ইন্টারফেস IC
উপশ্রেণী
পণ্য (2,300+)
KSZ8041FTL - 10/100 Ethernet PHY with 100BASE-FX | Microchip
The Microchip Technology KSZ8041FTL is a single-supply 10Base-T, 100Base-TX, and 100Base-FX Ethernet physical-layer transceiver with MII, RMII, and SMII interfaces, supplied in a 48-pin 7 x 7 mm TQFP package. Its 3.135 V to 3.465 V supply range, one transmitter and one receiver, and automatic MDI/MDI-X handling support copper and fiber Ethernet connectivity. An Ethernet physical-layer transceiver, commonly called an Ethernet PHY, converts digital data from a network controller into electrical or optical-signaling-compatible signals for the physical medium. The KSZ8041 belongs to the Ethernet interface IC hierarchy, combining a 10/100 Ethernet MAC interface with mixed-signal circuitry for 10Base-T, 100Base-TX, and 100Base-FX physical channels. The KSZ8041FTL adds 100Base-FX support to the feature set of the KSZ8041TL. This makes the FTL suitable for fiber links, media converters, and equipment that needs one Ethernet PHY to address copper and fiber interfaces. Automatic crossover handling through HP Auto MDI/MDI-X removes the need to distinguish straight-through and crossover cables in conventional copper installations. Its mixed-signal design is intended to extend signaling distance while reducing power consumption. The device supports full MII, reduced MII, and serial MII connectivity, allowing integration with network controllers operating at different interface rates and pin requirements. The 48-pin lead-free TQFP package provides a conventional surface-mount footprint for industrial and embedded Ethernet equipment. Typical uses include 10/100 industrial Ethernet controllers, fiber-to-copper media converters, embedded gateways, network switches, test equipment, and communication equipment requiring a single PHY with both copper and fiber support. Evaluation is supported by the Microchip KSZ8041FTL-EVAL platform, while the KSZ8041TL-FTL evaluation board covers the related TL and FTL devices. A critical design consideration is validating the selected media mode, PHY address straps, and interface configuration at power-up. The manufacturer hardware design checklist specifically identifies reset-time strap behavior and warns that receive inputs can affect strap latching, so external hardware and software sequencing must follow the manufacturer guidance. This page combines manufacturer-supported interface and package information with distributor availability references, practical application guidance, and engineering-focused comparison data. It also distinguishes exact verified facts from parameters that require confirmation from the current manufacturer datasheet before a new PCB or production release is approved.
KSZ8041NLI-TR - 10/100 Ethernet PHY | Microchip
Microchip Technology KSZ8041NLI-TR is a single-supply 10Base-T/100Base-TX Ethernet physical-layer transceiver with MII and RMII interfaces, operating from a single 3.3 V supply and packaged in a 32-QFN 5x5 mm package. It supports one Ethernet channel at 10 Mbps or 100 Mbps and includes the mixed-signal circuitry required to connect a network medium interface to a digital Ethernet controller. An Ethernet PHY, or physical-layer transceiver, converts digital frame data into electrical signaling for a 10/100 Ethernet link and converts received link signals back into data for the host controller. The KSZ8041 sits between an Ethernet MAC or microcontroller with MII/RMII support and the transformer-coupled network interface, providing the physical signaling layer required by IEEE 802.3 Ethernet designs. Key verified features include 10/100Base-TX operation, full MII and RMII interface support, single-supply operation, and a 32-QFN package measuring 5x5 mm. The manufacturer describes a mixed-signal design intended to extend signaling distance while reducing power consumption. The part is identified by the -TR ordering suffix and is listed in tape-and-reel commercial distribution channels. The interface architecture makes the KSZ8041 suitable for embedded Ethernet designs, including industrial controllers, embedded processors, set-top boxes, access equipment, and other systems that require a 10/100 Ethernet physical layer. MII support suits designs requiring separate transmit and receive data paths, while RMII can reduce the number of digital interface signals when supported by the host controller. When placing the device, follow the manufacturer package and land-pattern requirements, provide the specified decoupling and Ethernet magnetics interface components, and route high-speed or high-current network-side connections according to the applicable reference design. The exact pin names, pin functions, electrical limits, and recommended external-component values require confirmation from the official manufacturer datasheet before layout release. This page consolidates verified manufacturer and distributor information for KSZ8041NLI-TR and distinguishes confirmed product facts from parameters that were not included in the supplied search data. It is intended to support component identification, sourcing, and preliminary engineering review rather than replace the complete Microchip datasheet.
KSZ8041RNL - 10/100BASE-TX RMII PHY | Microchip Technology
The Microchip Technology KSZ8041RNL is a single-supply 10BASE-T/100BASE-TX physical-layer transceiver with a full RMII interface, operating from 3.135 V to 3.465 V in a 32-VFQFN exposed-pad package measuring 5 mm by 5 mm. It accepts a 25 MHz crystal as its input reference clock and supplies a 50 MHz RMII reference clock to the media access controller, eliminating the need for a separate 50 MHz system clock. The device supports one transmit driver and one receive receiver and uses a mixed-signal design intended to extend Ethernet signaling distance while reducing power consumption. An Ethernet PHY is the physical-layer interface between a media access controller and a copper Ethernet network. Within the hierarchy of Ethernet controllers, PHYs, interface transceivers, and semiconductors, the KSZ8041RNL converts digital MAC data into differential 10BASE-T or 100BASE-TX signals and converts received Ethernet signals back into RMII digital data. The RMII interface reduces the number of parallel data signals required between the PHY and MAC while supporting 100 Mb/s operation. The key features include support for both 10BASE-T and 100BASE-TX networks, an RMII-only configuration, a 25 MHz input reference, and a generated 50 MHz RMII reference output. According to the Microchip datasheet 00002245B, the RNL version is an enhanced RMII implementation that does not require a 50 MHz system clock. Microchip also identifies automatic MDI/MDI-X capability in the KSZ8041 product family, reducing the need for manual crossover handling. The mixed-signal architecture separates the digital control and clock paths from the analog line-driver and receive functions. This is important in compact embedded systems because the Ethernet magnetics, crystal, decoupling network, and high-speed digital RMII traces all influence signal integrity. Power-supply noise and imperfect clock routing can therefore affect otherwise correct firmware and media-access-controller configurations. Typical uses include embedded Linux systems, industrial controllers, set-top boxes, access equipment, printers, and embedded network bridges that connect a conventional RMII MAC to a 10/100 Ethernet network. The part can also support a design needing the MAC to receive a stable 50 MHz reference generated by the PHY. The manufacturer product page lists related KSZ8041 variants for MII, SMII, RMII, and fiber support, so interface requirements should be checked before substitution. Designers should provide the specified crystal, clock-support components, Ethernet transformer, decoupling capacitors, and a layout that keeps sensitive analog and differential Ethernet traces isolated from noisy digital circuitry. The power-up strapping pins configure speed, duplex, auto-negotiation, power-down behavior, and PHY address, and their values are latched during reset. The hardware design checklist should be followed because incorrect strap resistors or reset timing can produce an unintended operating mode even when the clock and power rails are correct. This page combines the verified Microchip datasheet details, distributor availability, package information, interface distinctions, and practical migration considerations in a format that helps engineers evaluate the KSZ8041RNL before PCB layout or a second-source decision.
KSZ8041TL 10/100 Ethernet PHY | Microchip | TQFP-48
The Microchip Technology KSZ8041TL is a single-supply 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with MII, RMII, and SMII interfaces, supplied in a 48-TQFP package. It supports 10 Mb/s and 100 Mb/s copper Ethernet and combines transmit, receive, clock, and management functions for embedded network equipment. The verified manufacturer material identifies a mixed-signal design intended to extend signaling distance while reducing power consumption, plus HP Auto MDI/MDIX capability. An Ethernet physical-layer transceiver, or PHY, converts digital MAC data into signals suitable for twisted-pair cabling and converts received cable signals back into digital data. The KSZ8041 belongs to the Ethernet interface IC hierarchy, connecting a network media-access controller to a 10BASE-T or 100BASE-TX copper link. Its MII, RMII, and SMII support lets designers select an interface appropriate to the host controller and board constraints. The KSZ8041TL provides separate 10BASE-T and 100BASE-TX operation, automatic cable-related handling, and support for HP Auto MDI/MDIX according to the Microchip product page. These features simplify connection to standard Ethernet magnetics and network transformers without requiring a fixed transmit/receive crossover configuration. The verified sources also describe the KSZ8041TL as a low-power physical-layer solution enabled by a mixed-signal architecture. The manufacturer datasheet describes INTRP on pin 32 as an optional interrupt signal for informing an external controller that the PHY register has received a status update. This makes the device suitable for designs requiring PHY-status monitoring alongside packet transmission and reception. The digital host interface can be used with controllers that support MII, RMII, or SMII, subject to the voltage, timing, and pin requirements in the device documentation. Typical uses include industrial Ethernet controllers, embedded gateways, printers, set-top equipment, network interface cards, media-conversion equipment, and industrial control systems. The TL variant is intended for copper-based 10BASE-T/100BASE-TX links; the related KSZ8041FTL adds 100BASE-FX support, so it is not a drop-in functional substitute unless the PCB and magnetics are specifically designed for fiber. For a new layout, follow the manufacturer pinout and reference-circuit recommendations exactly, especially the supply bypass capacitors, crystal or clock network, Ethernet differential pairs, and isolation or magnetics interface. Keep the digital MII/RMII/SMII traces away from the analog magnetics-side circuitry, maintain the specified impedance environment, and provide clean power referenced to the device ground. Confirm the exact package variant, temperature range, and ordering suffix before releasing a PCB.
KSZ8041TLI - 10/100 Ethernet PHY | Microchip Technology
The Microchip Technology KSZ8041TLI is a single-channel 10Base-T/100Base-TX Ethernet physical-layer transceiver with full MII, RMII, and SMII interfaces, supplied in a 48-pin TQFP package. The device operates from a single 3.3 V supply and supports IEEE 802.3 and IEEE 802.3u Ethernet operation at 10 Mbps and 100 Mbps. Its integrated mixed-signal design is intended to extend signaling distance while reducing power consumption in compact embedded networking equipment. An Ethernet PHY is the physical-layer component that converts digital data from a MAC or Ethernet controller into analog signaling for a copper network, while receiving and converting incoming signals back into digital data. In the broader hierarchy, the KSZ8041TLI is an Ethernet interface transceiver, a network interface IC, and a semiconductor for Ethernet connectivity. It is appropriate for industrial control, embedded systems, communications equipment, and other designs requiring a dedicated 10/100 Ethernet front end. The verified device information identifies support for auto-negotiation through hardware pin strapping on pin 42 or software using register 0h bit 12. Auto-negotiation follows Clause 28 of the IEEE 802.3u specification and allows link partners to select the highest common operating mode. The same 48-pin TQFP package also supports MII, RMII, and SMII host interfaces, allowing designers to match the PHY to different MAC architectures. The KSZ8041TLI is designed for surface-mount implementation and uses a 3.3 V single-supply architecture. Its mixed-signal approach supports the 10Base-T and 100Base-TX physical layers while controlling power use compared with discrete implementations. The product page also identifies HP Auto MDI/MDIX support, which simplifies connection to both straight-through and crossover cable arrangements in many network designs. Typical uses include embedded Ethernet controllers, industrial automation modules, serial-to-Ethernet equipment, printer controllers, set-top boxes, and communication appliances. When designing around this PHY, verify the exact MAC interface mode, pin strapping requirements, magnetics selection, and termination network against the manufacturer datasheet. The verified data confirms the functional family and package but does not provide a complete pin list, recommended magnetics part numbers, or detailed timing values. This product record combines verified distributor and manufacturer information with practical interface-selection guidance, same-package alternatives, pricing context, and design cautions. The comparison and notes help distinguish temperature, packaging, and interface-option differences without treating functionally similar parts as automatically drop-in replacements.
KSZ8081MNXIA-TR - 10/100 Ethernet PHY | Microchip
The Microchip Technology KSZ8081MNXIA-TR is a single-supply 10Base-T/100Base-TX Ethernet physical-layer transceiver in a 32-QFN 5 x 5 mm package. The verified distributor listing identifies it as a one-transceiver Full MII Ethernet device for transmitting and receiving data over standard CAT-5 unshielded twisted-pair cable. Its integrated PHY reduces board space by combining the physical-layer functions required for a 10/100 Ethernet copper interface. What is an Ethernet PHY? An Ethernet physical-layer transceiver converts digital data from a network controller into electrical signaling for twisted-pair cabling and converts received cable signals back into digital data. A 10Base-T/100Base-TX PHY supports 10 Mbps and 100 Mbps Ethernet operation over CAT-5 UTP, while the host interface connects the PHY to a network controller or embedded processor. In the hierarchy of semiconductor components, the KSZ8081 is an Ethernet interface IC, then a network physical-layer transceiver, then a communication semiconductor. The verified product information specifies a 32-QFN 5 x 5 mm package and single-supply operation. The KSZ8081 family is designed for compact Ethernet equipment, embedded systems, industrial controllers, communications equipment, and network interface designs. Its 10/100 capability provides compatibility with legacy 10 Mbps networks as well as Fast Ethernet links. The Full MII designation in the verified DigiKey listing identifies the host-side interface category; detailed pin functions, voltage ranges, temperature limits, and timing parameters must be taken from the manufacturer datasheet. The KSZ8081MNXIA-TR is intended for designs using Ethernet magnetics and an RJ45 connector. The verified manufacturer product page describes support for transmission and reception over standard CAT-5 UTP. Hardware design must preserve the differential TX and RX pairs, provide the required decoupling, and follow the KSZ8081 hardware design guidance. Microchip's published KSZ8081 hardware design checklist notes that pin 2 of the RJ45 is RX- and should route through the magnetics to RXM pin 4 of the KSZ8081MNX when using the specified arrangement. A key design consideration is that Ethernet PHY operation depends on a clean 3.3 V supply, correct magnetics, controlled impedance, and compliant physical-layer layout. Use the manufacturer datasheet and hardware design checklist for the authoritative pinout, exposed-pad connection, capacitor values, supported media, and interface timing. Do not infer undocumented electrical values from distributor descriptions. This page combines verified distributor identity and package information with manufacturer-level application context and practical Ethernet layout guidance for engineers evaluating the KSZ8081MNXIA-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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
KSZ8721BT - 10/100 Ethernet PHY Transceiver | Microchip
The Microchip Technology KSZ8721BT 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.
KSZ8721CL - 10/100 Ethernet PHY, MII, 48-LQFP | Microchip
The Microchip Technology KSZ8721CL is a single-port 10BASE-T, 100BASE-TX, and 100BASE-FX Ethernet physical-layer transceiver with MII and RMII host interfaces, a 3.3 V supply, and a 48-LQFP 7 x 7 mm package. The verified distributor information identifies one transmitter and one receiver, Full MII operation, and tray packaging. An Ethernet PHY is the physical-layer interface between a network MAC and copper or fiber cabling. It converts digital MAC data into electrical signaling for 10/100 Ethernet networks and receives incoming signals for recovery by the MAC. The KSZ8721 family therefore belongs to the Ethernet interface IC and physical-layer transceiver hierarchy, supporting 10BASE-T copper, 100BASE-TX copper, and 100BASE-FX optical-fiber links. The KSZ8721 supports 3.3 V single-supply operation and is described by Microchip as operating from 2.5 V to meet low-voltage and low-power requirements. Its mixed-signal design is intended to extend signaling distance while reducing power consumption. The available data confirms MII and RMII host-interface options, but individual MII clock rates, RMII timing limits, transceiver insertion loss, crossover support, and link-distance limits are not supplied here and require manufacturer-datasheet confirmation. Typical implementation roles include industrial Ethernet controllers, embedded network equipment, single-port Ethernet switches, print servers, and communication equipment. In an MII design, the PHY interfaces through parallel digital signals to a MAC or switch engine; in an RMII design, it uses the reduced pin-count interface specified by the host controller. The 48-LQFP package provides 48 external connections but requires careful high-speed signal layout. A key design consideration is that Ethernet PHY performance depends as much as the IC on magnetic-interface components, crystal timing, controlled-impedance PCB routing, supply bypassing, and isolation from noisy switching circuitry. Verify the exact transceiver mode, pin names, recommended magnetics, termination, and reference schematic against the current Microchip datasheet before layout release. This product data consolidates verified distributor availability, package information, interface capabilities, and technical-source links with application guidance and transparent data-gap markers. It is intended to accelerate sourcing and initial engineering review without replacing the manufacturer datasheet or schematic-level validation.
KSZ8721SLI - 10/100 Ethernet PHY | Microchip Technology
Microchip Technology KSZ8721SLI is a single-channel 10/100 Ethernet physical-layer transceiver with a 48-SSOP package, operating from a 2.5 V core and supporting a 3.3 V single-supply application. It provides separate 10Base-T and 100Base-TX/FX physical-medium functions plus MII and RMII host interfaces for transmitting and receiving Ethernet data. The device supports 10 Mbps and 100 Mbps operation and is intended for embedded networking equipment requiring a dedicated Ethernet PHY. An Ethernet physical-layer transceiver, or Ethernet PHY, converts logical digital data into electrical signaling for a physical network medium. The KSZ8721SLI belongs to the integrated-circuit hierarchy physical-layer transceiver > Ethernet interface IC > interface IC. Its 10Base-T capability supports legacy 10 Mbps copper Ethernet, while 100Base-TX/FX supports Fast Ethernet over twisted pair or optical-fiber-compatible links. The MII and RMII interfaces allow a host processor or network controller to connect through either a parallel media-independent interface or the more pin-efficient reduced media-independent interface. Key verified features include full IEEE 802.3 operation, support for 10Base-T, 100Base-TX, and 100Base-FX physical media, and both MII and RMII host connectivity. The KSZ8721 operates its core at 2.5 V to address low-voltage and low-power requirements, while the device is described as a 3.3 V single-supply transceiver. Its 48-SSOP package provides enough pins for separate transmit, receive, management, clock, and host-interface functions. Technically, the KSZ8721SLI consolidates a 10Base-T physical medium attachment function, a 100Base-TX/FX physical medium attachment function, and the associated host-facing digital interface into one package. MII exposes a wider parallel bus, while RMII reduces the number of host-interface signals and is commonly preferred when the connected controller supports it. The manufacturer identifies the KSZ8721 family as a 10BaseT, 100BaseTX, and FX physical-layer transceiver designed for low-power embedded networking. Typical uses include industrial Ethernet controllers, embedded gateways, set-top equipment, printer and scanner interfaces, test equipment, and OEM network appliances. A board designer can connect the KSZ8721SLI to an Ethernet transformer or appropriate fiber interface, provide the required decoupling, and connect it to an MII- or RMII-capable controller. The choice of media interface and magnetics should be based on the required copper or fiber link distance and system compliance targets. A critical design consideration is confirming the controller's MII or RMII timing, clock requirements, reset behavior, and supported media type against the manufacturer datasheet before layout release. Input and output supply rails should be decoupled close to the device, while the copper or fiber network path should be routed according to the selected magnetics and medium requirements. Do not infer unverified pin assignments or timing values from distributor listings alone. This page consolidates verified manufacturer and distributor information, package details, commercially relevant sourcing links, and same-family replacement evidence. It also provides application guidance and comparison context intended to support faster component selection without treating unreported electrical parameters as verified facts.
KSZ8851SNL - 10/100 Ethernet Controller | Microchip
The Microchip Technology KSZ8851SNL is a single-port 10/100 Ethernet controller with a 3.3 V SPI interface, integrated 10/100BASE-T/TX PHY, and Media Access Controller in a 32-pin QFN package measuring 5 mm x 5 mm. It provides 10 Mbps and 100 Mbps Ethernet connectivity for embedded systems using a host microcontroller equipped with an SPI interface. The device also includes one copper port and one uplink port, making it suitable for industrial, communications, building-automation, and networked embedded-control equipment. An Ethernet controller is an interface IC that integrates network-frame handling with physical-layer signaling. The KSZ8851 family combines the PHY and MAC with an SPI host interface, reducing the number of external components required to add wired Ethernet to a microcontroller-based product. This integration places the KSZ8851 within the hierarchy of Ethernet controller, network interface controller, interface IC, and semiconductor. Its SPI host interface supports a compact connection to embedded processors while preserving an independent Ethernet data path. The principal verified features are 10/100BASE-T/TX operation, a 3.3 V supply as identified by the distributor specification snippet, and a 32-pin lead-free QFN package. The integrated controller architecture simplifies firmware and hardware compared with a separated Ethernet MAC and external PHY arrangement. A single-port design also keeps board area and component count controlled, which is valuable in embedded products where connector placement, enclosure volume, and system cost are constrained. Technically, the KSZ8851SNL separates host access from Ethernet processing through its Serial Peripheral Interface. The SPI interface provides a compact communication path for register access, configuration, interrupt handling, and Ethernet data transfer. The integrated PHY handles the physical signaling required for 10/100BASE-T/TX copper networking, while the MAC performs the higher-level frame-processing functions required to present Ethernet traffic to the host processor. Typical applications include industrial Ethernet gateways, building-automation controllers, serial-to-Ethernet equipment, embedded test systems, HMI platforms, and network-connected sensors. It is also appropriate for custom industrial control equipment requiring a dedicated Ethernet port without allocating a high-performance host processor for basic Ethernet connectivity. The 5 mm x 5 mm QFN package supports compact designs, although exposed-pad layout and thermal management remain PCB-level concerns. Designers should follow Microchip's KSZ8851SNL Hardware Design Checklist for power, decoupling, magnetics, differential routing, and copper interface implementation. SPI trace integrity, grounding, and isolation requirements must be reviewed alongside the Ethernet physical layer because the controller is intended for copper-connected industrial networks rather than direct cable attachment without supporting network hardware.