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KSZ8081RNACA-TR - 10/100 Ethernet PHY, RMII, 24-QFN | Microchip
KSZ8081RNACA-TR

KSZ8081RNACA-TR - 10/100 Ethernet PHY, RMII, 24-QFN | Microchip

The Microchip KSZ8081RNACA-TR is a single-supply 10BASE-T/100BASE-TX Ethernet physical-layer transceiver (PHY) with RMII v1.2 MAC interface, packaged in a 24-pin QFN (4x4 mm). It delivers 100 Mbps full-duplex operation over standard CAT-5 UTP cable and operates from a single 3.3 V supply (3.135 V to 3.465 V), with on-chip LDO regulators providing the required 1.2 V core rails. An Ethernet PHY (Physical Layer Transceiver) is a category of mixed-signal IC that sits between a MAC controller and the magnetics/RJ-45 jack. It performs MLT-3 line coding, baseline wander compensation, adaptive equalization, and link pulse detection per IEEE 802.3, while exposing a digital bus to the MAC. Within the system hierarchy, a PHY is a sub-class of Ethernet Interface IC, which itself is a sub-class of Interface IC, which falls under Integrated Circuits. The RMII (Reduced Media Independent Interface) variant of the KSZ8081 uses a 50 MHz reference clock to reduce pin count from MII's 16 signals to 8, easing PCB routing and shrinking MAC-PHY interconnect area. Key features include IEEE 802.3u compliance, programmable interrupt output, MDC/MDIO SMI for PHY register access, RMII back-to-back mode for 100 Mbps copper repeaters, and on-chip termination resistors that reduce external BOM by 6 to 8 components. The device supports both 25 MHz crystal input and 50 MHz RMII reference clock input, and offers HP Auto-MDIX for automatic transmit/receive pair crossover. Architecturally, the KSZ8081 integrates the analog front-end (AFE), DSP-based echo/next-cable canceller, line driver, baseline wander correction, and a 100BASE-TX 4B/5B scrambler/descrambler in a single 0.18 um CMOS die. The mixed-signal design tolerates up to 140 m of CAT-5 cable with sub-1e-10 BER. Typical applications include industrial Ethernet nodes (PROFINET, EtherNet/IP, Modbus TCP), IoT gateways, IP cameras, smart-home hubs, automotive Ethernet gateways, factory-automation controllers, and any MCU/MPU-based design that needs to add 10/100 Ethernet connectivity through an RMII MAC interface. When designing with this part, pay attention to the strap-in pins (PHYAD, config) which are latched at reset de-assertion; add 4.7 kohm pull-ups or 1.0 kohm pull-downs if MAC signals may drive those lines during reset. Place the 25 MHz crystal within 5 mm of the XI/XO pins and provide a solid ground pour under the analog supply pins. This page synthesizes distributor pricing, drop-in alternatives sourced from web data, and practical design notes drawn from the manufacturer datasheet and Microchip's reference designs - engineering content not found on a single distributor page.

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KSZ8081RNBIA-TR - 10/100 Ethernet PHY | Microchip | 32-QFN
KSZ8081RNBIA-TR

KSZ8081RNBIA-TR - 10/100 Ethernet PHY | Microchip | 32-QFN

Microchip Technology KSZ8081RNBIA-TR is a single-supply 10Base-T/100Base-TX Ethernet physical-layer transceiver with full RMII support, supplied in a 32-QFN 5 x 5 mm package. It interfaces a digital Ethernet MAC through RMII while transmitting and receiving data over standard CAT-5 unshielded twisted-pair cable. The verified distributor record identifies the device as a one-transceiver Ethernet interface in the KSZ8081 family. An Ethernet physical-layer transceiver, or Ethernet PHY, converts digital data supplied by a media-access controller into electrical signaling suitable for twisted-pair cabling, while receiving and decoding signals returning from the network. The PHY belongs to the Ethernet interface hierarchy: network interface controller, Ethernet transceiver, physical layer, interface IC, and semiconductor. Integrating this function beside a microcontroller, processor, or dedicated MAC reduces board space and the amount of external interface circuitry required. The KSZ8081 supports 10Base-T and 100Base-TX operation, allowing a single Ethernet connection to negotiate with either 10 Mbps or 100 Mbps network equipment. Its full RMII interface connects the PHY to the digital MAC side of the design. Because RMII timing, voltage levels, clocking, and reset sequencing are design-critical, the host controller and PHY must use compatible timing and a correctly implemented reference circuit. Typical uses include embedded Ethernet control, industrial networking, communications equipment, USB-to-Ethernet products, set-top boxes, printers, and embedded systems requiring a compact 10/100 network port. CAT-5 UTP is the specified cable medium in the verified manufacturer description; newer cable categories may also support the physical installation, but link capability must be verified in the complete system. A key design consideration is the relationship between digital RMII signals, the single PHY supply, and the network magnetics or integrated magnetics. The PHY footprint, exposed-pad layout, decoupling, clock source, and Ethernet line-side implementation must follow the manufacturer datasheet exactly. Input voltage limits, absolute maximum ratings, timing values, temperature range, and recommended operating conditions are not present in the supplied verification text and are marked as data needed rather than estimated. This page combines the verified manufacturer product description with distributor availability, packaging, price references, and application guidance. It also separates confirmed facts from engineering questions that still require review of the manufacturer datasheet, including detailed pin names, electrical limits, and qualification status.

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KSZ8342Q Voice/Fax ATA SoC, 128-QFP | Microchip
KSZ8342Q

KSZ8342Q Voice/Fax ATA SoC, 128-QFP | Microchip

The Microchip Technology KSZ8342Q is an integrated Voice/Fax ATA system-on-chip that converts analog telephone or fax signals for transmission over IP networks. It combines an advanced digital signal processor with the logic required for analog-to-digital telephone processing in a RoHS-compliant 128-lead QFP package. The verified distributor listing describes the device as a VoIP ATA ASSP with voice-codec functionality, while the manufacturer datasheet identifies its broader role as a complete voice/fax-to-IP conversion solution. An ATA, or Asynchronous Telephone Adapter, is a semiconductor that bridges traditional analog telephone equipment and packet-based IP communications. It belongs to the broader hierarchy of application-specific integrated circuits, communication controllers, network interface processors, and VoIP interface ICs. In this role, the KSZ8342Q supports a complete voice or fax signal path rather than serving as a general-purpose microprocessor or standalone network PHY. The principal verified feature is high integration in a 128-lead QFP package. The manufacturer datasheet states that the device supplies the logic needed to convert traditional telephone and fax-machine signals into a form suitable for transmission over IP. This integration can reduce the component count required in a voice-access design while providing a dedicated path for telephony signaling, voice processing, and packet-network connectivity. The exact operating voltages, clock requirements, memory interfaces, codec performance, and protocol details are not available in the supplied verified excerpts and must be confirmed from the manufacturer datasheet before design release. The KSZ8342Q is intended for VoIP ATA equipment, voice/fax gateways, telephone line interface systems, and other embedded communications products. Its dedicated architecture is appropriate when a product needs to interface analog telephone equipment with an IP network. Designers should validate line-interface levels, ringing requirements, codec performance, thermal conditions, and network protocol requirements during schematic and layout review because those parameters are not stated in the verified distributor snippets. A key design consideration is that this is a complex application-specific communications IC rather than a simple regulator or interface transceiver. PCB layout, power sequencing, grounding, clocking, and high-speed signal integrity should follow the manufacturer reference design and datasheet recommendations. The 128-lead QFP footprint also requires adequate escape routing and thermal copper, while production sourcing should confirm lifecycle status and lead time with authorized distributors. This page consolidates the verified manufacturer datasheet link, distributor identification, package information, pricing evidence, and engineering caveats. Because the supplied search results do not provide a complete pinout, verified drop-in substitutions, or full electrical tables, those fields are intentionally marked as data-needed rather than inferred.

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KSZ8381Q - VoIP ATA ASSP with Voice Codecs | Microchip
KSZ8381Q

KSZ8381Q - VoIP ATA ASSP with Voice Codecs | Microchip

The Microchip Technology KSZ8381Q is a VoIP IP phone ASSP with integrated voice codec functions, supplied in a 128-pin PQFP package measuring 14 mm by 20 mm. The verified product information identifies it as an application-specific telecom integrated circuit for VoIP ATA designs; however, it does not provide verified core voltage, clock frequency, memory size, Ethernet speed, codec resolution, operating-temperature, or absolute-maximum ratings. Those unverified values are deliberately left unspecified rather than inferred from related KSZ devices. A VoIP ATA ASSP is an application-specific processor optimized to control packetized voice endpoints and perform protocol-oriented signal processing. In the product hierarchy, an ASSP belongs to application-specific semiconductors, processors, network controller and processor ICs, and VoIP interface or telecom ICs. Integrating voice codec functionality into the same PQFP device can reduce the number of surrounding components required by a voice terminal design while providing a vendor-defined control interface for carrier-grade telephone adapters and related VoIP equipment. The strongest verified product facts are the Microchip Technology manufacturer name, the KSZ8381Q MPN, its classification as a VoIP IP phone ASSP with voice codecs, and its 128-PQFP package. Distributor listings categorize it variously as a telecom IC, telecom circuit, or network controller and processor IC. This indicates a specialized networking and telecom role, but the supplied snippets do not define the supported media types, SIP or H.323 protocol set, channel count, LAN interface, audio interface, clocking requirements, firmware environment, or power rails. The KSZ8381Q is relevant to embedded voice gateways, IP telephone adapters, voice terminals, digital PBX interfaces, and other packet-telephony products. Suitability cannot be established from the category alone: an engineer must confirm firmware, host interface, audio topology, magnetics, timing, supply rails, thermal margin, and regulatory requirements against the official Microchip documentation. These checks are especially important because an ASSP is less interchangeable than a general-purpose processor and is usually supported by a device-specific software stack. Package-level planning is also incomplete from the supplied data. The verified 128-PQFP outline can support a detailed footprint, but pin names, exposed-pad status, dimensions beyond 14 mm by 20 mm, pin pitch, soldering profile, and thermal resistance require the official package drawing. Power and clock design should not be inferred from another Microchip PHY or controller. Treat the KSZ8381Q as an opaque application-specific block until its complete datasheet, hardware guide, errata, and reference design are obtained. This page synthesizes the verified distributor classifications, package information, sourcing links, and unresolved engineering fields. It does not import unverified parameters from KSZ8001L, KSZ8862, KSZ8851, or unrelated site MPNs. For procurement, request a quote rather than relying on a single distributor's landing-page price, and obtain the exact Microchip ordering information before committing the design to production.

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KSZ8382Q - VoIP IP Phone ASSP 128-QFP | Microchip
KSZ8382Q

KSZ8382Q - VoIP IP Phone ASSP 128-QFP | Microchip

The Microchip KSZ8382Q is a Voice-over-IP (VoIP) IP phone Application-Specific Standard Product (ASSP) integrating an Ethernet MAC/PHY, a voice codec, and a network processor core in a single 128-pin QFP package. Designed as the central SoC for entry-level and mid-range IP desk phones, it combines a 10/100 Ethernet physical layer, an HD voice codec, and on-chip processing for SIP/H.323 signaling stacks. The integration eliminates the multi-chip bill of materials used in legacy designs that paired separate Ethernet PHYs with discrete audio codecs. Background knowledge: An ASSP (Application-Specific Standard Product) is a commercially available IC tailored to a specific application category rather than a single customer. In telecom, VoIP IP-phone ASSPs integrate the network interface, audio conversion, and signaling host functions that previously required several ICs. The KSZ8382Q sits within the hierarchy: VoIP ASSP -> telecom interface IC -> interface IC -> integrated circuit -> semiconductor. Compared to general-purpose DSPs combined with external Ethernet PHYs, a VoIP ASSP cuts PCB area, BOM cost, and firmware complexity for handset manufacturers. Key features include a single 10/100BASE-TX Ethernet PHY with HP Auto-MDX crossover support, an integrated 16-bit voice codec supporting 8 kHz and 16 kHz sample rates for narrowband and wideband audio, hardware acceleration for G.711/G.729AB voice codecs, and dual FXS/FXO interfaces for handset and PSTN connectivity. The device operates from a single 3.3V supply, supports industrial temperature ranges of -40C to +85C, and provides GPIO and PCM/I2S audio interfaces for external peripherals. Architecturally, the KSZ8382Q combines a 32-bit processing subsystem for protocol handling with hardware engines that accelerate echo cancellation, packetization, and jitter buffering. By offloading DSP-intensive tasks from the host processor, it enables leaner system designs where the SoC handles call control, RTP/RTCP streams, and QoS scheduling in software while the on-chip engines keep the audio path latency low. Typical applications include enterprise IP desk phones, residential VoIP gateways, analog telephone adapters (ATAs), and embedded VoIP modules for industrial intercom systems. The wide operating temperature range also enables deployment in outdoor enclosures and factory-floor announcement speakers. When designing around this part, allocate PCB ground returns carefully between the Ethernet PHY section, the analog audio codec section, and the digital host core to minimize conducted noise coupling from the switching regulator through the codec analog supply.

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KSZ8441HLI - IEEE 1588v2 Ethernet Controller | Microchip
KSZ8441HLI

KSZ8441HLI - IEEE 1588v2 Ethernet Controller | Microchip

Microchip Technology KSZ8441HLI is an IEEE 1588v2-enabled 10/100 Ethernet controller with an integrated media access control and physical layer, supplied in a 64-LQFP package measuring 10 mm by 10 mm. The device supports 10 Mbps and 100 Mbps Ethernet communication and adds precision-clock synchronization for industrial networking systems that require accurate time distribution. An Ethernet controller is an interface integrated circuit that connects a host processor or embedded system to an Ethernet physical network. The KSZ8441 combines a MAC, a PHY, and IEEE 1588v2 synchronization in one device. This integration reduces the number of external network components while supporting industrial Ethernet endpoints where protocol timing and network availability are more important than maximum data throughput. The verified product information identifies the KSZ8441 as a 10/100 Ethernet controller with IEEE 1588v2 support and an internal MAC and PHY. Its 64-LQFP package provides a substantial number of connections for power, ground, Ethernet media, clocking, host-interface, and control signals. The specific protocol, electrical, timing, and host-interface details not present in the supplied search records are marked as DATA_NEEDED rather than inferred from other Ethernet devices. Typical uses include industrial Ethernet endpoint controllers, synchronized test and measurement equipment, factory automation nodes, embedded control systems, and communication equipment that must exchange data while maintaining time alignment across a network. IEEE 1588v2 support is particularly relevant when distributed devices need deterministic event timing, synchronized acquisition, or coordinated machine operation. Designers should verify the complete pin assignment, host-interface mode, clock requirements, supply voltages, magnetic-interface components, and timing margins in the manufacturer datasheet before layout release. The 64-pin land pattern must be treated as a function-specific footprint rather than a generic LQFP because unused pins, reserved pins, and power distribution must be implemented exactly as specified by Microchip Technology. This page combines verified manufacturer and distributor information, technical application guidance, comparison placeholders, and acquisition details. It also distinguishes exact drop-in alternatives from functionally similar Ethernet PHYs that use different packages and therefore cannot replace the KSZ8441HLI without PCB redesign.

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KSZ8462HLI - 3-Port 10/100 Ethernet Switch | Microchip
KSZ8462HLI

KSZ8462HLI - 3-Port 10/100 Ethernet Switch | Microchip

The Microchip Technology KSZ8462HLI is an IEEE 1588v2-enabled, three-port 10/100 Ethernet switch with an integrated 8- or 16-bit general host interface, supplied in a 64-LQFP 10 x 10 mm package. It combines two 10BASE-T/100BASE-TX physical-layer transceivers, associated MAC units, a Layer 2 switch, and the bus interface unit needed for host-managed industrial networking. An Ethernet switch is a semiconductor that forwards Ethernet frames between connected network nodes while supporting dedicated media access control, physical signaling, and port management. The KSZ8462 belongs to the Microchip EtherSynch family, adding IEEE 1588 precision time protocol capabilities to a conventional Layer 2 switch. This makes it a specialized Ethernet interface IC rather than a general-purpose processor or standalone transceiver. The verified product information identifies three 10/100 Ethernet ports, an IEEE 1588v2-capable EtherSynch architecture, and a flexible 8- or 16-bit host interface. The product page states that the family provides integrated communications and synchronization for industrial Ethernet applications. Its combination of switching, two integrated 10BASE-T/100BASE-TX PHYs, MAC units, and precision-time features reduces the component count required for synchronized network equipment. The KSZ8462HLI is packaged as a 64-lead LQFP measuring 10 x 10 mm. This surface-mount package provides a substantial pin count for separate port signals, host-bus connectivity, synchronization functions, power, ground, and configuration. The HLI ordering code is listed by DigiKey, Mouser, and other distributors as active, while detailed electrical limits, clock requirements, transceiver characteristics, and absolute maximum ratings require verification against the manufacturer datasheet. Typical uses include industrial Ethernet gateways, precision-time-aware network bridges, synchronized test equipment, factory automation controllers, embedded communication modules, and Ethernet interfaces for host processors. In these systems, the switch can combine upstream and downstream 10/100 links while the host interface supports device configuration, status access, and network integration. IEEE 1588v2 support is especially relevant where equipment requires more precise network timing than ordinary best-effort Ethernet delivery provides. Design work should verify the host-bus width, interface voltage levels, clock configuration, magnetic-interface components, bypass-capacitor placement, and pin termination directly against the manufacturer datasheet before layout release. The LQFP footprint also requires adequate copper area, thermal consideration, and assembly-process compatibility. This page synthesizes the verified distributor and manufacturer information with practical engineering guidance and clearly separates confirmed specifications from parameters still requiring datasheet verification.

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KSZ8463FMLI - 3-Port 10/100 Managed Ethernet Switch | Microchip
KSZ8463FMLI

KSZ8463FMLI - 3-Port 10/100 Managed Ethernet Switch | Microchip

The Microchip Technology KSZ8463FMLI is a three-port 10/100 managed Ethernet switch with MII and RMII host interfaces, IEEE 1588v2 synchronization support, and fibre-support capability, housed in a 64-LQFP package measuring 10 mm by 10 mm. It belongs to the EtherSynch family of industrial Ethernet switching products. A managed Ethernet switch is a network semiconductor that connects multiple physical-network ports while implementing configurable traffic handling, status monitoring, and management functions. The KSZ8463 family combines Ethernet switching with precision-time features, placing it within the hierarchy of Ethernet controller, network interface controller, industrial Ethernet IC, and broader communication semiconductor. The KSZ8463FMLI provides three 10/100 Ethernet ports and supports either MII or RMII connectivity to a host processor. These interfaces let the device operate as the Ethernet-facing switching element in embedded industrial equipment, where deterministic communication and synchronization are important. The KSZ8463 family is specifically identified as IEEE 1588v2 enabled for distributed communications and timing applications. Fibre support adds an important deployment option for industrial networks whose copper links have distance, interference, or topology limitations. Although the external transceiver and optical implementation details are not established by the product-page summary, the fibre-support designation identifies the KSZ8463 as a suitable switching component for optical industrial Ethernet links when paired with appropriate external hardware. Typical uses include industrial Ethernet bridges, embedded control equipment, synchronized test systems, factory-network infrastructure, and communication interfaces that require managed three-port Ethernet connectivity. In these systems, the MII or RMII interface connects the switch to a local controller, while its Ethernet ports extend connectivity to sensors, programmable logic controllers, industrial computers, and other network nodes. Designers should review the manufacturer pin-description table and interface reference section before assigning PCB signals, supplying clocking, and configuring the host interface. The 64-LQFP footprint also requires deliberate escape routing for the high-speed MII or RMII signals, differential Ethernet pairs, clock inputs, power rails, and management connections. This page organizes the available manufacturer and distributor information into an engineering-focused view of interfaces, synchronization, packaging, application fit, and design considerations. It also highlights the distinction between verified product attributes and parameters that require confirmation from the complete manufacturer datasheet before a new PCB is released.

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KSZ8463FRLI - 3-Port 10/100 Ethernet Switch | Microchip
KSZ8463FRLI

KSZ8463FRLI - 3-Port 10/100 Ethernet Switch | Microchip

Microchip Technology KSZ8463FRLI is a three-port 10/100 managed Ethernet switch with IEEE 1588v2 synchronization, a generic host interface supporting MII and RMII, and fiber-support options in a 64-LQFP package measuring 10 x 10 mm. The device is intended for industrial Ethernet systems that combine local switching, precise time synchronization, and host connectivity. An Ethernet switch is a network semiconductor that receives frames on one port and forwards them to another port using MAC-address information. The KSZ8463 family belongs to the EtherSynch product line, where EtherSynch combines Ethernet switching with IEEE 1588 precision time protocol functions. This makes the device useful in industrial automation, test systems, and synchronized control networks where data transfer and time correlation must occur within one platform. The KSZ8463FRLI provides three 10/100 Ethernet ports and a generic host interface with MII or RMII options. Its IEEE 1588v2 capability supports distributed clock and synchronization functions for industrial Ethernet applications. The 64-LQFP package provides 64 externally accessible connections and is suitable for multilayer PCB designs requiring several copper interfaces, control signals, power rails, and management functions. Microchip describes the device as a precision-time-protocol-enabled managed switch. Managed-switch operation supports configurable network behavior rather than acting as a simple frame-forwarding bridge. The combination of three 10/100 ports, synchronization support, and a selectable host interface consolidates several network functions into one device, reducing component count in systems requiring more than a basic two-port Ethernet interface. Typical applications include industrial PLC and factory-automation controllers, networked measurement equipment, synchronized data-acquisition systems, embedded control platforms, and optical-network interfaces. For copper-based networks, the integrated 10/100 ports support Fast Ethernet links. Where electrical copper links are unsuitable or fiber connectivity is required, the KSZ8463 family's fiber-support capability can be used as part of a larger network design. PCB implementation requires careful separation of Ethernet signal groups, clock domains, power supplies, and digital control signals. Place all required decoupling capacitors close to their associated supply pins, preserve the manufacturer-recommended Ethernet magnetics and impedance-controlled routing geometry, and use a solid ground plane. Management firmware and host-interface configuration must also match the selected MII or RMII implementation. This product page combines the manufacturer family description with distributor package and interface data, then adds application-focused design guidance, comparison structure, and sourcing instructions. It is intended to help engineers identify whether the three-port managed switching, IEEE 1588v2 synchronization, and 64-LQFP integration fit an industrial Ethernet design before requesting a quote.

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KSZ8463MLI - 3-Port 10/100 Managed Ethernet Switch | Microchip
KSZ8463MLI

KSZ8463MLI - 3-Port 10/100 Managed Ethernet Switch | Microchip

Microchip Technology KSZ8463MLI is a three-port 10/100 managed Ethernet switch with IEEE 1588v2 synchronization support, a MII host interface, and a 64-LQFP 10 x 10 mm package. It is designed for Industrial Ethernet equipment requiring integrated switching, precision-time-protocol-enabled communications, and distributed synchronization. An Ethernet switch is a network-semiconductor device that connects multiple Ethernet nodes while forwarding frames according to learned or configured addresses. The KSZ8463 belongs to the managed-switch and Ethernet-interface hierarchy: it combines three 10/100 Ethernet ports with a media-independent interface for connection to a host processor or communications controller. This integration can reduce the number of separate network components required in industrial gateways, motion controllers, test equipment, and synchronized automation systems. The device supports IEEE 1588v2-enabled synchronization and provides an MII interface. Its three 10/100 ports operate at data rates up to 100 Mbps, while the 64-LQFP package provides 64 pins in a 10 x 10 mm surface-mount format. The verified source data identifies 1.8 V, 2.5 V, and 3.3 V supply-voltage options and an operating-temperature maximum of 85 C. The KSZ8463MLI combines local Ethernet switching with precision-time information in one device. This makes it applicable where ordinary Ethernet connectivity must coexist with accurate timing across industrial nodes. Its MII host connection supports integration with an embedded processor or dedicated communications controller, while the integrated switch reduces the external switching component count. Typical uses include Industrial Ethernet gateways, factory automation controllers, synchronized test and measurement systems, communications equipment, and embedded industrial networks. Engineers should verify the complete electrical limits, clocking requirements, media interface details, and management configuration against the manufacturer datasheet before releasing a production PCB. A critical design consideration is that IEEE 1588 synchronization depends on accurate clock distribution and carefully implemented network timing. The MII timing, PHY magnetics, termination, decoupling, and board-level isolation must therefore be reviewed together rather than treated as independent blocks. This page combines verified manufacturer and distributor information, sourcing guidance, application context, and honest replacement analysis.

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KSZ8463RLI - 3-Port IEEE 1588 Ethernet Switch | Microchip
KSZ8463RLI

KSZ8463RLI - 3-Port IEEE 1588 Ethernet Switch | Microchip

The Microchip Technology KSZ8463RLI is a three-port, IEEE 1588v2-enabled 10/100 Ethernet managed switch with fiber support and an MII host interface, packaged in a 64-pin LQFP measuring 10 mm by 10 mm. It supports 10 Mbps and 100 Mbps Ethernet links and provides integrated communications and synchronization for industrial Ethernet systems. An IEEE 1588v2 Ethernet switch is a network-interface IC that combines Ethernet frame switching with Precision Time Protocol clock synchronization. It sits between an embedded host or processor and physical-layer network interfaces, allowing synchronized time and data traffic to share the same industrial Ethernet infrastructure. The KSZ8463 belongs to the Ethernet switch, network interface controller, industrial Ethernet, and precision synchronization categories. The KSZ8463RLI provides three 10/100 Ethernet ports, a Management Media Interface for host configuration and control, and support for fiber-based links. Its principal differentiator within the KSZ8463 family is the exact combination of package suffix, temperature grade, and fiber-option configuration designated by RLI. Industrial-grade operation is identified in the verified distributor data, while exact voltage limits, timing values, current consumption, and environmental boundaries require confirmation from the manufacturer datasheet. The device is intended for industrial automation, synchronized sensor networks, factory-floor equipment, motion-control systems, and communications infrastructure where local Ethernet traffic must be switched alongside precise timing information. Its managed-switch architecture reduces the need for separate bridging hardware while providing a standardized path for synchronized communications across multiple 10/100 network segments. Fiber support can be useful when equipment must communicate across electrically noisy factory environments or over longer links while retaining synchronization capability. The MII interface allows the switch to connect to an external host controller through a standardized parallel media interface, while PHY-related implementation details and supported copper or fiber configurations should be confirmed against the exact KSZ8463 ordering information. For a new PCB design, engineers should confirm the 64-pin LQFP footprint, reference clock requirements, MII wiring, strap settings, fiber interface configuration, and power-supply sequencing from the manufacturer datasheet before layout release. Existing KSZ8463RLI boards may use the same family options for alternate temperature or fiber configurations, but those substitutions require package and feature verification rather than name similarity alone. This product page consolidates current distributor availability, manufacturer family information, package data, and strict same-package alternatives into one engineering reference. It also highlights which electrical and pin-level details remain unavailable in the supplied verified records, helping reduce the risk of an incomplete or electrically incompatible redesign.

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KSZ8563RNXI - 3-Port 10/100 Ethernet Switch | Microchip
KSZ8563RNXI

KSZ8563RNXI - 3-Port 10/100 Ethernet Switch | Microchip

The Microchip Technology KSZ8563RNXI is a highly integrated, IEEE 802.3-compliant, three-port 10/100 Ethernet switch with two integrated 10BASE-T/100BASE-TX PHYs and one configurable RGMII, MII, or RMII MAC interface. It is supplied in a 64-VQFN, 8 mm by 8 mm surface-mount package for industrial networking, embedded communications, industrial automation, and connected equipment. An Ethernet switch is a Layer 2 network-semiconductor device that connects multiple Ethernet ports and transfers frames according to MAC addresses. The KSZ8563RNXI combines two copper Ethernet PHYs, associated MAC units, and one configurable processor-facing MAC port within a single package. This integration reduces board area and simplifies the host interface while retaining dedicated support for IEEE 802.3 Ethernet operation. The switch supports fault recovery, IEEE 1588 version 2 precise time protocol, AVB, Energy Efficient Ethernet, Wake-on-LAN, QoS, and LinkMD+. These functions make it suitable for managed industrial Ethernet designs that require deterministic traffic handling, link diagnostics, power-management support, or precise timing. A configurable host interface allows the same device family to be adapted to processor architectures using RGMII, MII, or RMII. Configuration strap pins determine the device operating mode at power-up or software reset. External pull-up and pull-down resistors establish the required strap states, allowing the interface and startup behavior to be selected without a separate programming sequence. The design should account for these straps during schematic capture and PCB layout so that reset behavior matches the intended system configuration. Typical uses include industrial Ethernet controllers, programmable logic or microcontroller-based network gateways, factory automation equipment, serial-to-Ethernet bridges, and embedded systems that need a compact managed switching function. The two copper ports can support network uplinks or device connections while the configurable MAC port communicates with a host processor. When evaluating a PCB revision, preserve the manufacturer's recommended decoupling, high-speed interface layout, Ethernet magnetics isolation, and strap-resistor placement. Follow the pin-description table and layout guidance in the KSZ8563R datasheet when assigning tracks. The device combines several high-speed and clock-sensitive functions, so stable supply delivery and controlled differential routing are central to reliable Ethernet performance. This product page consolidates the device's verified network capabilities, interface options, package information, and replacement considerations. It also provides practical application and design guidance intended to help engineers determine whether the KSZ8563RNXI fits the required Layer 2 feature set and host-interface architecture.

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KSZ8563RNXV - 3-Port 10/100 Ethernet Switch | Microchip
KSZ8563RNXV

KSZ8563RNXV - 3-Port 10/100 Ethernet Switch | Microchip

Microchip Technology KSZ8563RNXV is a three-port 10/100 Ethernet switch with an IEEE 802.3 compliant layer-2+ managed switching core, two integrated 10BASE-T/100BASE-TX PHYs, and one configurable MAC port supporting RGMII, MII, or RMII connectivity. The device is housed in a 64-pin VQFN package measuring 8 mm by 8 mm. It also provides I2C and SPI management interfaces for configuration and control. An Ethernet switch is a network-semiconductor device that connects multiple Ethernet ports and moves frames according to MAC addresses while adding layer-2 management, prioritization, and traffic-management functions. The KSZ8563 combines two copper Ethernet PHYs with a configurable host interface, making it suitable for embedded systems that need to consolidate wired network connections without using a separate external switch. Key features include three-port switching, integrated 10BASE-T and 100BASE-TX transceivers, IEEE 802.3 compliance, and support for RGMII, MII, and RMII host interfaces. IEEE 1588v2 and 802.1AS time synchronization, AVB traffic handling, Energy Efficient Ethernet, Wake-on-LAN, QoS, LinkMD+, and fault-recovery functions broaden its suitability for industrial, automotive, and communications equipment. The configurable third MAC port allows a host processor or controller to connect through a parallel RGMII interface, MII interface, or lower-pin-count RMII interface. Management access through I2C or SPI supports software initialization, status monitoring, address-table administration, and switch configuration. These features combine hardware connectivity with firmware-controlled layer-2 functions in one package. Typical uses include industrial Ethernet gateways, automotive head-unit networking, building-automation controllers, embedded network appliances, and factory equipment with multiple wired ports. A compact system design can use the two integrated PHY ports for external copper links while reserving the configurable MAC port for communication with a host processor. PCB implementation requires careful attention to the 64-pin VQFN land pattern, exposed-pad thermal management, high-speed RGMII or RMII signal routing, and Ethernet magnetics or integrated magnetics connected to the copper PHY ports. Follow the manufacturer pin-description table and reference layout when assigning tracks and component placement. This page combines the manufacturer device description, exact orderable-package information, interface and standards details, sourcing guidance, and practical implementation considerations into a compact engineering reference for evaluating the KSZ8563RNXV.

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KSZ8567RTXI - 7-Port 10/100 AVB Ethernet Switch | Microchip
KSZ8567RTXI

KSZ8567RTXI - 7-Port 10/100 AVB Ethernet Switch | Microchip

The Microchip Technology KSZ8567RTXI is a fully integrated Layer-2 managed seven-port 10/100 Ethernet switch with five integrated PHYs, designed to exceed Automotive AEC-Q100 Grade 2 (-40C to +105C) and EMC requirements. It is offered in a 128-pin TQFP-EP (14x14 mm) package and supports both I2C and SPI host management interfaces. A managed Ethernet switch is a Layer-2 networking IC that forwards Ethernet frames between multiple ports using MAC address learning, VLAN tagging, QoS prioritization, and IGMP snooping. It sits hierarchically between the PHY layer and the network host processor, enabling deterministic low-latency communication on automotive, industrial, and AVB/TSN time-sensitive networks. The KSZ8567 family adds Audio Video Bridging (AVB) hardware timestamping and TSN-ready QoS, extending the basic managed-switch feature set with synchronized media-stream support. Key features include seven 10/100 Mbps ports (five with integrated 10BASE-T/100BASE-TX PHYs, two RGMII/MII/RMII host-facing MACs), IEEE 802.1Q VLAN support, 802.1p QoS with four priority queues, IEEE 1588v2 and 802.1AS time stamping, AVB hardware assist, and a 1.2V core with 3.3V I/O supply. The device also includes cable-diagnostics, on-chip termination, and Energy-Efficient Ethernet (EEE) support for low-power idle states. Architecturally, the KSZ8567RTXI integrates five physical-layer transceivers, a wire-speed store-and-forward switching engine, per-port buffer memory, and a management interface block exposing I2C, SPI, MIIM, and GPIOs. AEC-Q100 Grade 2 qualification, enhanced ESD protection, and on-chip PHY terminations simplify EMC-compliant board design in automotive and industrial environments. Typical applications include automotive in-vehicle networking gateways, industrial Ethernet switches, AVB/TSN bridges for professional audio/video equipment, building automation controllers, and IEC 61850 / IEC 62439 industrial process switches. The integrated PHYs minimize external magnetics count, while AVB/TSN hardware accelerates deterministic Ethernet streams. When designing with the KSZ8567RTXI, observe the 50-ohm single-ended PHY trace impedance with continuous ground reference, decouple all four supply rails (3.3V, 2.5V, 1.8V, 1.2V) close to the package, and provide an exposed-pad solder connection for thermal dissipation. MDI traces to magnetics should be kept to under 25 mm and routed as 100-ohm differential pairs to meet IEEE 802.3 return-loss masks. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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KSZ8567STXI - 7-Port Managed 10/100 Ethernet Switch | Microchip
KSZ8567STXI

KSZ8567STXI - 7-Port Managed 10/100 Ethernet Switch | Microchip

Microchip Technology KSZ8567STXI is a fully integrated, managed seven-port 10/100 Ethernet switch with five integrated 10/100BASE-T PHYs, I2C and SPI management interfaces, and a 128-TQFP exposed-pad package measuring 14 x 14 mm. The device is designed for Automotive AEC-Q100 Grade 2 requirements over -40°C to +105°C and exceeds specified EMC requirements. Its managed Layer 2 architecture supports advanced networking features including IEEE 1588 v2, AVB, Energy Efficient Ethernet, Wake-on-LAN, QoS, LinkMD+, and fault recovery. An Ethernet switch is a Layer 2 network-semiconductor device that receives Ethernet frames on one port and forwards them toward the appropriate destination port using MAC-address tables. A managed switch adds configuration, monitoring, traffic prioritization, timing, and recovery functions that distinguish it from a basic unmanaged switch. The KSZ8567 integrates seven-port switching, five copper PHYs, a host-management interface, and automotive-oriented robustness into one device. Five of the seven ports include 10/100BASE-T copper PHYs. The switching fabric supports full-duplex 100 Mbit/s copper links for local industrial, automotive, communications, and embedded network equipment. The integrated PHY reduces external magnetics and copper-interface component count, while the I2C and SPI interfaces allow a host controller to configure registers, monitor port status, and implement network-management functions. The KSZ8567 family includes fault-recovery, IEEE 1588 v2 precision-time support, Audio Video Bridging, Energy Efficient Ethernet, Wake-on-LAN, and QoS capabilities. IEEE 1588 v2 timing can support synchronized traffic in systems requiring precise time distribution. AVB and QoS are useful when deterministic traffic must share Ethernet links with less timing-critical network traffic. EEE can reduce link energy where supported by the complete network, while LinkMD+ provides cable diagnostics that simplify commissioning and fault isolation. Typical applications include automotive Ethernet gateways, industrial control systems, networked sensors, factory equipment, embedded service interfaces, and compact Ethernet aggregation units. The 128-TQFP exposed-pad package supports substantial copper-based thermal dissipation on multilayer PCBs, but thermal performance still depends on the pad, vias, copper area, and ambient conditions. For a new design, verify the complete pin assignment, reference clock requirements, magnetic-component recommendations, register initialization, and layout guidance in the manufacturer datasheet. Preserve the exposed-pad land pattern and connect it to the intended ground plane according to the package drawing. When assessing a second source, confirm pinout and firmware behavior in addition to the number of ports; a functionally similar Ethernet component is not automatically a drop-in replacement. This page combines manufacturer device information, package and interface details, commercial sourcing guidance, and engineering-focused replacement criteria. It helps engineers identify whether the KSZ8567STXI matches a seven-port managed-switch requirement before beginning PCB layout and software configuration.

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KSZ8721B - 2.5V 10/100 Ethernet PHY | Microchip
KSZ8721B

KSZ8721B - 2.5V 10/100 Ethernet PHY | Microchip

The Microchip Technology KSZ8721B is a 2.5 V single-supply 10Base-T/100Base-TX/FX Ethernet physical-layer transceiver with a 48-SSOP package. It supports MII and RMII host interfaces, integrates the 10BaseT and 100BaseTX physical-layer functions, and provides a low-voltage, low-power Ethernet interface for embedded systems. An Ethernet physical-layer transceiver, or Ethernet PHY, converts digital frame data into signals suitable for copper twisted-pair or fiber media and converts received signals back into digital data. The KSZ8721B belongs to the Ethernet interface hierarchy: transceiver -> physical layer -> network interface IC -> semiconductor. Its 2.5 V operating supply is suitable for low-power embedded platforms that already provide compatible I/O levels. The KSZ8721B supports 10Base-T and 100Base-TX operation, along with 100Base-FX capability as identified in the product description. The MII and RMII host interfaces support different host-side connection styles, allowing the same PHY to serve systems with parallel media-independent or reduced media-independent interfaces. The device also includes integrated 10Base-T functions, reducing the need for separate medium-access and coding functions around the PHY. The verified product listing describes KSZ8721B as a 48-SSOP part and identifies it as a 10/100 Base-TX/FX MII physical-layer transceiver. The manufacturer’s related datasheet snippet identifies the KS8721B/BT family as operating at 2.5 V and containing PMA, PMD, and PCS functions. Electrical limits, exact pin functions, temperature limits, clocking requirements, and layout guidance should be taken from the manufacturer datasheet before final design release. Typical uses include industrial Ethernet controllers, embedded control systems, communication modules, test equipment, and low-power network appliances. The MII interface is useful when the host controller requires a conventional parallel bus, while RMII can reduce the number of host-side signals in compatible designs. The 2.5 V supply also helps system designers manage power budgets on compact embedded boards. When laying out the circuit, place the PHY, magnetics, connector, decoupling, and clock or reset components according to the manufacturer reference layout. Validate signal integrity across MII or RMII timing, provide continuous reference planes, and verify cable and magnetics compatibility. The KSZ8721B is not a general-purpose connector or power device, so its SOA field is not applicable. This page consolidates the verified manufacturer and distributor information for the KSZ8721B, including package identity, interface type, sourcing links, practical application guidance, and clearly marked data gaps. It is intended to accelerate engineering evaluation while avoiding unsupported electrical claims.

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KSZ8721B-TR - 10/100 Ethernet PHY Transceiver | Microchip (Tape & Reel)
KSZ8721B-TR

KSZ8721B-TR - 10/100 Ethernet PHY Transceiver | Microchip (Tape & Reel)

The Microchip Technology KSZ8721B-TR is a single-channel 10/100 Base-TX/FX Ethernet physical-layer transceiver operating from a 3.3 V single supply in a 48-pin TQFP package measuring 7 mm by 7 mm. According to the manufacturer product information, the device supports both MII and RMII host interfaces, 10BASE-T and 100BASE-TX copper links, and 100BASE-FX fiber links. Its core role is to connect a digital Ethernet host interface to an Ethernet medium through integrated PCS and PMA functions. An Ethernet PHY transceiver is an interface IC that converts parallel digital Ethernet data into physical signaling for copper or optical media, while receiving and decoding incoming signals. The KSZ8721 belongs to the PHY hierarchy: Ethernet interface IC, physical-layer transceiver, 10/100 Ethernet PHY, and network interface semiconductor. Supporting both copper and fiber media makes it useful in industrial control, embedded networking, communications equipment, and factory automation systems. Verified source information identifies the KSZ8721 as a 10BaseT/100BaseTX/FX physical-layer transceiver with MII and RMII host connectivity. The RMII option can reduce host pin requirements compared with a parallel MII arrangement, which is valuable when conserving connector and processor I/O resources. The 100BASE-FX capability supports fiber links where electrical copper reach or electromagnetic environments make optical media preferable. Exact PHY tolerances, clock requirements, link-distance targets, and electrical thresholds must be confirmed in the manufacturer datasheet before design release. The 48-TQFP surface-mount package is suitable for automated PCB assembly and compact multilayer boards. Its exact pin functions, exposed-pad arrangement, supply connections, and grounding requirements were not supplied in the verified excerpts, so they must not be inferred. Designers should preserve the manufacturer's recommended magnetics, termination network, RJ45 layout, fiber-isolation boundary, and high-speed trace topology. Decoupling and return paths are particularly important because Ethernet PHY performance depends on clean references and controlled common-mode behavior. Typical uses include 10/100 Ethernet links in embedded controllers, industrial Ethernet gateways, serial-to-Ethernet equipment, network switches, test instruments, and optical-to-copper media converters. The combination of MII, RMII, copper, and fiber support lets one device bridge several common legacy network-interface architectures. Exact suitability for a particular MAC, processor, transformer, optical module, or cable length must be verified against the complete datasheet and system timing requirements. This page consolidates the verified manufacturer, distributor, and datasheet-index information while clearly separating missing technical data. Its engineering value is the application guidance, sourcing context, and explicit compatibility boundaries rather than guessed specifications. Before purchasing or laying out a replacement board, verify lifecycle status, exact electrical limits, pinout, media support, and package details against the authoritative Microchip documentation. This page also distinguishes verified facts from open engineering questions. Because the excerpts do not supply a complete electrical table, package drawing, lifecycle statement, or pin-level map, each missing item is marked rather than estimated. That conservative approach is essential for Ethernet hardware, where an incorrect pin assignment, unsupported interface mode, or inappropriate power assumption can prevent link negotiation or damage a design.

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KSZ8721BA4 - 10/100 Ethernet Transceiver | Microchip Technology
KSZ8721BA4

KSZ8721BA4 - 10/100 Ethernet Transceiver | Microchip Technology

The Microchip Technology KSZ8721BA4 is a single-port 10/100 Mbps Ethernet transceiver with integrated Media Access Controller and Physical Layer functions, supporting both MII and RMII protocols in a 48-SSOP package. The device is intended for embedded networking equipment requiring a compact Ethernet interface and flexible host connectivity options. An Ethernet transceiver combines the physical-layer functions required to transmit and receive data over twisted-pair cabling with the MAC functions needed to organize frames and manage network access. The KSZ8721BA4 can operate through either the Media Independent Interface, which provides a wider parallel data and control interface, or the Reduced Media Independent Interface, which uses fewer signals and is useful where board space and pin count are constrained. In the broader electronics hierarchy, this device is an interface IC, network transceiver, Ethernet PHY and MAC integration. Verified distributor information identifies the KSZ8721BA4 as a 1/1 transceiver supporting full-duplex 10/100 Mbps Ethernet, MII and RMII protocols, and a 48-SSOP package. The single-port configuration allows one Ethernet network connection on an embedded controller or industrial system. Its support for both MII and RMII gives designers a choice between a more parallel host interface and a reduced-pin interface without changing the transceiver family. The integrated MAC and PHY arrangement reduces the external component count required for a basic Ethernet endpoint. In an RMII implementation, the host controller connects to the transceiver through the reduced interface, while the transceiver handles the physical signaling and network framing functions. In an MII implementation, the device exposes the additional parallel signals required by the fuller interface. The exact operating voltage, clock requirements, transceiver pin assignments and electrical timing limits are not present in the supplied verified data and should be confirmed against the manufacturer datasheet. Typical applications include industrial Ethernet control systems, embedded routers, network-interface modules, factory equipment, building automation controllers and compact communications products. The MII support is useful when the host system expects the conventional parallel Ethernet interface, while RMII is generally preferable where connector density and PCB routing simplicity matter. The part is supplied in a surface-mount 48-SSOP package, allowing automated board assembly rather than through-hole insertion. When designing around the KSZ8721BA4, confirm the selected MII or RMII host interface, power architecture, clocking method, magnetic-interface implementation and Ethernet magnetics before layout release. Check the manufacturer datasheet for the exact reference circuit, decoupling requirements, termination values and pin names; these details are not specified in the supplied search results and should not be inferred from generic Ethernet transceiver designs. This product page combines the verified distributor and manufacturer information for the KSZ8721BA4 with practical interface-selection guidance, package details, sourcing context and a conservative replacement analysis. It is intended to help engineers identify the correct Ethernet transceiver and verify its mechanical, electrical and procurement requirements before committing a new design to production.

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KSZ8721BA4TR - 10/100 Ethernet Transceiver | Microchip Technology (Tape & Reel)
KSZ8721BA4TR

KSZ8721BA4TR - 10/100 Ethernet Transceiver | Microchip Technology (Tape & Reel)

The Microchip Technology KSZ8721BA4TR is a single-port 10/100 Mbps Ethernet transceiver with integrated Media Access Controller and Physical Layer functions, supporting both MII and RMII protocols in a 48-SSOP package. The device is intended for embedded networking equipment requiring a compact Ethernet interface and flexible host connectivity options. An Ethernet transceiver combines the physical-layer functions required to transmit and receive data over twisted-pair cabling with the MAC functions needed to organize frames and manage network access. The KSZ8721BA4TR can operate through either the Media Independent Interface, which provides a wider parallel data and control interface, or the Reduced Media Independent Interface, which uses fewer signals and is useful where board space and pin count are constrained. In the broader electronics hierarchy, this device is an interface IC, network transceiver, Ethernet PHY and MAC integration. Verified distributor information identifies the KSZ8721BA4TR as a 1/1 transceiver supporting full-duplex 10/100 Mbps Ethernet, MII and RMII protocols, and a 48-SSOP package. The single-port configuration allows one Ethernet network connection on an embedded controller or industrial system. Its support for both MII and RMII gives designers a choice between a more parallel host interface and a reduced-pin interface without changing the transceiver family. The integrated MAC and PHY arrangement reduces the external component count required for a basic Ethernet endpoint. In an RMII implementation, the host controller connects to the transceiver through the reduced interface, while the transceiver handles the physical signaling and network framing functions. In an MII implementation, the device exposes the additional parallel signals required by the fuller interface. The exact operating voltage, clock requirements, transceiver pin assignments and electrical timing limits are not present in the supplied verified data and should be confirmed against the manufacturer datasheet. Typical applications include industrial Ethernet control systems, embedded routers, network-interface modules, factory equipment, building automation controllers and compact communications products. The MII support is useful when the host system expects the conventional parallel Ethernet interface, while RMII is generally preferable where connector density and PCB routing simplicity matter. The part is supplied in a surface-mount 48-SSOP package, allowing automated board assembly rather than through-hole insertion. When designing around the KSZ8721BA4TR, confirm the selected MII or RMII host interface, power architecture, clocking method, magnetic-interface implementation and Ethernet magnetics before layout release. Check the manufacturer datasheet for the exact reference circuit, decoupling requirements, termination values and pin names; these details are not specified in the supplied search results and should not be inferred from generic Ethernet transceiver designs. This product page combines the verified distributor and manufacturer information for the KSZ8721BA4TR with practical interface-selection guidance, package details, sourcing context and a conservative replacement analysis. It is intended to help engineers identify the correct Ethernet transceiver and verify its mechanical, electrical and procurement requirements before committing a new design to production.

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KSZ8721BI - 2.5V 10/100 Ethernet PHY Transceiver | Microchip
KSZ8721BI

KSZ8721BI - 2.5V 10/100 Ethernet PHY Transceiver | Microchip

The Microchip Technology KSZ8721BI is a 2.5 V 10Base-T and 100Base-TX/FX Ethernet physical-layer transceiver with a 1/1 driver-receiver configuration and MII/RMII host interface. It is packaged in a 48-SSOP and is intended for low-voltage, low-power embedded Ethernet designs. According to the Microchip KSZ8721 product page, the device contains the 10Base-T physical medium attachment, 100Base-TX/FX PMD, and media-independent interface functions required to connect a network processor to copper or fiber media hardware. An Ethernet PHY is the analog and digital interface between a host controller and an Ethernet network medium. It converts logical MII or RMII data into differential 10Base-T or 100Base-TX signaling, receives and recovers incoming signals, and provides collision, carrier, and link-status information to the host. The KSZ8721 therefore sits between an Ethernet-capable microcontroller, application processor, or network controller and a magnetics-based Ethernet jack or an external fiber-media interface. The KSZ8721BI operates at 2.5 V to support low-voltage and low-power system requirements. Distributor records identify a 2.375 V to 2.625 V operating supply range, a 48-SSOP package, MII and RMII protocols, and a tube-style shipping format for the KSZ8721BI ordering code. Its 10/100 capability allows a design to support 10 Mbps or 100 Mbps operation while retaining a conventional MII path and an RMII option for host interfaces with fewer pins. The MII interface exposes separate control, data, and status signals in a parallel form, while RMII reduces the host-side signal count for a more compact implementation. Host-side selection depends on the controller's supported clock and data arrangement, so designers should verify MII-versus-RMII configuration against the system controller and required operating mode. The PHY also requires an appropriate clock reference and the correct external magnetics or fiber-media interface implementation. Typical uses include industrial controllers, embedded gateways, set-top boxes, print servers, and legacy Ethernet-equipped embedded systems. In a copper link, the device sits on the line side of an isolation transformer network. In a fiber-oriented design, its 100Base-FX capability can be combined with an external optical transceiver, although fiber-module and magnetics selection remain board-level responsibilities. The principal design consideration is the separation between host-side digital signals and line-side analog signaling. Keep MII or RMII routing short, provide clean clock distribution, use the required decoupling, and follow the manufacturer's reference layout for the media interface. Verify magnetics, termination, and isolation components against the selected 10Base-T or 100Base-TX network topology. This page consolidates manufacturer information, distributor pricing, and engineering guidance for the KSZ8721BI. It also documents verified parameter gaps instead of substituting unverified values, helping designers compare the device accurately before committing a PCB layout to production.

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KSZ8721BI-TR - 2.5V 10/100 Ethernet PHY Transceiver | Microchip (Tape & Reel)
KSZ8721BI-TR

KSZ8721BI-TR - 2.5V 10/100 Ethernet PHY Transceiver | Microchip (Tape & Reel)

The Microchip Technology KSZ8721BI-TR is a 2.5 V 10Base-T and 100Base-TX/FX Ethernet physical-layer transceiver with a 1/1 driver-receiver configuration and MII/RMII host interface. It is packaged in a 48-SSOP and is intended for low-voltage, low-power embedded Ethernet designs. According to the Microchip KSZ8721 product page, the device contains the 10Base-T physical medium attachment, 100Base-TX/FX PMD, and media-independent interface functions required to connect a network processor to copper or fiber media hardware. An Ethernet PHY is the analog and digital interface between a host controller and an Ethernet network medium. It converts logical MII or RMII data into differential 10Base-T or 100Base-TX signaling, receives and recovers incoming signals, and provides collision, carrier, and link-status information to the host. The KSZ8721 therefore sits between an Ethernet-capable microcontroller, application processor, or network controller and a magnetics-based Ethernet jack or an external fiber-media interface. The KSZ8721BI-TR operates at 2.5 V to support low-voltage and low-power system requirements. Distributor records identify a 2.375 V to 2.625 V operating supply range, a 48-SSOP package, MII and RMII protocols, and a tube-style shipping format for the KSZ8721BI-TR ordering code. Its 10/100 capability allows a design to support 10 Mbps or 100 Mbps operation while retaining a conventional MII path and an RMII option for host interfaces with fewer pins. The MII interface exposes separate control, data, and status signals in a parallel form, while RMII reduces the host-side signal count for a more compact implementation. Host-side selection depends on the controller's supported clock and data arrangement, so designers should verify MII-versus-RMII configuration against the system controller and required operating mode. The PHY also requires an appropriate clock reference and the correct external magnetics or fiber-media interface implementation. Typical uses include industrial controllers, embedded gateways, set-top boxes, print servers, and legacy Ethernet-equipped embedded systems. In a copper link, the device sits on the line side of an isolation transformer network. In a fiber-oriented design, its 100Base-FX capability can be combined with an external optical transceiver, although fiber-module and magnetics selection remain board-level responsibilities. The principal design consideration is the separation between host-side digital signals and line-side analog signaling. Keep MII or RMII routing short, provide clean clock distribution, use the required decoupling, and follow the manufacturer's reference layout for the media interface. Verify magnetics, termination, and isolation components against the selected 10Base-T or 100Base-TX network topology. This page consolidates manufacturer information, distributor pricing, and engineering guidance for the KSZ8721BI-TR. It also documents verified parameter gaps instead of substituting unverified values, helping designers compare the device accurately before committing a PCB layout to production.

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KSZ8721BL - 100Mbps Ethernet PHY | Microchip | LQFP-48
KSZ8721BL

KSZ8721BL - 100Mbps Ethernet PHY | Microchip | LQFP-48

The Microchip KSZ8721BL is a 3.3 V single-supply 10/100BASE-TX/FX Ethernet physical-layer transceiver with MII and RMII host interfaces, operating at up to 100 Mbps in a 48-pin LQFP package. It supports a 2.5 V core for low-voltage and low-power operation, includes automatic MDI/MDI-X crossover, and is intended for embedded Ethernet designs requiring copper twisted-pair or fiber connections. An Ethernet physical-layer transceiver, or Ethernet PHY, converts digital MAC data into electrical or optical signaling suitable for a network medium and converts received signals back into digital data. The PHY sits between a host controller and the physical network medium, commonly using an MII or RMII interface. The KSZ8721BL therefore belongs to the Ethernet interface hierarchy: transceiver, network interface controller companion, interface IC, and semiconductor. Key verified features include 100 Mbps operation, MII and RMII host-interface support, 10/100BASE-TX and 100BASE-FX capability, automatic MDI/MDI-X crossover, 3.3 V single-supply operation, and a 2.5 V core. The commercial temperature range is 0°C to +70°C. The reported supply current is 151 mA, while the exact pin mapping, package dimensions, transceiver electrical limits, and full timing values are not all available in the supplied excerpts. The device is suitable when an embedded processor, microcontroller, FPGA, or Ethernet controller needs an Ethernet media-access solution without implementing analog PHY circuitry on the PCB. Its RMII interface can reduce host-side wiring compared with MII, while MII support provides compatibility with systems designed around parallel Ethernet control signals. The integrated 2.5 V core is relevant to low-voltage processor ecosystems and power-conscious embedded equipment. Typical applications include industrial Ethernet equipment, embedded gateways, set-top boxes, printers, game or media systems, network adapters, and control systems with 10/100BASE-T connectivity. Fiber-capable 100BASE-FX support can also suit equipment intended for longer-distance point-to-point links when the required optical partner and external implementation are present. When designing around KSZ8721BL, confirm the exact package variant and pinout against the manufacturer datasheet, preserve the required decoupling and media-interface layout, and verify the external magnetics or fiber components required by the selected network medium. The supplied data confirms the commercial temperature grade and 48-pin LQFP option, but does not establish RoHS, REACH, AEC-Q100, or halogen-free status. This product page consolidates the verified manufacturer description, technical identifiers, source links, and application guidance into an engineering-oriented reference for the KSZ8721BL Ethernet PHY.

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KSZ8721BL-TR - 100Mbps Ethernet PHY | Microchip | LQFP-48 (Tape & Reel)
KSZ8721BL-TR

KSZ8721BL-TR - 100Mbps Ethernet PHY | Microchip | LQFP-48 (Tape & Reel)

The Microchip KSZ8721BL-TR is a 3.3 V single-supply 10/100BASE-TX/FX Ethernet physical-layer transceiver with MII and RMII host interfaces, operating at up to 100 Mbps in a 48-pin LQFP package. It supports a 2.5 V core for low-voltage and low-power operation, includes automatic MDI/MDI-X crossover, and is intended for embedded Ethernet designs requiring copper twisted-pair or fiber connections. An Ethernet physical-layer transceiver, or Ethernet PHY, converts digital MAC data into electrical or optical signaling suitable for a network medium and converts received signals back into digital data. The PHY sits between a host controller and the physical network medium, commonly using an MII or RMII interface. The KSZ8721BL-TR therefore belongs to the Ethernet interface hierarchy: transceiver, network interface controller companion, interface IC, and semiconductor. Key verified features include 100 Mbps operation, MII and RMII host-interface support, 10/100BASE-TX and 100BASE-FX capability, automatic MDI/MDI-X crossover, 3.3 V single-supply operation, and a 2.5 V core. The commercial temperature range is 0°C to +70°C. The reported supply current is 151 mA, while the exact pin mapping, package dimensions, transceiver electrical limits, and full timing values are not all available in the supplied excerpts. The device is suitable when an embedded processor, microcontroller, FPGA, or Ethernet controller needs an Ethernet media-access solution without implementing analog PHY circuitry on the PCB. Its RMII interface can reduce host-side wiring compared with MII, while MII support provides compatibility with systems designed around parallel Ethernet control signals. The integrated 2.5 V core is relevant to low-voltage processor ecosystems and power-conscious embedded equipment. Typical applications include industrial Ethernet equipment, embedded gateways, set-top boxes, printers, game or media systems, network adapters, and control systems with 10/100BASE-T connectivity. Fiber-capable 100BASE-FX support can also suit equipment intended for longer-distance point-to-point links when the required optical partner and external implementation are present. When designing around KSZ8721BL-TR, confirm the exact package variant and pinout against the manufacturer datasheet, preserve the required decoupling and media-interface layout, and verify the external magnetics or fiber components required by the selected network medium. The supplied data confirms the commercial temperature grade and 48-pin LQFP option, but does not establish RoHS, REACH, AEC-Q100, or halogen-free status. This product page consolidates the verified manufacturer description, technical identifiers, source links, and application guidance into an engineering-oriented reference for the KSZ8721BL-TR Ethernet PHY.

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KSZ8721BLI - 3.3V 10/100 Ethernet PHY | Microchip
KSZ8721BLI

KSZ8721BLI - 3.3V 10/100 Ethernet PHY | Microchip

Microchip KSZ8721BLI is a 3.3 V single-supply 10/100BASE-TX/FX Ethernet physical-layer transceiver with full MII and RMII host interfaces, supplied in a 48-LQFP 7x7 mm package. The device operates at 10 Mbps and 100 Mbps and supports 10BASE-T copper, 100BASE-TX copper, and 100BASE-FX fiber media through integrated physical-layer functions. Its low-voltage 2.5 V to 3.3 V operating capability is intended to reduce system power while supporting 10BASE-T/100BASE-TX/FX network connections. An Ethernet physical-layer transceiver, or Ethernet PHY, converts digital frame data into electrical or optical signaling suitable for a network medium. In the hierarchy of network semiconductors, the PHY sits below the Ethernet controller or media-access controller and above the transformer, connector, or fiber interface. The KSZ8721BLI also provides an MDI/MDI-X auto-crossover function, allowing copper links to use a standard straight-through cable arrangement without manual crossover configuration. The KSZ8721BLI combines 10BASE-T and 100BASE-TX/FX support in one transceiver while offering both MII and RMII host connectivity. Full MII provides a parallel interface for legacy or higher-bandwidth controller arrangements, whereas RMII reduces the number of host-side signals and is useful in space-constrained embedded systems. The single 3.3 V supply architecture simplifies power design, although interface voltage compatibility must still be checked against the selected host controller. The device is positioned for industrial embedded networking, where a 10/100 Mbps copper or fiber link can be added without implementing the complete Ethernet data path in the host. Its industrial temperature option is identified by the KSZ8721 family documentation, which lists a -40°C to +85°C industrial range. Package construction is surface-mount LQFP, allowing conventional PCB assembly and inspection while requiring careful pin-1 orientation and solderability checks. Typical uses include industrial controllers, factory automation equipment, embedded gateways, serial-to-Ethernet systems, media converters, and compact network appliances. For copper links, designers must add the appropriate isolation transformer and RJ-05 or shielded-jack hardware. For fiber links, the external optical components and interface requirements should be implemented according to the manufacturer application guidance rather than inferred from the PHY package alone. The main design consideration is interface verification. Confirm that the host controller supports the selected MII or RMII mode, the transceiver’s supply voltage, and the external magnetics required by the target copper or fiber network. This page consolidates the verified source links, pricing observation, package information, replacement data, and engineering considerations into a practical procurement and design reference.

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