ইন্টারফেস IC
উপশ্রেণী
পণ্য (3,100+)
KSZ8863RLL - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8863RLL is a cost-sensitive, power-efficient, highly integrated three-port 10/100 managed Ethernet switch with integrated PHYs and fiber support. The device is available in a 48-LQFP 7x7 mm package and is configured through I2C or SPI interfaces, as identified by the distributor listings and manufacturer product information. It is intended for low-port-count Ethernet systems requiring integrated copper and fiber connectivity. An Ethernet switch is a network-interface semiconductor that receives Ethernet frames on one port and forwards them to another port using address-based learning. The 10/100 designation refers to support for 10 Mbps and 100 Mbps Ethernet rates, while the three-port architecture consolidates multiple physical-layer connections into one device. In the system hierarchy, the KSZ8863RLL is an Ethernet interface IC, a network interface controller, and ultimately a communications semiconductor. The verified product information identifies the KSZ8863 family as a managed Ethernet switch with integrated 10/100 PHYs, I2C and SPI configuration interfaces, and fiber support. These capabilities allow a compact product to combine several network ports without requiring a separate switch controller and individual PHY devices. Its three-port organization is useful in industrial, embedded, communications, and edge-network equipment where a small number of Ethernet links must be managed efficiently. The KSZ8863RLL uses a 48-LQFP package measuring 7x7 mm according to the distributor listing. Package-level power, temperature, clock, and Ethernet-magnetics requirements must be confirmed in the manufacturer datasheet and KSZ8863RLL Hardware Design Checklist. Those documents are especially relevant to differential trace routing, magnetic-component placement, supply decoupling, and the reference-clock circuit. Typical deployments include three-port industrial Ethernet controllers, embedded network gateways, compact PLC communication modules, factory-floor connectivity, and OEM equipment requiring copper plus optional fiber links. The managed-switch architecture also makes the device suitable for systems that need more controlled network segmentation than an unmanaged repeater provides. For PCB implementation, preserve the pin assignments and reference-clock layout recommended by Microchip. The hardware checklist identifies pin 10 as the clock-circuit output and requires a capacitor to ground, while crystal, stray-capacitance, and load-capacitance values must be selected together. Ethernet magnetics, controlled-impedance routing, grounding, and isolation also require careful validation in the final board design. This page consolidates verified product identity, package information, pricing data, family substitutions, and practical hardware-design guidance. It also distinguishes documented KSZ8863 variants from unsupported replacement claims, helping engineers evaluate compatibility without treating every similar Ethernet switch as a true pin-to-pin substitute.
KSZ8863RLLI - 3-Port 10/100 Switch w/ RMII | Microchip
The Microchip Technology KSZ8863RLLI is a highly integrated 3-port 10/100 managed Ethernet switch with PHYs, supporting one RMII interface and packaged in a 48-pin LQFP (7x7 mm) for industrial temperature operation. It delivers 100 Mbps data rate per port, integrates three 10/100BASE-TX PHYs with on-chip termination, and provides a non-PCI CPU interface via I2C or SPI to a host processor. The device targets cost-sensitive, power-efficient industrial and embedded networking designs that need a small footprint, low port count managed switch. A managed Ethernet switch is a Layer 2 network device that uses a switch fabric to forward Ethernet frames between connected ports based on MAC address tables, while providing management features such as VLAN, QoS, port mirroring, and rate limiting. The KSZ8863RLLI sits in the hierarchy: Ethernet switch -> managed switch -> Layer 2 switch -> networking IC -> semiconductor. It is part of the IEEE 802.3 / 802.3u family of Fast Ethernet devices, supporting auto-negotiation per Clause 28 of the IEEE 802.3u specification. Key features include integrated 10/100BASE-TX PHYs with HP auto-MDI/MDIX (no external magnetics on the PHY side), support for fiber mode on Port 3, an RMII interface to an external MAC or host, an I2C/SPI host management interface, advanced power management including energy-detect mode, and 1.4 KB packet buffer per port. The device operates from -40C to +85C industrial temperature range. Architecture is built on a store-and-forward switch fabric with 1 Gbps total bandwidth, supporting wire-speed non-blocking forwarding on all three ports. The device includes IEEE 802.1Q VLAN, 802.1p QoS priority queues, port-based access control, and IGMP snooping for multicast filtering. The 48-pin LQFP package allows simple 4-layer PCB assembly using standard lead-free reflow. Typical applications include industrial Ethernet sensor networks, IP surveillance cameras with daisy-chained switch ports, building automation backbones, factory automation PLCs, and embedded IoT gateways requiring multiple Ethernet ports. The integrated PHYs and small package reduce BOM cost and PCB area versus discrete MAC+PHY solutions. When designing with this device, designers should follow the KSZ8863RLL Hardware Design Checklist from Microchip for crystal and magnetics selection. The 25 MHz reference clock drives the internal PHYs; PHY-to-MAC connection should use impedance-controlled traces per IEEE 802.3 100BASE-TX. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
KSZ8863RLLI-TR - 3-Port 10/100 Ethernet Switch w/ PHY | Microchip
The Microchip Technology KSZ8863RLLI-TR is an integrated 3-port 10/100 Mbps managed Ethernet switch with three on-chip PHYs, I2C and SPI host interfaces, and a 48-pin LQFP (7x7 mm) package. It is designed for cost-sensitive, low port-count, power-efficient switching systems, supports IEEE 802.3/802.3u, and provides advanced power management including Energy Efficient Ethernet (EEE) Actiphy and Wake-on-LAN. An Ethernet switch IC is a Layer-2 networking semiconductor that interconnects multiple Ethernet ports within a system, performing MAC address learning, frame forwarding, and QoS prioritization. The KSZ8863 belongs to the unmanaged/lightly-managed switch IC family within the broader Ethernet controller category, sitting alongside standalone PHY transceivers and full Layer-2+ managed switches in the network IC taxonomy. Compared to a discrete PHY plus MAC, an integrated switch-on-chip reduces board area, BOM, and power while adding hardware-based QoS. Key features include three integrated 10/100Base-TX PHYs with HP Auto-MDI/MDI-X, IEEE 802.1Q VLAN tagging support, QoS/priority queues with 802.1p, port-based rate limiting, and per-port cable diagnostics. The RLLI suffix indicates the LQFP-48 industrial-temperature variant (-40C to +85C) supplied in tape-and-reel packaging. The device operates from a single 3.3 V supply with typical power consumption around 0.5 W, and includes a 25 MHz reference clock input. Internally the KSZ8863 uses a store-and-forward architecture with a 1.5 Mbit shared packet buffer, supports RMII for an external MAC or uplink port, and offers PHY loopback for diagnostics. The integrated PHYs include on-chip termination resistors and adaptive equalization, simplifying magnetics selection. Typical applications include industrial Ethernet daisy-chaining, IP cameras and surveillance switches, building automation gateways, factory-floor sensor aggregation, automotive Ethernet gateway modules, and any embedded system that needs a small, low-power 3-port switch. When designing with the KSZ8863RLLI-TR, follow the KSZ8863RLL Hardware Design Checklist for magnetics, RBIAS resistor, and 25 MHz crystal layout. Use short, impedance-controlled 100-ohm differential traces between the PHY outputs and the magnetics, and provide adequate bulk decoupling on each AVDD supply pin. This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes that are not found in the manufacturer datasheet alone, helping embedded network designers select and source the right switch IC for their application.
KSZ8864CNXC - 4-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8864CNXC is a highly integrated, Layer 2-managed 4-port 10/100 Mbps Ethernet switch with two MAC interfaces supporting MII or RMII operation, packaged in a 64-QFN 8 x 8 mm package. The device is intended for cost-sensitive embedded networking systems that require multiple Fast Ethernet ports in a compact surface-mount footprint. An Ethernet switch is a network-interface IC that forwards Ethernet frames between connected devices and an upstream controller or network segment. The KSZ8864 belongs to the managed switch, Ethernet interface controller, network interface IC, and semiconductor hierarchy. Its Layer 2 management function provides controlled frame handling at the edge of an embedded network rather than requiring a separate bridge or complex external switching hardware. Key characteristics include four integrated 10/100 Base-T/TX ports, two MACs with selectable MII or RMII interfaces, on-chip termination, low power consumption, and a 64-QFN package measuring 8 x 8 mm. These characteristics make the device suitable where space, interface count, and system cost are important constraints in industrial, automotive, communications, and embedded-control products. Technically, the KSZ8864 combines four Fast Ethernet PHYs with managed Layer 2 switching functions and host-facing MAC interfaces in one package. MII provides a parallel interface with separate data paths, while RMII reduces the number of required host-interface signals. The two MACs support designs that need more than one upstream or management connection. According to the Microchip KSZ8864CNX/RMNUB datasheet, the family includes on-chip termination to reduce external component count and support compact 10/100 Mbps switch systems. Typical applications include industrial Ethernet gateways, vehicle network interfaces, embedded routers, serial-to-Ethernet equipment, industrial controllers, set-top networking, and compact embedded access systems. The device is especially relevant when a design needs four Fast Ethernet ports, two host interfaces, managed Layer 2 behavior, and a small package on the same PCB. The primary design consideration is interface and power planning. The PCB must route MII or RMII signals according to the selected host-interface mode, provide appropriate decoupling, and preserve controlled-impedance paths where timing or EMI performance matters. Because this is a digital interface IC rather than a power semiconductor, a Safe Operating Area chart is not applicable. This product overview combines the manufacturer’s switch description, verified package and interface facts, replacement analysis, and practical implementation guidance. It also distinguishes the base device from automotive and temperature-grade ordering variants that can share the same 64-QFN footprint but serve different qualification requirements.
KSZ8864CNXI - 4-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8864CNXI is a highly integrated, Layer 2 managed four-port Ethernet switch with 10/100 Mbps ports, two MAC interfaces, and MII or RMII host connectivity in a 64-QFN package measuring 8 mm by 8 mm. It supports cost-sensitive 10/100 Mbps switch systems while integrating on-chip termination and a compact footprint for space-constrained embedded networking equipment. An Ethernet switch is a Layer 2 network semiconductor that forwards Ethernet frames between multiple physical ports according to MAC addresses. The KSZ8864 family belongs to the hierarchy of Ethernet interface controllers, network interface controllers, integrated circuits, and semiconductors. Its four-port managed architecture allows one embedded processor to connect through two MAC interfaces while the switch handles traffic between attached nodes, reducing the number of physical network interfaces required by the host system. The KSZ8864 supports 10/100 Mbps operation and provides MII and RMII interfaces for connection to a network processor, microcontroller, or application-specific processor. MII offers separate parallel paths for transmit and receive data, while RMII uses a reduced pin interface suitable for designs where connector count and board area are important. The manufacturer describes the family as optimized for cost-sensitive switch systems, with on-chip termination, low power consumption, and a small package intended to reduce system cost. The device integrates two MAC interfaces and four Ethernet ports in one network IC. This consolidation can shorten the design path for industrial control, automotive networking, embedded appliances, communications equipment, and network bridges. The KSZ8864 family is listed by the manufacturer as AEC-Q100 automotive qualified, although orderable suffix and grade details should be confirmed for each specific package configuration before use in a production vehicle design. Typical Ethernet designs use the KSZ8864 as the central Layer 2 switching element, with external magnetics and RJ45 or other network connectors on the port side. The host processor connects through one of the MII or RMII interfaces. Configuration and status information can be handled through the management interface, allowing firmware to control port parameters and monitor link state. Network isolation, instrumentation, and embedded service-port products are also natural fits because four ports can replace several discrete Ethernet interface arrangements. When designing around the KSZ8864CNXI, preserve the manufacturer’s recommended decoupling and layout guidance and account for the exposed-pad thermal and electrical requirements of the 64-QFN package. Keep Ethernet differential routing controlled, provide the specified clocking and interface voltage levels, and verify MII or RMII signal timing at the host boundary. The MII and RMII options are not automatically interchangeable; the host SoC, clock architecture, and PCB design must support the selected interface. This product page consolidates the manufacturer’s device identity, package information, interface capabilities, application guidance, cross-reference findings, and engineering-oriented comparison data. It also identifies where a strict, board-compatible drop-in substitute is not established, helping engineers make sourcing decisions without confusing a related ordering suffix with a functionally different switch.
KSZ8864RMN - 4-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8864RMN is a highly integrated, Layer 2 managed four-port 10/100 Mbps Ethernet switch with two MAC interfaces, supplied in a 64-QFN 8 mm by 8 mm package. The device combines four Fast Ethernet PHYs, media access control units, a non-blocking switch fabric, address lookup engine, and an on-chip frame buffer into one compact network interface solution. An Ethernet switch is a semiconductor that connects multiple physical network ports and forwards Ethernet frames between them. The KSZ8864RMN belongs to the interface-controller hierarchy: Ethernet switch, Layer 2 network controller, network interface IC, and integrated circuit. Its managed architecture supports cost-sensitive industrial, automotive, communications, and embedded Ethernet systems while reducing the number of external discrete components required for four-port copper networking. The principal features include four 10/100 Mbps copper ports, two MII or RMII MAC interfaces, a high-speed non-blocking switch fabric, and on-chip frame buffering. According to the manufacturer datasheet, the switch fabric has 1.4 Gbps memory bandwidth. The device also uses enhanced mixed-signal technology in its PHYs and integrates on-chip termination, helping reduce external circuit requirements. A dedicated address lookup engine handles frame-forwarding decisions within the integrated Layer 2 switch. The KSZ8864RMN combines PHY, MAC, switching, and memory functions in one 64-QFN package. This integration can shorten the design path for embedded equipment requiring four copper Ethernet ports, while the dual MAC interfaces allow the switch to operate alongside a host processor or another network controller. Because it is a managed Layer 2 switch, designers should configure forwarding, filtering, and related behavior through the supported management interface rather than treating it as an unmanaged bridge. Typical applications include industrial Ethernet controllers, automotive infotainment or networking modules, factory equipment, building automation, communications equipment, and embedded gateways. The four-port configuration is particularly useful where a single host must connect to multiple 10/100 Mbps devices. For systems using newer infrastructure, the 10/100 Mbps capability remains relevant for legacy copper links but does not provide gigabit Ethernet throughput. Designers should preserve the exact Microchip reference layout, verify thermal performance across the required ambient range, and confirm management firmware and host-interface timing before release. The 8 mm by 8 mm exposed-pad package requires adequate PCB copper and reflow control. Although the KSZ8864 family has documented functional drop-in replacements, engineers must verify device-specific ordering codes, temperature grades, and firmware behavior before substitution. This product summary combines manufacturer documentation, distributor listings, package information, and verified family cross-reference data. It also identifies same-package drop-in candidates and highlights the practical verification points that are not apparent from a distributor headline alone.
KSZ8864RMNI - 4-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8864RMNI is a highly integrated, Layer 2 managed 4-port Ethernet switch with four 10/100 Fast Ethernet PHYs, two MAC interfaces, I2C and SPI control, and an 8 x 8 mm 64-QFN package. It is designed for cost-sensitive industrial networking products that require four 10/100 Mbps copper Ethernet ports in a compact surface-mount footprint. An Ethernet switch is a Layer 2 network device that receives Ethernet frames on one port, examines the destination MAC address, and forwards traffic to the appropriate port or switch fabric. A managed switch adds programmable features such as port configuration, address learning, VLAN support, traffic prioritization, and link status monitoring. The KSZ8864RMNI combines those functions with integrated PHYs and host interfaces, reducing the number of external components required in industrial Ethernet equipment. The KSZ8864RMN family provides patented and enhanced mixed-signal technology, media access control units, a high-speed non-blocking switch fabric, a dedicated address lookup engine, and on-chip frame-buffer memory. The two MAC interfaces can use MII or RMII, while the integrated I2C and SPI interfaces support host configuration and control. These features make the device suitable for industrial controllers, embedded network bridges, factory automation equipment, and compact Ethernet gateways. The KSZ8864RMNI is the industrial-temperature version of the KSZ8864RMN family, specified for operation from -40 C to +85 C. A separate automotive-qualified AEC-Q100 version is identified as KSZ8864RMNU in the manufacturer documentation. The KSZ8864 family is intended for 10/100 Mbps networks and emphasizes a small package size, integrated PHYs, and flexible CPU control interfaces. For a new design, use the manufacturer datasheet for the complete pin description, register map, electrical limits, crystal requirements, and reference schematic. Preserve the recommended Ethernet magnetics, clock, decoupling, and controlled-impedance layout. When replacing an existing device, verify package dimensions, exposed-pad treatment, strap resistors, PHY addressing, and the required MII/RMII clock configuration before confirming a drop-in replacement. This page combines the manufacturer's product information with practical design guidance, drop-in candidate analysis, application context, and a parameter comparison. The comparison is intended to accelerate engineering review while preserving the need to validate timing, thermal behavior, regulatory requirements, and production details against the latest manufacturer documentation.
KSZ8864RMNU - 4-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8864RMNU is an automotive-qualified, highly integrated Layer 2 managed Ethernet switch with four 10/100 Mbps ports, MII and RMII host interfaces, and a 64-pin QFN package measuring 8 x 8 mm. The device supports an aggregate switching throughput of 1400 Mbps and is designed for compact, cost-sensitive Ethernet equipment. An Ethernet switch is a networking semiconductor that connects multiple Ethernet nodes through one physical device and forwards frames according to Layer 2 MAC addresses. The KSZ8864 belongs to the managed Ethernet switch category, combining four integrated 10/100 Base-T/TX ports with interfaces for a host processor or network controller. This integration reduces board area, external PHY count, and system complexity in embedded networking designs. Key features include four 10/100 Mbps Ethernet ports, a Layer 2 managed-switch architecture, support for MII and RMII interfaces, and AEC-Q100 automotive qualification. Its 1400 Mbps aggregate switching capacity is appropriate for Fast Ethernet equipment carrying standard 10/100 traffic. A 64-pin QFN package with an exposed pad supports compact surface-mount layouts while providing a thermal and ground connection beneath the device. The KSZ8864RMNU is optimized for embedded systems that require several Fast Ethernet ports without the size or cost of a discrete multi-PHY implementation. Two integrated PHYs and two MAC interfaces divide connectivity between external network ports and the processor-facing side of the design. MII compatibility supports a parallel host interface, while RMII reduces host-side pin requirements when paired with a compatible Ethernet controller or processor. Typical applications include automotive infotainment systems, industrial Ethernet controllers, embedded routers, network appliances, IP cameras, and compact communications equipment. The AEC-Q100 qualification is particularly relevant to automotive platforms requiring a managed Ethernet switch with a small footprint and integrated Fast Ethernet ports. Industrial and commercial products can also use the device where MII or RMII host connectivity is preferred. Designers should follow the manufacturer’s KSZ8864CNX/RMNUB Hardware Design Checklist when assigning RJ45 magnetics, line-side termination, supply connections, exposed-pad layout, and clock requirements. Because the target KSZ8864RMNU is listed as obsolete, a replacement should be checked against the pin-compatibility table in the Microchip replacement notice before schematic and PCB changes are approved. This product page combines the verified device identity, package details, lifecycle information, manufacturer documentation, and the manufacturer-supported replacement path with practical networking and layout guidance. It helps engineers identify the obsolete MPN, evaluate the documented functional replacement, and determine whether existing hardware can remain unchanged.
KSZ8873FLL - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8873FLL is an integrated 3-port 10/100 Mbps managed Ethernet switch with 100BASE-FX support, I2C and SPI control interfaces, and one MII interface in a 64-LQFP 10 x 10 mm package. It is designed for cost-sensitive, low-port-count, power-efficient Ethernet switching systems. An Ethernet switch is a network-semiconductor device that connects multiple Ethernet ports and forwards frames between them. The KSZ8873FLL combines three Fast Ethernet ports, integrated PHYs, switch-management functions, CPU access, and 100BASE-FX capability on one IC. This integration can reduce component count and simplify PCB layouts compared with discrete PHY and switching arrangements. Verified product information identifies two 100BASE-FX ports and an I2C/SPI management interface. The device also provides port-based and tag-based VLAN support, QoS priority handling, one MII interface, and CPU control and data interfaces. Its 3-port architecture suits embedded systems requiring a small number of wired network connections rather than a high-port-count enterprise switch. The KSZ8873FLL is a managed switch rather than a basic unmanaged switch. Management features allow a host processor to configure the switching fabric, addressing, VLAN behavior, and traffic priority through the available control interfaces. The separate MII interface offers a connection to an external network processor or controller when the system architecture requires centralized traffic handling. Typical uses include industrial Ethernet equipment, embedded control systems, factory automation, telecom access hardware, and compact network-interface modules. The 100BASE-FX capability is particularly relevant where copper Ethernet reach is insufficient and optical-fiber links are preferred. Implementations should still validate magnetic-component isolation, fiber transceiver selection, thermal margin, and the complete switch-management configuration in the target system. The primary engineering consideration is that KSZ8873FLL is a pin-compatible device within the KSZ8873 family but not a universal Ethernet-switch replacement. Board designers must verify the exact package, supported PHY/fiber configuration, management firmware expectations, operating-temperature grade, and supported supply rails before substitution. This page combines verified manufacturer and distributor information, same-family drop-in options, and practical selection guidance.
KSZ8873FLLI - 3-Port 10/100 Managed Ethernet Switch | Microchip Technology
The Microchip Technology KSZ8873FLLI is an integrated 3-port 10/100 Mbps managed Ethernet switch with integrated PHYs, including 100 Base-FX support, I2C, and SPI interfaces in a 64-LQFP package measuring 10 x 10 mm. It supports supply voltages of 1.8 V, 2.5 V, and 3.3 V, with an operating supply range of 2.375 V to 3.465 V. A managed Ethernet switch is a network-semiconductor device that combines multiple physical-layer interfaces, frame handling, and local configuration control into one integrated circuit. The KSZ8873 family is designed for compact, low-port-count, cost-sensitive, and power-efficient 10/100 Mbps switch systems. Its three-port architecture can support copper Ethernet connections alongside a fiber-oriented 100 Base-FX interface when the required external magnetics and line-side implementation are included. Key device characteristics include three integrated 10/100 network ports, 100 Base-FX PHY capability, MII interfacing, and configuration access through I2C or SPI. The KSZ8873FLLI operates across a -40 °C to +85 °C temperature range, making it suitable for industrial equipment, communications equipment, embedded systems, and controlled networking products. The 64-LQFP package provides a standardized surface-mount footprint for industrial and embedded PCB designs. The device is designed to reduce the component count required for a small managed Ethernet switch. Integrated PHYs simplify the connection between the switch core and external magnetics, while I2C and SPI provide alternative management paths for system-level configuration. The MII interface can be used with an external network processor or controller when the system architecture requires frame handling outside the switch IC. Typical applications include industrial Ethernet gateways, serial-to-Ethernet equipment, embedded network controllers, communications equipment, and compact Ethernet switches. Designers should confirm the required port mix, fiber or copper media support, external magnetics, management interface, and supply sequencing before finalizing the PCB layout. Use the manufacturer pin-description table and application schematics when assigning tracks and selecting bypass components. This page organizes the KSZ8873FLLI's verified electrical, package, interface, environmental, and management information, alongside practical design guidance and related KSZ8873 family choices. The comparison focuses on functional differences among the documented 64-LQFP family members rather than assuming that every similarly named Ethernet switch is interchangeable.
KSZ8873MLL - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip KSZ8873MLL is a highly integrated three-port 10/100 Mbps managed Ethernet switch with integrated PHYs, a 1.8 V to 3.3 V supply range, an MII host interface, and a 64-LQFP package measuring 10 mm by 10 mm. It is designed for compact, power-efficient, low-port-count Ethernet systems. An Ethernet switch is a semiconductor device that connects multiple physical-layer network ports and manages frame forwarding between them. The KSZ8873 belongs to the Ethernet switch controller hierarchy: three-port managed switch, Ethernet interface IC, network interface, and semiconductor. Compared with discrete Ethernet implementations, its integrated PHYs reduce board area while supporting standardized 10 Mbps and 100 Mbps data rates. The verified manufacturer information identifies three Ethernet ports, 10/100 Mbps operation, low power consumption, and an MII interface. Available specifications also identify 1.8 V, 2.5 V, and 3.3 V supply operation and a 0°C to +70°C temperature range for KSZ8873MLL. These characteristics make the device relevant to embedded network equipment, industrial controllers, embedded Linux systems, and compact Ethernet access products. Technically, the KSZ8873 combines three integrated 10/100 network interfaces with switch-management logic. Its 1.8 V to 3.3 V operating range accommodates systems using 1.8 V, 2.5 V, or 3.3 V power rails, while the MII interface provides a standardized connection to a host controller or processor. The manufacturer describes the family as a cost-sensitive, low-port-count solution for power-efficient 10/100 Mbps switch systems. Typical applications include embedded Linux gateways, industrial Ethernet controllers, printer and copier network interfaces, embedded industrial equipment, and compact network appliances. In each case, the three integrated ports permit local connectivity without requiring three separate external Ethernet PHYs. The MII interface is particularly useful where the system processor already provides Ethernet MAC functionality. Designers should verify the exact MII signal mapping, clock requirements, crystal options, reference circuit, and thermal conditions against the complete Microchip datasheet before layout release. Because the switch includes magnetic-interface PHY circuitry, its layout guidance for magnetics, termination, power decoupling, and high-speed signal integrity should be followed closely rather than treating the package as a generic low-speed controller. This page consolidates the verified manufacturer, distributor, and substitution information for KSZ8873MLL, including pricing context, same-family drop-in candidates, comparison parameters, and practical design considerations. The alternatives and notes provide engineering context beyond a basic distributor specification table, while unresolved electrical details are explicitly identified instead of being estimated.
KSZ8873MLLI - 3-Port 10/100 Ethernet Switch | Microchip
Microchip KSZ8873MLLI is a highly integrated 3-port managed Ethernet switch with integrated 10/100 PHYs, an MII interface, and I2C and SPI management interfaces in a 64-pin PQFP package measuring 10 x 10 mm. It is designed for cost-sensitive, power-efficient, low-port-count Ethernet systems operating at 10/100 Mbps. A managed Ethernet switch is a network interface IC that combines multiple physical-layer transceivers, frame handling, port management, and configuration logic on one semiconductor. Within the broader hierarchy, the KSZ8873MLLI is an Ethernet switch, managed switch, network interface IC, and integrated circuit. This integration reduces the component count required for a small three-port Ethernet node while allowing software-controlled configuration and status monitoring. The device provides three 10/100 Ethernet ports with integrated PHYs. According to the Microchip KSZ8873 product page, the KSZ8873MML, MLL, FLL, and RLL versions target low-port-count, cost-sensitive, and power-efficient 10/100 Mbps switch systems. The MLL variant used by KSZ8873MLLI supports an MII connection and can be managed through I2C or SPI, making it suitable for embedded control systems that need configurable Ethernet ports without a separate switch controller. The 64-PQFP package provides 64 electrical positions for the three integrated PHYs, management interfaces, clocks, power rails, resets, indicators, and auxiliary I/O. Because the package exposes a substantial number of mixed-signal and digital functions, careful partitioning of analog supply, digital supply, and ground connections is important for stable operation. Decoupling should be placed directly beside the relevant supply pins, while high-speed Ethernet traces require controlled impedance and minimized crosstalk. Typical applications include industrial Ethernet gateways, embedded control systems, factory-automation equipment, IoT controllers, networked sensors, industrial HMI panels, and compact embedded platforms that require three Fast Ethernet ports. The integrated PHY architecture is especially useful where board area and external component count are more important than multi-gigabit performance. Designers should verify the exact MLL pinout, internal bonding configuration, supply sequencing, and supported operating mode before committing a PCB layout. Microchip states that the KSZ8873 RLL, MLL, and FLL versions are not interchangeable because their internal bonding differs, and the operating mode cannot be changed through an external pin or register setting. Firmware must therefore configure the device strictly as an MLL part. This page consolidates the manufacturer product description, interface and package details, sourcing information, substitution constraints, and practical integration guidance. It also distinguishes the MLL implementation from related KSZ8873 versions so engineers can avoid an electrically similar but mechanically and functionally unsuitable substitution.
KSZ8873MML - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip KSZ8873MML is a highly integrated 3-port 10/100 Mbps managed Ethernet switch with integrated PHYs, two MII interfaces, and SPI/I2C management in a 64-pin LQFP package measuring 10 x 10 mm. The device targets compact, low-port-count networks requiring integrated switching, advanced power management, and QoS support. An Ethernet switch IC is a semiconductor that connects multiple network nodes, forwards Ethernet frames according to learned MAC addresses, and provides a shared physical network interface. In the product hierarchy, the KSZ8873MML is a managed Ethernet switch with PHY, which belongs to the broader Ethernet interface IC and network-interface semiconductor categories. The verified product information identifies three 10/100 Mbps switch ports, integrated Ethernet PHYs, and configuration through I2C or SPI. Two MII interfaces allow the switching fabric to connect with an external network processor or FPGA. Low power consumption and advanced power management suit cost-sensitive embedded systems, while sophisticated QoS features include IPv6 priority classification. The KSZ8873 family is designed for low-port-count 10/100 Mbps systems where a separate switching chip and multiple physical-layer devices would increase board area, component count, and power consumption. Its 64-LQFP package integrates the network-facing functions, but the two MII paths provide additional integration flexibility for designs requiring host connectivity. Typical applications include industrial Ethernet gateways, embedded network controllers, factory equipment, security systems, and compact communication appliances. A design can connect two copper Ethernet PHYs through the switch while using an MII connection to a host processor. The integrated PHYs reduce external component requirements, and the managed interface allows firmware to configure ports and traffic behavior. Designers should verify the complete MML pinout, clock requirements, magnetics implementation, and power-supply sequencing against the manufacturer datasheet before layout. The MML bonding configuration is specifically not interchangeable with the RLL or FLL variants, so PCB substitution without a manufacturer-supported pinout comparison is not safe. This product record combines verified manufacturer and distributor information with structured application guidance, engineering caveats, and compatibility analysis. It highlights the practical distinction between functional alternatives and true pin-compatible drop-in replacements rather than treating similarly named KSZ8873 variants as interchangeable.
KSZ8873MMLI - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8873MMLI is a highly integrated three-port Ethernet switch with integrated 10/100 Mb/s PHYs, managed-switch features, and two MII interfaces in a 64-pin LQFP package measuring 10 mm by 10 mm. It is designed for compact, cost-sensitive, power-efficient 10/100 Mb/s switching systems and supports cable diagnostics, programmable LED indication, low-power operation, MII, and RMII. An Ethernet switch is a network-interface device that connects multiple endpoints through one or more internal ports and determines where each frame should be forwarded. Within the network hierarchy, the KSZ8873MMLI combines Ethernet switching, physical-layer transceivers, and host-facing management interfaces in a single integrated circuit. This integration reduces the number of separate interface components required in small industrial, automotive, and embedded Ethernet designs. The primary headline capabilities are three 10/100 Mb/s switch ports, integrated PHYs, and two MII interfaces. The 64-pin LQFP package provides 64 physical connections for power, Ethernet interfaces, management signals, clocking, and configuration functions. According to the manufacturer product page, the KSZ8873 family is intended for low-port-count, cost-sensitive, power-efficient switch systems rather than high-port-count enterprise switching. Management and diagnostics distinguish the KSZ8873 from a basic unmanaged switch. Its cable-diagnostics feature supports fault analysis on copper links, while programmable LED indication allows port activity or link status to be presented through the device's LED controls. The family also supports MII and RMII, allowing it to interface with Ethernet controllers using either parallel management-oriented signals or the reduced pin-count RMII convention. Typical uses include compact embedded Ethernet switches, automotive Ethernet connectivity, industrial control networks, and communication equipment requiring three integrated 10/100 Mb/s ports. The automotive-rated 200 Mb/s variant is suited to cost-sensitive vehicle-network designs where multiple Fast Ethernet links must be consolidated without using a large backplane switch. Designers should confirm the exact pin functions, clock requirements, interface mode, and external component requirements from the manufacturer datasheet before layout. MII and RMII are not automatically interchangeable at the board level, and the two MII interfaces on this device require careful signal and clock routing. This page combines the family-level functional information with the exact KSZ8873MMLI package identity, sourcing guidance, design notes, and an explicit treatment of replacement constraints. It also distinguishes confirmed product facts from engineering information that still requires validation against the manufacturer documentation.
KSZ8873RLL - 3-Port 10/100 Managed Switch | Microchip
The Microchip Technology KSZ8873RLL is an integrated three-port 10/100 Mbps managed Ethernet switch with integrated PHYs, I2C and SPI interfaces, MII and RMII connectivity, and a 64-pin LQFP package measuring 10 mm by 10 mm. It is designed for compact, power-efficient, low-port-count networking systems operating from 2.5 V and 3.3 V supplies. An Ethernet switch is a network-interface semiconductor that connects multiple physical-layer ports and forwards Ethernet frames according to destination addresses. The KSZ8873RLL belongs to the managed-switch hierarchy: Ethernet switch, network interface controller, interface IC, and semiconductor. Its integrated PHYs reduce board space and external component count in cost-sensitive equipment that does not require a high-port-count switching fabric. Key features include three integrated 10/100 Mbps ports, support for 10/100BASE-T/TX applications, and configuration through I2C or SPI. The available source data identifies both MII and RMII interfaces, allowing the device to serve systems using a parallel media-independent interface or the more compact reduced MII. Its stated operating-temperature range is 0°C to +70°C, which targets commercial equipment rather than extended industrial or automotive environments. The KSZ8873RLL combines three Ethernet ports in one small-footprint IC, reducing the need for separate PHY components and board routing. A 100 Mbps data rate suits legacy Fast Ethernet infrastructure, embedded control networks, industrial equipment, and cost-sensitive network interfaces where full Gigabit Ethernet throughput is unnecessary. Manufacturer information describes the device as a power-efficient 10/100 Mbps switch system solution. Typical uses include compact Ethernet switches, embedded network bridges, industrial control equipment, set-top and consumer networking products, and systems requiring one Fast Ethernet uplink plus internal switched ports. Its I2C and SPI configuration paths can support host processors that need programmable switch behavior without dedicating many host GPIO pins. Designers should verify the exact MII or RMII configuration, reference-clock arrangement, magnetics interface, and exposed-pad connection against the manufacturer datasheet before layout. Place the 164-ohm clock-termination resistors near the device when the reference-design guidance calls for them, and change the suggested value to 33 ohms when PHY MII mode is selected. This page consolidates the verified manufacturer and distributor details, documents supported family substitutions, compares package and functional characteristics, and adds implementation guidance that is not presented as a single combined summary in the original search results.
KSZ8873RLLI - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8873RLLI is a highly integrated three-port managed Ethernet switch with integrated 10/100 Base-T/TX PHYs, supporting data rates up to 100 Mbps and operating from 1.8 V, 2.5 V, or 3.3 V supplies. The device combines an Ethernet switch, three physical-layer interfaces, and host-control connectivity in a compact LQFP-48 package. Its interface options include I2C, SPI, and RMII, allowing it to suit embedded network equipment, industrial controllers, and cost-sensitive Ethernet systems. An integrated managed Ethernet switch connects multiple physical-layer ports through one switching engine, reducing the need for discrete PHYs, magnetics interfaces, and separate switch controllers. The KSZ8873 series is positioned for low-port-count, power-efficient 10/100 Mbps networks where three integrated PHYs provide a compact bridge between copper Ethernet interfaces and a host processor or embedded control system. Key features include three integrated 10/100 Ethernet ports, operation at up to 100 Mbps, a typical 115 mA supply current, and support for 1.8 V, 2.5 V, or 3.3 V supply levels. The combination of I2C and SPI host interfaces supports configuration access from embedded processors, while the RMII interface provides a dedicated connection to a network controller. The LQFP-48 package supports conventional surface-mount assembly and thermal copper-area integration. The device uses a mixed 1.8 V, 2.5 V, and 3.3 V supply architecture, allowing system designers to align core and interface voltage domains. A 115 mA typical operating current is particularly useful for compact embedded platforms where the Ethernet function must coexist with power-limited processors and sensors. The three integrated PHYs also reduce board area by consolidating three copper-network interface sections into one switching IC. Typical applications include industrial Ethernet gateways, embedded control systems, set-top and network appliances, instrumentation platforms, and low-cost Ethernet bridges. The switch is especially useful when a board needs several 10/100 ports but a higher-speed multi-gigabit switching architecture would add unnecessary cost, power, and complexity. Designers should account for the specified operating temperature of -40°C to +85°C and verify every power rail against the manufacturer's recommended sequencing and decoupling requirements. Ethernet magnetics, center-tap capacitors, impedance-controlled differential pairs, and connector layout remain essential even when the PHY and switch functions are integrated into one package. This product overview combines port, interface, voltage, packaging, and lifecycle information with application guidance and engineering selection notes. It also identifies the strength and limitations of available drop-in alternatives, helping engineers validate footprint compatibility, operating conditions, and host-interface requirements before making a PCB or sourcing decision.
KSZ8893FQL - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology KSZ8893FQL is a highly integrated single-chip three-port Fast Ethernet switch with fiber support, three MAC units, a non-blocking switch fabric, and integrated 10/100 transceivers. It supports copper and fiber media conversion, with 10/100 Base-T/TX and 10/100 Base-FL/SX connectivity, and is packaged in a 128-pin PQFP measuring 14 mm by 20 mm. An Ethernet switch is a Layer 2 network-semiconductor device that receives Ethernet frames on one port, processes them through a switching fabric, and forwards them to another port. The KSZ8893FQL belongs to the managed Ethernet switch hierarchy, combining media access control, physical-layer transceivers, and switching functions for industrial, communications, and embedded network equipment. Key features include support for two 10/100 copper transceivers, fiber connectivity, three MAC units, a non-blocking switch fabric, and a Layer 2 managed-switch architecture. The KSZ8893FQL supports IEEE 802.3u auto-negotiation, allowing link partners to select a common operating mode. Its single-ended fiber-module connections are identified as TXM1 on pin 49 and RXM1 on pin 46. Technically, the device combines mixed-signal low-power Ethernet transceivers with frame-buffer and switching resources. The supplied manufacturer documentation describes TS-1000 Operations, Administration and Maintenance support, while the product listing identifies both I2C and SPI management interfaces. These capabilities position it for low-port-count systems requiring copper-to-fiber media conversion or managed Layer 2 connectivity. Typical uses include industrial Ethernet bridges, serial-to-Ethernet equipment, embedded control networks, factory automation gateways, and compact optical media converters. In a copper-to-fiber link, the switch can bridge a 10/100 Base-T network segment to a 100BASE-FL or 100BASE-SX module without requiring a separate external Ethernet switch. Designers must account for the large 128-pin PQFP footprint, provide suitable fiber-interface circuitry for the selected optical module, and validate management firmware against the supported register set. Availability, operating-temperature grades, EMC performance, and some electrical limits should be confirmed from the manufacturer datasheet before production release. This product page combines verified manufacturer and distributor information with application guidance, comparison data, and design considerations that help engineers evaluate the KSZ8893FQL for managed Fast Ethernet and fiber-conversion designs.
KSZ8893MBL - 3-Port 10/100 Managed Switch | Microchip
The Microchip Technology KSZ8893MBL is a 3-port 10/100 Mbps managed Layer 2 Ethernet switch with integrated PHYs, available in a 100-pin LFBGA package and configured through I2C or SPI interfaces. It supports 10/100 Base-FX, Base-T, and Base-TX connectivity, providing a compact solution for low-port-count, cost-sensitive Ethernet systems. An Ethernet switch is a networking semiconductor that receives Ethernet frames on one port and forwards them to the appropriate destination port. The KSZ8893 belongs to the managed-switch hierarchy, where Layer 2 switching is combined with traffic-management functions rather than basic frame replication. Its management capabilities include rate limiting, tag- and port-based VLAN support, QoS priority, MIB counters, and CPU control and data interfaces. The KSZ8893MQL and KSZ8893MBL versions integrate three 10/100 Ethernet PHYs with a managed switching engine. Supporting RMII, MII, and SNI interfaces allows connection to a host processor or network controller. I2C and SPI host interfaces provide access to configuration and status registers, while frame buffers support the managed-switch architecture. These functions make the device suitable for compact industrial, embedded, and communications equipment requiring three Ethernet ports without a discrete switch ASIC. The KSZ8893MBL is particularly useful where port count is intentionally low and board area is constrained. Its 100-LFBGA package supports dense multilayer layouts, but it requires careful escape-routing and high-speed layout techniques. Differential Ethernet pairs should be routed as controlled-impedance transmission lines, with magnetics or appropriate PHY-side network interfaces implemented according to the system reference design. Typical uses include industrial controllers, embedded logging equipment, computing modules, factory automation nodes, serial-to-Ethernet systems, and compact network access products. In these applications, the integrated PHYs reduce the number of external Ethernet magnetics and interface components while managed features allow traffic prioritization and controlled access to shared uplink bandwidth. The primary design consideration is that the MBL ordering code and its 100-pin LFBGA land pattern must be matched exactly during PCB and assembly planning. Power, ground, RMII or MII signals, management buses, and all three Ethernet channels require careful partitioning. Compliance and exact operating limits should be confirmed against the manufacturer datasheet before production release. This page consolidates the verified distributor information, manufacturer documentation, package constraints, pricing indicator, and available cross-reference evidence. It also distinguishes the KSZ8893MBL from related ordering codes and clearly identifies engineering data that still requires confirmation from the full manufacturer datasheet.
KSZ8893MBLI - 3-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8893MBLI is a highly integrated, three-port Layer 2 managed Ethernet switch for 10/100 Mbps systems, with I2C and SPI control interfaces in a 100-pin LFBGA package. It supports RMII, MII, and SNI interfaces for connection to a host processor, while each switched port supports 10/100 Base-TX and Base-FX connectivity. An Ethernet switch is a semiconductor that connects multiple network endpoints through a dedicated frame-forwarding datapath. The managed-switch category extends basic Layer 2 forwarding with configuration, traffic-control, and status features. Within the hierarchy, KSZ8893MBLI is an Ethernet switch, then a managed Layer 2 switch, then a network interface IC and an integrated circuit for communications equipment. The KSZ8893MBLI integrates rate limiting, tagged and port-based VLAN support, QoS priority, port management, and Management Information Base counters. These functions allow a host processor to configure traffic handling and monitor switch activity through a serial management interface. The I2C and SPI interfaces provide alternatives for embedded system integration, while RMII, MII, and SNI connectivity support different processor and PHY arrangements. The KSZ8893 family is positioned for cost-sensitive, low-port-count 10/100 Mbps networks. A three-port configuration can support multiple wired endpoints without requiring a larger switch, while Layer 2 management features help implement controlled industrial, communications, and embedded Ethernet equipment. The SNI interface is particularly relevant to designs where an integrated network interface on the host supplies physical-layer connectivity. The KSZ8893MBLI is offered in a compact 100-pin LFBGA package, supporting space-constrained industrial and embedded designs. Layout requires careful high-speed trace routing, solid supply distribution, and effective decoupling. Use the manufacturer’s pin-description table and reference design guidance when assigning signals and placing bypass capacitors, especially for RMII, MII, and SNI implementations. This page combines the manufacturer’s device positioning with practical application guidance, interface-selection context, and verified lifecycle information. It also identifies where design engineers should consult the official datasheet for the complete pin list, electrical limits, register map, layout guidance, and device-specific recommendations before releasing a PCB.
KSZ8893MQL - 3-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip KSZ8893MQL is a highly integrated three-port 10/100 Mbps layer 2 managed Ethernet switch with integrated transceivers, MAC units, a non-blocking switch fabric, address lookup, and frame-buffer memory. It supports two 10/100 transceivers, with one PHY also supporting 100BASE-FX fiber connectivity, and is housed in a 128-pin PQFP package measuring 14 x 20 mm. The device is intended for low-port-count, cost-sensitive 10/100 Mbps switch systems. A managed Ethernet switch is a Layer 2 network device that forwards Ethernet frames between multiple ports while adding features such as VLAN tagging, port-based and tag-based prioritization, rate limiting, QoS, management access, and auto-negotiation. The KSZ8893MQL combines those switch-management functions with PHY transceivers, reducing the component count and board area required for embedded network equipment. The KSZ8893MQL supports 10BASE-T and 100BASE-TX copper links, while one integrated PHY supports 100BASE-FX. According to the Microchip product page and manufacturer datasheet, the device provides an extensive feature set for cost-sensitive switching systems, including rate limiting, tag/port-based VLAN support, QoS priority, and management capabilities. Its interface supports I2C and SPI control, as identified by distributor listings. The switch fabric is non-blocking and includes a dedicated address-lookup engine and on-chip frame-buffer memory. These resources support simultaneous frame handling across the integrated ports while reducing the processing burden on an external host processor. The device can therefore serve as the central Ethernet switching element in industrial control, embedded instrumentation, communications equipment, and compact network-edge systems. The KSZ8893MQL operates from a 3.3 V supply and supports non-volatile configuration storage and an enable or shutdown function, according to the verified distributor data. It also conforms to the IEEE 802.3u auto-negotiation protocol, allowing link partners to select the best common operating mode. The 128-PQFP package is surface mount and lead-free. Designers should preserve the required separation between copper Ethernet magnetics, fiber circuitry, power distribution, and the digital management interface. The manufacturer datasheet should be used for exact pin assignments, electrical limits, timing, register definitions, and layout guidance. The KSZ8893MQL is most appropriate when a design needs a small, managed three-port 10/100 Ethernet switch with integrated copper and optional fiber interfaces rather than a higher-port-count or higher-speed switch. This page combines the verified manufacturer, distributor, and cross-reference information with package-focused selection guidance, commercial data, and practical differentiation between documented same-family configurations.
KSZ8893MQLI - 3-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8893MQLI is an integrated three-port 10/100 Mbps Layer 2 managed Ethernet switch with integrated PHYs, CPU control and data interfaces, and support for 10/100 Base-FX/T/TX connectivity. The device is supplied in a 128-PQFP package measuring 14 x 20 mm and includes I2C and SPI host interfaces for configuration and control. An Ethernet switch is a semiconductor that connects multiple physical-network endpoints, forwards Ethernet frames according to learned MAC addresses, and separates traffic into collision domains. A managed Layer 2 switch adds configurable functions such as rate limiting, tag- and port-based VLANs, QoS priority, management, Management Information Base counters, and RMII, MII, or SNI CPU interfaces. The KSZ8893 is positioned for low-port-count, cost-sensitive embedded networking systems. The KSZ8893MQLI integrates three 10/100 Mbps Ethernet ports with PHYs and provides both management and data paths to an embedded processor. Supported management functions include rate limiting, VLAN operation, QoS priority, and MIB counters. I2C and SPI interfaces allow a host controller to configure the switch, while RMII, MII, and SNI options support processor-side connections. These capabilities make the device useful where several Fast Ethernet links must be consolidated without using a full-size external switch. The KSZ8893 family supports copper and fiber-oriented 10/100 networking and can serve as the central Layer 2 forwarding element in industrial controllers, embedded servers, communications equipment, and network appliances. Its managed features allow designers to partition traffic, prioritize latency-sensitive packets, and monitor port activity. The 128-PQFP package provides a high pin count suitable for parallel MII, RMII, SNI, management, media, and power connections. Typical deployments include factory automation controllers with Ethernet-connected sensors, compact industrial gateways, embedded network equipment, and OEM control systems. In these applications, the integrated PHYs reduce the number of discrete Ethernet components, while configurable VLAN and QoS features help separate equipment traffic from real-time control traffic. A processor can access switch registers and counters through I2C or SPI and connect through the supported CPU-side interface. Design the PCB around the manufacturer’s complete pin-description table and reference layout. Preserve the required Ethernet magnetics path, differential pair geometry, grounding, decoupling, and interface timing. Because this is a 128-pin PQFP, pin escaping and via planning are particularly important for the 14 x 20 mm footprint. Confirm the precise pin functions, strap requirements, clocking arrangement, and external-component recommendations in the Microchip datasheet before schematic release. This product page combines the manufacturer’s device description with package and sourcing information, practical integration guidance, and a parameter-level comparison framework. It helps engineers evaluate the KSZ8893MQLI against related Ethernet-interface options while keeping PCB compatibility, management features, and processor-interface requirements central to the selection decision.
KSZ8895FMQ - 5-Port 10/100 Managed Ethernet Switch | Microchip
Microchip Technology KSZ8895FMQ is a highly integrated, automotive-qualified, Layer 2 managed five-port Ethernet switch with 10/100BASE-T/TX physical interfaces and MII/RMII host connectivity, housed in a 128-pin PQFP package measuring 14 x 20 mm. It combines five 10/100-Mbps Ethernet ports, switching, physical-layer transceivers, traffic management, and power-management functions in one device. An Ethernet switch is a semiconductor that connects multiple physical-layer network ports and forwards Ethernet frames between them. The KSZ8895 belongs to the Layer 2 Ethernet-switch category, with managed traffic-control capabilities positioned above basic unmanaged Ethernet switching. Its integrated 10/100BASE-T/TX transceivers reduce the need for separate PHY components, while MII and RMII interfaces connect the switch to a host processor or embedded controller. Key features include five integrated 10/100-Mbps Ethernet ports, Layer 2 management, automotive qualification, low-power operation, advanced power management, flexible configuration, and quality-of-service support. The manufacturer datasheet also describes tagged-port processing, programmable rate limiting, priority-ratio support, four-queue prioritization, Rapid Spanning Tree Protocol support, packet filtering, and on-chip termination. These functions support cost-conscious network equipment while reducing external component count and board area. The KSZ8895 family integrates Micrel physical transceiver and switch technology into a single IC. Multiple packet filters, QoS queues, and spanning-tree features allow system designers to shape traffic behavior without implementing those policies in the host processor. The MII interface supports conventional parallel network-controller connectivity, while RMII reduces the number of host interface signals in designs where it is suitable. Typical uses include automotive Ethernet gateways, industrial Ethernet controllers, embedded network appliances, print servers, IP cameras, set-top equipment, and industrial control systems. The five-port arrangement supports connecting several 10/100-Mbps devices through one switched network segment, while the managed features are useful where deterministic prioritization or packet filtering is more important than a simple hub or basic switch. Designers should pay particular attention to PHY layout, 10/100BASE-TX magnetics and termination, RMII timing, MII signal integrity, decoupled supply rails, and the manufacturer’s recommended magnetic-component network. Microchip’s KSZ8895 documentation and migration application notes should be reviewed before changing between KSZ8895 ordering codes because functional replacement does not eliminate checks for package, temperature grade, firmware, register, and system-software requirements. This page consolidates verified distributor listings, manufacturer information, the KSZ8895 migration reference, package details, and practical selection guidance. It also distinguishes confirmed drop-in family replacements from unsupported assumptions, helping engineers identify the information that still requires datasheet and PCB-level verification before procurement.
KSZ8895FQXI - 5-Port 10/100 Managed Ethernet Switch | Microchip Technology
The Microchip Technology KSZ8895FQXI is an automotive-qualified, highly integrated Layer 2 managed five-port Ethernet switch with integrated 10BASE-T/100BASE-TX physical-layer transceivers and MII/RMII interfaces. It operates with a 3.3 V operating voltage and is housed in a 128-pin PQFP package measuring 14 mm by 20 mm. The switch supports five 10/100 Ethernet ports and is designed to reduce system cost by integrating network-interface functions that otherwise require discrete PHY and switching components. An Ethernet switch is a Layer 2 networking semiconductor that receives Ethernet frames on one port and forwards them to the appropriate destination port using MAC-address information. The KSZ8895 belongs to the broader hierarchy of Ethernet interface controllers, network switches, Layer 2 devices, and integrated network semiconductors. Its managed architecture allows a host processor or network controller to configure port behavior, while its MII and RMII interfaces support integration with embedded processors, field-programmable gate arrays, application processors, and industrial controllers. The KSZ8895FQXI provides five integrated 10/100 Ethernet ports, MII and RMII connectivity, and a single 3.3 V operating voltage. Its 128-PQFP 14 x 20 mm package exposes the switch, copper-physical-layer, control, management, clock, and power interfaces through 128 contacts. The automotive qualification indicated by Microchip makes the device relevant to vehicle-network designs as well as industrial, communications, and embedded applications requiring a compact managed Ethernet switch. A single-chip switching design can also reduce board area, external PHY count, and system-level assembly complexity. Microchip's integrated 10/100 Ethernet-switch implementation combines the 100BASE-TX drivers and 10BASE-T drivers so both can use the same magnetics. The 10BASE-T driver is incorporated into the 100BASE-T driver, with internally wave-shaped and pre-emphasized outputs having a typical 2.3 V amplitude. This integration supports shared copper-magnetics designs while preserving separate logical support for 10 Mb/s and 100 Mb/s operation. Management features are included at the Layer 2 level rather than requiring a separate switch controller for basic port management. Typical applications include automotive infotainment and in-vehicle networking, industrial Ethernet gateways, factory automation controllers, building-automation equipment, communications equipment, and embedded systems that need several 10/100 ports behind one processor interface. MII is useful when the connected host requires parallel data and control signals, while RMII reduces the number of interface signals in designs where pin density is constrained. The integrated copper PHYs also support designs intended to connect directly to Ethernet magnetics and RJ45 front ends. Hardware implementation requires careful attention to the manufacturer's KSZ8895FQX Hardware Design Checklist. The checklist specifies the RJ45 transmit-channel connections, including TX+ on RJ45 pin 3, TX- on RJ45 pin 6, and a 75-ohm series termination path through a 1000 pF, 2 kV capacitor to chassis ground. These network-interface details should be implemented exactly as described in the manufacturer document rather than inferred from generic Ethernet layouts. This product page combines the confirmed five-port 10/100 switch functionality, package information, manufacturer guidance, qualified replacement relationships, and practical hardware-design guidance. It is intended to help engineers identify the correct Microchip orderable variant, plan the MII or RMII host connection, and evaluate whether the same-package KSZ8895 family can satisfy a lifecycle or sourcing requirement without changing the PCB footprint.
KSZ8895MQ - 5-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8895MQ is an integrated five-port 10/100BASE-T/TX Layer 2 managed Ethernet switch with MII, RMII, or SNI connectivity and I2C/SPI configuration support. It operates from a 3.15 V to 3.45 V supply, supports data rates up to 100 Mbps, and is packaged in a 128-pin PQFP measuring 14 mm by 20 mm. An Ethernet switch is a network-semiconductor device that receives frames on one port and forwards them to selected destination ports. The five-port KSZ8895MQ integrates five 10/100 Ethernet ports, Layer 2 switching, port management, and advanced power-management functions. Within the broader networking hierarchy, it belongs to Ethernet controllers, interface ICs, network semiconductors, and integrated circuits. The KSZ8895MQ supports five integrated 10/100 ports and one MII interface according to the verified distributor description. MII supplies parallel Ethernet data and control signals, while RMII and SNI offer reduced-pin serialization options when supported by the connected host. I2C and SPI interfaces provide configuration and management access. Advanced power management, flexible configuration, and Layer 2 QoS features are identified by the manufacturer documentation. The device is designed for cost-sensitive, power-efficient 10/100 Mbps systems by combining Micrel physical-transceiver and switch technology on one IC. Its 3.3 V-class operating range and integrated five-port architecture reduce the component count required for embedded switching. The automotive-qualified KSZ8895 family also targets network equipment where managed Layer 2 functionality and power control are useful. Typical uses include industrial Ethernet control, automotive networking, embedded gateways, print systems, IP telephones, and other equipment that needs a compact five-port Fast Ethernet switch. Designers should verify the exact protocol mode, strap configuration, clock source, magnetics, termination, and layout requirements in the manufacturer datasheet before layout release. Layered QSFP-style magnetics, exact 50-ohm impedance geometry, and differential-pair routing according to the manufacturer reference design help preserve Ethernet signal quality. Sufficient supply decoupling and thermal copper are equally important because integrated transceivers and switching logic concentrate heat within the 128-pin surface-mount package. This page combines the verified product identity, electrical limits, interfaces, package data, replacement information, and application guidance with practical design notes. It also distinguishes confirmed drop-in replacements from merely similar Ethernet devices, helping engineers compare alternatives without assuming interchangeability.