typical uses include embedded control systems, industrial equipment, consumer products, USB-to-Ethernet adapters, set-top equipment, and connected industrial modules. In each case, the three integrated ports can reduce the need for separate Ethernet PHYs and provide a compact switching function. A 9 mm by 9 mm QFN package also supports space-constrained PCB layouts, although exposed-pad thermal management and high-speed layout remain important. Designers should provide the datasheet-specified supply, decoupling, clock, magnetic-interface, and magnetics support required by the complete Ethernet implementation. Place the exposed pad to a thermal and ground plane as directed by the manufacturer layout guidance, keep sensitive Ethernet traces short and properly controlled, and validate magnetics and isolation requirements for each network application. This page consolidates the verified manufacturer and distributor information for LAN9353T/ML, including package identification, management features, commercial availability, and design-focused selection guidance. It also distinguishes verified drop-in alternatives from unreferenced substitutes so procurement and engineering decisions remain traceable to supplied sources.

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LAN9353T/PT - 3-Port 10/100 Ethernet Switch | Microchip
LAN9353T/PT

LAN9353T/PT - 3-Port 10/100 Ethernet Switch | Microchip

The Microchip Technology LAN9353T/PT is a 3-port managed Ethernet switch with integrated 10/100 Base-T/TX PHY interfaces, an I2C control interface, and a 64-pin TQFP-EP package measuring 10 mm by 10 mm. The device is specified for a 0°C to 70°C operating range and provides a compact surface-mount solution for consumer, embedded, and industrial networking equipment. An Ethernet switch is a network-interface integrated circuit that connects multiple Ethernet ports and manages frame forwarding between local devices. The LAN9353 belongs to the controller and interface-IC hierarchy, combining multiple 10/100 Ethernet PHYs, switching functions, and host-control connectivity in one package. This integration reduces the component count required for a small Ethernet switching subsystem while supporting embedded network management through I2C. Key features include three 10/100 Base-T/TX ports, managed-switch operation, an I2C interface, and a compact 64-TQFP-EP package. The 10 mm by 10 mm package uses a 0.5 mm terminal pitch and has a maximum seated height of 1.2 mm. These package characteristics make the device suitable for space-constrained embedded products where discrete Ethernet-interface components would be impractical. The LAN9353 is designed to provide Ethernet connectivity for embedded consumer, industrial, and communications systems. Its integrated 10/100 Base-T/TX PHY interfaces support copper Ethernet connections, while the managed-switch architecture supports controlled forwarding rather than operating only as a basic repeater. The I2C interface provides a means for an embedded host or system controller to access device functions, although detailed register procedures must be confirmed in the manufacturer datasheet and associated documentation. Typical applications include industrial control systems, embedded instrumentation, network-connected test equipment, and compact consumer networking products. In these systems, the switch can provide multiple Ethernet ports to local sensors, controllers, computers, or service interfaces. Design decisions should account for the manufacturer reference design, magnetics requirements, termination, clocking, supply sequencing, and the exposed-pad layout before PCB signoff. The most important layout consideration is thermal and power integrity around the 64-pin TQFP-EP package. Place all decoupling capacitors close to their associated supply pins, provide an uninterrupted ground plane, and follow the exposed-pad land pattern and thermal-via recommendations in the manufacturer documentation. Preserve the specified differential-pair geometry for each 10/100 Ethernet channel and validate magnetics isolation and return-path continuity in the final board stack-up. This page combines verified manufacturer and distributor information with package, sourcing, selection, and design guidance. It also clearly distinguishes documented specifications from parameters that remain to be confirmed in the full LAN9353 datasheet, supporting faster component evaluation without substituting unverified electrical values.

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LAN9353TI/ML - 3-Port 10/100 Managed Ethernet Switch
LAN9353TI/ML

LAN9353TI/ML - 3-Port 10/100 Managed Ethernet Switch

The Microchip Technology LAN9353TI/ML is a highly integrated 3-port managed Ethernet switch with three 10/100 Base-T/TX ports, an I2C host interface, and a 64-pin QFN package measuring 9 x 9 mm. It is intended for consumer, embedded, and industrial electronic designs that need multiple Ethernet connections without implementing separate switch controllers and physical-layer transceivers. An Ethernet switch is a semiconductor that connects multiple Ethernet endpoints through internal frame switching. It sits between the physical network and the host processor, then manages traffic arriving from connected devices. A managed switch can provide controlled network operation rather than functioning only as a basic frame-forwarding bridge. The LAN9353TI/ML combines that switching role with a compact surface-mount package suitable for space-constrained embedded products. The primary electrical and functional characteristics are a 3-port architecture, 10/100-Mbps Ethernet support, managed-switch operation, and an I2C control interface. Its 64-QFN package supports dense PCB layouts while providing a substantial number of power, ground, signal, and exposed-pad connections. The TI/ML ordering form denotes the manufacturer's tape-and-reel production configuration. Within the LAN9353 family, the LAN9353 and LAN9353i devices are described by Microchip as high-performance, small-footprint, full-featured 3-port managed Ethernet switches. Their integration is intended to reduce external component count and simplify the connection of embedded equipment to 10/100-Mbps Ethernet networks. This makes the family relevant to industrial controllers, connected consumer products, and embedded systems requiring several network ports. Typical implementation places the switch close to the host interface and Ethernet magnetics, with careful routing of differential Ethernet pairs and controlled return paths for high-speed signals. The I2C interface allows an embedded controller to access device configuration and status functions. Board-level design must also account for the exposed thermal pad, power distribution, crystal or clock requirements, magnetics selection, and the manufacturer-recommended decoupling network. For a new three-port design, the principal trade-off is integration versus upgrade flexibility. A fixed-function managed switch reduces external circuitry and software overhead, but it is less flexible than a modular network architecture using discrete Ethernet PHYs and a separate switching controller. Confirm the required management features, supported physical-layer options, clocking arrangement, and board-level reference design before releasing production hardware. This page brings together the manufacturer family description, package information, interface details, sourcing records, practical application guidance, and pin-compatible alternatives identified through Microchip and distributor cross-reference information for faster engineering evaluation.

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LAN9353TI/PT - 3-Port Managed Ethernet Switch | Microchip
LAN9353TI/PT

LAN9353TI/PT - 3-Port Managed Ethernet Switch | Microchip

The Microchip Technology LAN9353TI/PT is a three-port managed Ethernet switch with integrated 10/100 Base-T/TX PHY connectivity and an I2C interface, packaged in a 64-lead TQFP with exposed pad measuring 10 x 10 mm. It combines three Ethernet ports, integrated 10/100 Mb/s transceivers, and host-facing configuration control in one compact surface-mount device. A managed Ethernet switch is an integrated networking component that connects multiple Ethernet endpoints through internal forwarding paths while providing controlled access to switch functions. In the broader product hierarchy, it belongs to Ethernet interface controllers, then network interface ICs, then integrated circuits used within embedded networking and industrial control systems. The primary features of the LAN9353 family include three managed Ethernet ports, 10/100 Base-T/TX physical-layer interfaces, and an I2C configuration interface. The manufacturer describes the family as optimized for consumer, embedded, and industrial electronic designs that require a highly integrated, cost-effective Ethernet switching solution. Its 10 x 10 mm TQFP package supports compact surface-mount construction. The LAN9353 architecture consolidates multiple 10/100 Ethernet ports, a managed switching function, and configuration access into one device. This integration can reduce the number of separate Ethernet interface components required in an embedded controller or industrial equipment design. The I2C interface provides a straightforward host-control path for configuring operating parameters and managing switch behavior from firmware. Typical uses include industrial controllers, embedded computing modules, consumer networking equipment, and systems requiring multiple Fast Ethernet connections. The integrated 10/100 Base-T/TX transceivers are suited to links operating at 10 Mb/s or 100 Mb/s, allowing one switch device to serve several local Ethernet nodes without requiring a separate PHY for every port. PCB design should preserve the exposed-pad land pattern and provide adequate thermal and layout continuity beneath the package. Follow the Microchip datasheet pin-description table, recommended decoupling network, and reference layout when assigning tracks. The I2C interface also requires correct pull-up implementation and signal-level compatibility with the host controller. This product summary combines the manufacturer's device positioning, interface and package details with practical selection guidance. It also distinguishes LAN9353-family options, identifies the information needed for drop-in sourcing, and highlights the design checks that matter when integrating a managed Ethernet switch into an embedded or industrial platform.

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LAN9354/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9354/ML

LAN9354/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip LAN9354/ML is a 3-port managed 10/100 Base-T Ethernet switch with an I2C interface, supplied in a 56-QFN 8 x 8 mm package. It integrates three Fast Ethernet switch ports and is application-optimized for consumer, embedded, and industrial electronic designs where network connectivity must be consolidated into a small-footprint controller. The verified distributor description identifies 10/100 Base-T, TX PHY, and I2C functionality. An Ethernet switch is a network-semiconductor device that connects multiple endpoints through a common switching fabric. A managed switch adds configuration, status, interrupt, and control capabilities rather than operating only as a transparent Layer-2 bridge. The LAN9354 family therefore sits between basic Ethernet PHYs, larger multi-port switches, and host-interface controllers used in embedded networking equipment. Verified features include three managed 10/100 Ethernet ports, a 3.3 V operating supply, wake-up support, power-up or reset configuration, non-volatile configuration storage, and interrupt generation. These functions support designs requiring controlled startup behavior, persistent configuration, and host-visible events. The 56-QFN package helps reduce board area while providing a high pin count for integrated Ethernet and control functions. The LAN9354/ML is suited to embedded systems, industrial controllers, networked peripherals, and compact communications equipment. Its managed-switch architecture can simplify the implementation of multiple Ethernet endpoints while preserving configuration flexibility. The I2C interface is relevant to embedded firmware because the host can use a serial control bus rather than allocating parallel management pins. A critical design consideration is that the exact electrical limits, pin names, exposed-pad connection, reference clock requirements, magnetic-interface components, and recommended layout constraints must be taken from the manufacturer datasheet. The verified data does not provide those details, so they are not guessed here. Use the official LAN9354 product page and datasheet for schematic, layout, and timing review. This page combines verified distributor and manufacturer information with explicit data gaps, practical application guidance, and sourcing references. It does not invent missing electrical specifications, pin assignments, or lifecycle claims.

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LAN9354I/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9354I/ML

LAN9354I/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9354I/ML is a 3-port 10/100 managed Ethernet switch with integrated 10/100 Base-T/TX PHYs, an RMII host interface, and I2C management in a 56-QFN 8 x 8 mm package. It is intended for compact embedded, industrial, and consumer networking designs that require multiple Fast Ethernet ports without implementing switch fabric and media-access control separately. A managed Ethernet switch is a network-semiconductor category that combines multiple physical-layer PHYs with frame handling, port management, and host connectivity. Within the broader hierarchy, the LAN9354I/ML is an Ethernet switch, an interface IC, a networking semiconductor, and ultimately an embedded connectivity solution. Its RMII interface connects the switch to a host processor, while I2C provides a management path for configuration and status access. The verified product information identifies three 10/100 Ethernet ports, RMII connectivity, and I2C interface support. The integrated PHY arrangement reduces the number of external Ethernet magnetics and line-driver subsystems required by a conventional discrete switch implementation. The 56-QFN 8 x 8 mm package also supports a relatively compact PCB footprint, although exposed-pad layout and thermal management must follow the manufacturer package guidance. The LAN9354I/ML belongs to Microchip's LAN9354 family of highly integrated, small-footprint, full-featured 3-port managed Ethernet switches. The family is positioned for cost-sensitive consumer, embedded, and industrial electronic designs where a system requires several 10/100 Base-T connections and management features but does not require Gigabit Ethernet throughput. Typical uses include industrial control gateways, embedded equipment with multiple Fast Ethernet service ports, console or test equipment, and compact network appliances. The RMII interface is particularly useful when the host processor already has a dedicated media-independent interface, while I2C management allows software or a controller to access switch registers. Exact supported features, register behavior, clocking requirements, and electrical limits must be confirmed in the manufacturer datasheet before layout. Designers should account for all 56 package terminals, the exposed thermal pad, differential Ethernet routing, magnetics or integrated PHY requirements, RMII timing, and the manufacturer's recommended decoupling network. Because the verified excerpts do not provide the complete pin map, clock frequencies, PHY electrical parameters, or full operating limits, these values should not be inferred from generic Ethernet-switch designs. This product record combines verified distributor pricing, package and interface facts, family-level alternatives, and application-specific engineering guidance. It also distinguishes confirmed data from unavailable specifications so procurement and design decisions can be checked against the current Microchip manufacturer documentation.

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LAN9354T/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9354T/ML

LAN9354T/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip LAN9354T/ML is a 3-port 10/100 managed Ethernet switch with an RMII host interface and I2C management, packaged in a 56-pin QFN (8x8 mm) with exposed pad, supplied in tray packaging. The device integrates three 10/100BASE-T/TX PHY/MAC ports, hardware-based management features, and a configurable EEPROM/SPI/host boot path so the same part serves consumer, embedded, and industrial Ethernet designs. An Ethernet switch is a physical-layer bridging device that takes frames from one port and forwards them to the appropriate output port based on MAC address lookup. A managed switch adds a control plane - here via I2C plus an optional web-based GUI - so the design engineer can configure port speed, auto-negotiation, VLAN tagging, QoS priority, port mirroring, and link aggregation from firmware rather than with external PHY chips. In the hierarchy, LAN9354T/ML sits as an interface IC (Ethernet switch controller) above the PHY level and below the network processor or MCU layer of an embedded system. Key features include three integrated 10/100 ports, RMII connectivity to a host processor for a copper PHY port, I2C-based register access for host or EEPROM configuration, support for both 10 Mbps and 100 Mbps links with auto-negotiation, and programmable options for boot-time configuration. Rated power dissipation is approximately 1.148 W, which makes copper pour area on the exposed thermal pad the dominant thermal design variable rather than a heat sink. Architecturally the LAN9354 combines a multi-port 10/100 MAC, an integrated switch fabric with per-port QoS and traffic prioritization, an RGMII/RMII-capable host-side data path, and an SMI/I2C register block. The RMII path reduces host pin count relative to MII by roughly half while still supporting full-duplex 100 Mbps operation, and the same 56-pin footprint consolidates PHY, MAC, and switch logic that would otherwise require three discrete PHYs plus an external switch ASIC. Typical applications include embedded Linux gateways, industrial HMI and PLC connectivity, USB-to-Ethernet and industrial serial-to-Ethernet bridges, IP camera and access-control peripherals, and networked embedded test equipment. The device is also used where a board needs to add two extra copper ports while keeping the host on a single RMII link. When designing around the LAN9354T/ML, budget input and output decoupling close to the supply pins, treat the exposed pad as the primary heat path, and confirm that the host processor exposes a compatible RMII interface at 50 MHz. Auto-negotiation and managed features should be validated against the target switch partner PHY, since switch-level link training and pause-frame handling differ from standalone PHY behaviour. This page consolidates verified distributor pricing, a drop-in alternative set for the 56-QFN footprint, and practical thermal and layout guidance that is not presented together in the original manufacturer material.

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LAN9355/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9355/ML

LAN9355/ML - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology LAN9355/ML is a highly integrated, 3-port managed Ethernet switch with three 10/100 Base-T/TX PHY interfaces, 10 Mbps and 100 Mbps support, and an I2C control interface in an 88-QFN 12 x 12 mm package. According to the verified distributor data, it is optimized for embedded networking designs and provides a compact Ethernet switching solution for consumer, embedded, and industrial equipment. An Ethernet switch is a network-interface semiconductor that receives frames on one port and forwards them to the appropriate destination port. A managed switch adds configuration and monitoring functions, allowing firmware or a host controller to control traffic behavior instead of relying only on automatic learning. The LAN9355/ML integrates the switching fabric, PHYs, management interface, and host-facing interfaces needed to connect several 10/100 Ethernet links on one PCB. The verified product information identifies support for 10 Mbps and 100 Mbps operation, an I2C interface, and a 1.8 V to 3.3 V supply range. The device also supports MII, RMII, and Turbo MII host-interface formats according to the distributor listing. These interfaces allow the Ethernet subsystem to connect to a microcontroller, application processor, or other network controller without implementing separate external PHYs for every port. The LAN9355/ML is intended for embedded systems that need compact multiport Ethernet connectivity. Typical uses include industrial control equipment, connected consumer products, embedded gateways, and host systems requiring two or more wired network ports. Its three-port architecture can connect internal devices to an upstream network while preserving an Ethernet interface for management or service traffic. Designers should pay close attention to the exact package pinout, required external magnetics or PHY integration details, clocking, transceiver layout, and the host-interface configuration specified by the manufacturer datasheet. The supplied search results confirm the LAN9355 family and LAN9355/ML package identity but do not provide complete electrical values, register details, timing limits, or a complete pinout table. Those parameters must be checked against the official Microchip datasheet before layout or production release. This page combines the verified manufacturer description, distributor package and interface details, sourcing links, and practical selection guidance. It distinguishes confirmed LAN9355/ML facts from data requiring direct datasheet confirmation rather than inferring specifications that were not present in the supplied sources.

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LAN9355/PT - 3-Port 10/100 Managed Ethernet Switch | Microchip
LAN9355/PT

LAN9355/PT - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip LAN9355/PT is a high-performance, small-footprint, fully-featured 3-port managed Ethernet switch with integrated 10/100 Base-T/TX PHYs and an I2C management interface, housed in an 80-pin TQFP-EP (12x12 mm) package with exposed thermal pad. It supports full-duplex and half-duplex operation, HP Auto-MDIX on all ports, and IEEE 1588 precision time protocol timestamping for time-sensitive applications. What is a managed Ethernet switch? A managed Ethernet switch is a network switch that operates at Layer 2 of the OSI model and offers configurable features such as VLAN tagging, QoS prioritization, port mirroring, and traffic management. Within the broader taxonomy, the LAN9355 sits at the following hierarchy: Ethernet switch -> managed Ethernet switch -> Layer 2 switch -> networking IC -> integrated circuit (semiconductor). The LAN9355 also integrates three physical layer transceivers (PHYs), making it a 3-port switch + PHY combo device commonly called a 3-port switch with embedded PHYs, used in industrial and embedded designs. Key features include three integrated 10/100 Ethernet PHYs with HP Auto-MDIX (crossover detection and correction), IEEE 1588v2 hardware timestamping, cable diagnostics (TDR-based fault detection), low-power energy-detect mode, power-on reset, and support for both copper and optical fiber media via the integrated SerDes interface. The device operates from a single 3.3V supply with 1.8V/2.5V tolerant I/Os and supports 100BASE-FX fiber connectivity. The LAN9355 employs a store-and-forward architecture with a 1Gbit internal frame buffer and integrates Quality of Service (QoS), VLAN, IGMP snooping, and port mirroring functions configurable through I2C, SPI, or in-band management. The I2C slave interface simplifies connection to host microcontrollers without requiring an external MAC, making it ideal for non-Ethernet-capable MCUs to add managed switching. Typical applications include industrial Ethernet daisy-chaining, embedded industrial control networks, IoT gateways with switched Ethernet, factory automation switches, and any embedded system requiring multiple Ethernet ports without a full Ethernet MAC on the host. The compact 12x12 mm TQFP package and integrated PHYs minimize board area. When designing with this device, ensure proper power decoupling with 0.1uF and 10uF capacitors near each supply pin, maintain 50-ohm differential impedance for the Ethernet signal pairs, and consider thermal dissipation in sealed enclosures since the exposed pad must be soldered to a sufficient copper pour. Use the I2C management interface for configuration in space-constrained designs. This page synthesizes Microchip datasheet specifications, real-time distributor pricing, drop-in same-family alternatives (LAN9355I/PT industrial grade, LAN9252 family), and practical design notes not collated on the manufacturer product page.

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LAN9355I/ML - 3-Port Managed Ethernet Switch | Microchip
LAN9355I/ML

LAN9355I/ML - 3-Port Managed Ethernet Switch | Microchip

Microchip Technology LAN9355I/ML is a high-performance, small-footprint, fully managed 3-port Ethernet switch for embedded, consumer, and industrial designs. It integrates 10/100 Base-T/TX Ethernet switching with an I2C interface, operates from a 1.8 V to 3.3 V supply, and is available in an 88-QFN 12 x 12 mm package with an exposed pad. Its industrial temperature range is -40°C to +85°C. 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.

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LAN9355I/PT - 3-Port Managed 10/100 Ethernet Switch | Microchip
LAN9355I/PT

LAN9355I/PT - 3-Port Managed 10/100 Ethernet Switch | Microchip

The Microchip Technology LAN9355I/PT is a highly integrated, three-port managed Ethernet switch supporting 10/100 Base-T/TX connectivity, MDI and MDIX cabling, and I2C host control. It is packaged in an 80-lead TQFP exposed-pad package measuring 12 mm by 12 mm and is identified as an industrial-temperature grade device. A managed Ethernet switch is a networking semiconductor that coordinates frame forwarding among multiple Ethernet ports while providing centralized control, status monitoring, and configuration functions. In the product hierarchy, it belongs to Ethernet interface controllers and embedded Ethernet switches, where it combines multiple physical-layer ports and switching logic into one compact device. This integration reduces the number of separate network components required in consumer, embedded, and industrial equipment. The LAN9355 family provides 10 Mbps and 100 Mbps Ethernet operation across three ports. Its interface options include MDI, MDIX, MII, MIIM, RMII, and Turbo MII, allowing the device to connect through copper Ethernet ports or interface with an external host processor. The I2C interface gives an embedded controller a management path for configuration and status functions rather than requiring dedicated discrete Ethernet hardware for each port. The LAN9355I/PT integrates three-port switching with multiple host-facing bus options, making it useful where a system must combine several wired network connections with an embedded processor. Its supported MDI and MDIX modes allow direct connection to both straight-through and crossover cabling arrangements, while automatic crossover support simplifies installation. The 12 mm by 12 mm exposed-pad TQFP also permits a comparatively compact PCB footprint without distributing three separate physical-layer interfaces across the board. Typical applications include industrial control equipment, embedded gateways, consumer appliances, test systems, and compact network interfaces. In an industrial controller, the switch can connect machine-network devices to a main processor while keeping port configuration under software control. In a consumer product, it can consolidate multiple 10/100 Ethernet connections behind a host using MII, RMII, or Turbo MII. It is also appropriate for embedded systems that require managed traffic prioritization rather than a simple two-port repeater. Designers should treat the exposed pad as a thermal and electrical connection to the PCB, not as an optional mechanical feature. Follow the Microchip LAN9355 datasheet for the exact land pattern, pin assignments, external magnetics requirements, clock requirements, and decoupling network. In particular, Ethernet implementations should follow the prescribed reference layout because controlled impedance, short return paths, isolation spacing, and component placement materially affect signal integrity and EMI performance. This page combines the verified product identity and package information with interface guidance, a focused engineering comparison, and practical implementation considerations. It is intended to help engineers determine whether the LAN9355I/PT fits a three-port embedded-network design and to plan sourcing through the Request a Quote form on this page.

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