Circuits intégrés d'interface
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Produits (1568)
JHL8440-S-RKFK - Thunderbolt 4 Quad Port Controller | Intel
The Intel JHL8440-S-RKFK is a Thunderbolt 4 controller in the quad-port device configuration, implementing Intel's Thunderbolt 4 (formerly codenamed Goshen Ridge) protocol on a 40 Gbps-capable physical layer in an FC-CSP package. Positioned as a system-on-chip for host platforms, docks, and accessory enclosures, the JHL8440 integrates USB4, DisplayPort 1.4a, and PCIe Gen3 tunneling while maintaining backward compatibility with Thunderbolt 3, USB 3.x, and legacy DP Alt Mode peripherals. Background Knowledge: A Thunderbolt 4 controller is a high-speed I/O interface IC that aggregates multiple industry-standard protocols - USB, DisplayPort, PCI Express, and Thunderbolt - onto a single USB Type-C connector. In the broader IC taxonomy, a Thunderbolt 4 controller is a specialized type of interface controller (an I/O Controller Interface IC) that sits between a system CPU/GPU and an external Type-C port, performing protocol translation, lane mapping, and power-role negotiation. Intel's Goshen Ridge family (JHL8440/JHL8540/JHL8340) and the older Titan Ridge (JHL7440/JHL7540/JHL7340) constitute the two principal generations of discrete Thunderbolt controllers. Compared with USB3 controllers, Thunderbolt 4 controllers expose 40 Gbps of bidirectional bandwidth and mandate stricter device-class certification by Intel. Key features include four PCIe Gen3 lanes for downstream tunneling, dual DisplayPort 1.4a inputs supporting 8K video aggregation, integrated USB4 v2 routing logic, DMA-based tunneling for USB 3.2 Gen2x1 (10 Gbps), and Intel VT-d compatible DMA protection for downstream security. The quad-port variant supports one upstream host port and up to four downstream device-side ports, enabling multi-display docking configurations. Compliance with Thunderbolt 4 mandates USB4 Gen3x2 (20 Gbps) minimum, mandatory DMA protection, and 32 Gbps PCIe tunnel reservation. Architecture: The JHL8440 is built on a low-power process and uses a hardened Type-C PHY plus a multi-protocol mux fabric. Boot firmware is hosted on an attached SPI flash; SMBus is used for host attach. Power delivery (PD 3.0) is mediated through a companion PD controller such as the JHL8040. The 'S-RKFK' suffix denotes the tape-and-reel, FC-CSP (Flip-Chip Chip-Scale Package) variant supplied on production reels. Typical applications include Thunderbolt 4 docks, premium notebooks, mini-PCs, high-end motherboards, single-cable docking stations with multi-display support, and PCIe external enclosures (eGPU / NVMe). Lower-port-count variants (JHL8340, JHL8540) target two-port hosts. Design consideration: Use the JHL8440 only when the system requires four Thunderbolt ports; the dual-port JHL8340 saves cost and PCB area in compact two-port designs. Validate PCIe lane mapping against the platform's internal topology because misrouted Gen3 lanes can halve effective throughput. This page synthesizes Intel ARK specifications, cross-reference notes for the Goshen Ridge family, and dock-design guidance not bundled in the manufacturer datasheet.
JHL9580 - Thunderbolt 5 Dual Port Host Controller | Intel
The Intel JHL9580 (formerly Barlow Ridge) is a Thunderbolt 5 dual-port host controller designed for desktop add-in cards, mobile platforms, and high-end docking stations. It implements Thunderbolt 5 on a PCIe 4.0 x4 host interface and supports dual USB Type-C downstream ports with up to 80 Gb/s bi-directional bandwidth (120 Gb/s single-direction in asymmetric mode), plus DisplayPort 2.1 with 8K@60Hz passthrough and USB PD 3.1 charging up to 100 W per port. A Thunderbolt controller is a high-speed I/O protocol chip that aggregates PCI Express, DisplayPort, USB, and power delivery onto a single USB Type-C connector. Within the host-side I/O hierarchy, JHL9580 sits below the platform chipset PCIe root complex and above the physical USB-C receptacle, translating PCIe packets and DP lanes into Thunderbolt 5 tunnels for downstream peripherals, storage, and displays. Key features include PCIe 4.0 x4 upstream connectivity, dual Thunderbolt 5 / USB4 v2 Type-C ports, downstream daisy-chain support for up to 5 devices per port (10 devices total), DisplayPort 2.1 with UHBR20 link training, and USB PD 3.1 EPR signaling. The controller is fabricated as an FC-CSP (Flip-Chip Chip-Scale Package) with a compact footprint suitable for M.2 add-in cards and half-length PCIe boards. According to Intel's product brief, JHL9580 supports dynamic bandwidth rebalancing between its two ports for asymmetric traffic patterns. Architecturally, JHL9580 uses Intel's fifth-generation Thunderbolt silicon (Barlow Ridge) with updated re-timers and enhanced DP 2.1 muxing. It maintains protocol compatibility with Thunderbolt 4 (JHL9540) and Thunderbolt 3 ecosystems downstream, enabling legacy docking and storage backward compatibility. The PCIe 4.0 x4 host interface doubles upstream bandwidth compared to the prior generation Thunderbolt 4 controllers (which were limited to PCIe 3.0 x4). Typical applications include Thunderbolt 5 add-in cards for desktop workstations, premium docking stations, external GPU enclosures, 8K/120 Hz capture rigs, and ultra-fast NVMe RAID enclosures. The 80 Gb/s symmetric / 120 Gb/s asymmetric bandwidth makes it ideal for uncompressed video pipelines and high-throughput storage workloads. The same silicon is also offered in lower-cap configurations (JHL9540 / JHL9440 / JHL9480) with bandwidth caps at 40 Gbps. When designing with JHL9580, ensure the platform provides a PCIe 4.0 capable slot and adequate auxiliary power (typically the Aux rail for the add-in card). Board layout must follow Intel's USB Type-C routing guidelines with length-matched differential pairs for the high-speed channels. This page consolidates Intel ordering information, Mouser/Octopart pricing, FC-CSP pin map, and Thunderbolt-ecosystem alternatives not found on a single distributor listing.
JHL9580-S-RN7W - Thunderbolt 5 Dual Port Host Controller | Intel
The Intel JHL9580-S-RN7W is a Thunderbolt 5 host controller (Dual Port Host configuration) implemented as an FC-CSP (Flip-Chip Chip-Scale Package) IC and shipped in tray packaging. It is the silicon that brings Thunderbolt 5 connectivity (80/120 Gbps) to high-end client and workstation platforms, providing two downstream Thunderbolt 5 ports that can simultaneously tunnel USB4, DisplayPort, and PCIe. A Thunderbolt controller is a high-speed I/O controller that aggregates multiple industry-standard protocols - USB4, DisplayPort 1.4a/2.1, and PCIe - onto a single reversible USB-C physical connector. In the host-controller hierarchy, the JHL9580 sits between the platform's PCIe root complex and the external USB-C ports, acting as both a protocol multiplexer and a USB-PD-aware power negotiator. It is paired with a discrete companion retimer on longer cable runs. Key features include Thunderbolt 5 signaling at 80/120 Gbps, USB4 v2 compliance, dual downstream USB-C/Thunderbolt ports, integrated USB Power Delivery 3.1 negotiation, and DisplayPort 2.1 alt-mode support. The FC-CSP package enables the high-density BGA-style pinout needed for multi-lane signaling while keeping the die footprint compact for 2-in-1 and thin laptop designs. Technically, the JHL9580 uses Intel's proven Barlow Ridge / Thunderbolt 5 protocol engine, which is a derivative of the Thunderbolt 4 family. It implements PAM-3 signaling at 40 Gbps per lane (×3 lanes for 120 Gbps asymmetric / ×2 lanes for 80 Gbps symmetric), enabling up to 120 Gbps of receive bandwidth for display-intensive workloads such as 8K HDR or uncompressed multi-monitor docks. Typical applications include high-end workstations and content-creation laptops, Thunderbolt 5 docks, eGPU enclosures, pro video I/O cards, AR/VR tethering, and enterprise docking stations. The dual-port host configuration is ideal for desktop-replacement notebooks that need to drive two external Thunderbolt chains simultaneously. When designing with this controller, ensure the platform PCIe lane mapping and USB-PD firmware match the JHL9580 reference design; BIOS/firmware (IUP - Intel Update Program) and the companion retimer IC must be co-validated. Compliance and interoperability certification with the Thunderbolt 4/5 logo program is required before end-product branding. This page synthesizes Intel product-page specifications, Mouser distributor data, and Intel community guidance into a single reference that complements the official Thunderbolt 5 ordering and support documentation.
JHL9580-S-RN7X - Thunderbolt 5 Dual-Port Host Controller | Intel
The Intel JHL9580-S-RN7X is a Thunderbolt 5 dual-port host controller housed in an FC-CSP (Foundry Chip-Scale Package) and shipped in Tape & Reel packaging. It is the dedicated host-side controller in Intel's Thunderbolt 5 silicon family, designed to deliver 80/120 Gb/s bidirectional bandwidth over USB-C while remaining software- and pin-compatible with the JHL9580 series. A Thunderbolt host controller is a high-speed I/O controller that aggregates DisplayPort, PCIe, and USB4/USB3 protocols onto a single USB-C connector. The JHL9580 sits in the platform's PCH-to-Type-C signal path, performing protocol multiplexing, lane negotiation, and power delivery (PD) messaging. As the host controller, it works in tandem with the companion JHL9580 device controller (for peripherals/docks) to deliver full Thunderbolt 5 feature parity. Key features of the JHL9580 include dual USB-C/Thunderbolt ports, 80 Gb/s standard asymmetric bandwidth with up to 120 Gb/s boost mode (Bandwidth Boost for video-intensive workloads), DisplayPort 2.1 passthrough, USB4 v2 compliance, backward compatibility with Thunderbolt 4/3 and USB3, and integrated USB Power Delivery 3.1 support. The FC-CSP package enables compact mobile and desktop implementations where board real-estate is constrained. The JHL9580-S-RN7X is typically paired with an Intel Core, Core Ultra, or equivalent host CPU and a discrete PCIe Gen4 x4 upstream link. It targets premium laptops, workstations, gaming notebooks, and high-end desktops that need multi-display 8K/120 Hz capability and sub-second large-file transfers over TB5. Typical applications include Thunderbolt 5 docking stations, high-bandwidth external NVMe enclosures, multi-display 8K workstations, content-creation laptops, and pro-grade capture/playback rigs. Per Intel, connectivity and throughput depend on OEM implementation. When designing with this part, ensure the host CPU supports the required PCIe lane configuration and that firmware (BIOS/NVMe) has been validated for TB5. Thermal management is essential because the FC-CSP package dissipates significant power under sustained 120 Gb/s boost operation. This page synthesizes distributor availability, the official Intel SKU 225921 spec sheet, and drop-in alternatives not consolidated in the manufacturer datasheet.
JMB575 - SATA 6Gb/s 5-Port Multiplier Chip | JMicron
The JMicron JMB575 is a single-chip SATA 6Gb/s Port Multiplier / Port Selector controller integrating six high-speed Serial I/O blocks, six independent SATA upper layers, an embedded microprocessor, SRAM, and PROM in a 64-pin QFN package. A SATA port multiplier is a storage bridging device that allows multiple SATA drives to share a single host SATA link using FIS-based switching defined by the SATA specification. Within the storage-IC hierarchy (interface controller -> SATA bridge -> storage controller), the JMB575 sits between one host SATA 6Gb/s port and up to five device ports, arbitrating traffic without host software changes. Key features include 1-to-5-port Port Multiplier mode, 5-to-1-port Port Selector mode, SATA 6Gb/s (SATA III) line rates on all six serial channels, and fully embedded firmware - the chip boots from internal PROM and SRAM with no external flash required. An external flash interface is available for custom firmware when extended capability is needed. Architecturally, the JMB575 combines six serial I/O macrocells with six SATA protocol engines and an on-chip microprocessor that runs JMicron's embedded firmware. Cascaded mode allows multiple JMB575 devices to be chained, connecting up to 15 drives to a single host port - useful in multi-bay enclosures where each cascade level shares the 6Gb/s host bandwidth. Typical applications include multi-bay DAS (direct-attached storage) enclosures, NAS backplane expansion behind a 6-port SATA host controller such as ASMedia ASM1166, external USB-to-5x-SATA adapters (commonly paired with the JMS580 USB-to-SATA bridge), and industrial storage subsystems. Design consideration: because all cascaded drives share one 6Gb/s host link, sustained aggregate throughput per drive decreases with cascade depth - plan bandwidth budgets accordingly and verify drive spin-up stagger settings for power sequencing in multi-bay products. This page synthesizes distributor data, JMicron product documentation, and practical deployment notes (cascading, USB pairing) not found in the two-page product brief.
JMB582 - PCIe Gen3x1 to 2-Port SATA 6Gb/s Bridge | JMicron
The JMicron JMB582 is a PCIe Gen3 x1 to dual-port SATA 6Gb/s bridge controller that connects a PCI Express host to two SATA storage devices, provided in a 48-pin QFN (6x6 mm) surface-mount package. It integrates JMicron self-designed PCIe and SATA PHYs in a single chip and supports SATA Revision 3.2, AHCI, NCQ, TRIM, hot plug, and port multiplier operation. A PCIe-to-SATA bridge controller is an interface IC that translates between the PCI Express host bus protocol and the Serial ATA (SATA/AHCI) device protocol. In the storage-signal-chain hierarchy it sits between the host PCIe root port and SATA SSD/HDD endpoints, allowing motherboards, embedded x86 platforms, IPC, and servers to expand the number of SATA ports without changing the host chipset. Key features include a PCIe Gen3 x1 upstream port (compatible with PCIe 3.1a and backward compatible with PCIe 2.0/1.x), two independent SATA 6Gb/s host ports, support for both AHCI and legacy IDE programming interfaces, NCQ (Native Command Queuing), TRIM pass-through to SSDs, and PCIe link-layer power-saving modes for low idle power. The integrated PHYs eliminate external PHY chips, reducing BOM cost and board area. Architecturally, the JMB582 uses JMicron in-house PCI Express and SATA PHY macrocells with a packet-based protocol bridge. The upstream link nearly saturates the PCIe Gen3 x1 line bandwidth (approximately 985 MB/s usable), which is sufficient to drive two SATA 6Gb/s devices (up to about 550 MB/s each) in typical workloads. Port multiplier support allows additional drives per SATA port where required. Typical applications include M.2-to-SATA and PCIe-to-SATA add-in cards (such as the Seeed ODYSSEY-X86J4105 expansion and Waveshare dual M.2 SATA expander), NAS/home-server storage expansion, industrial PCs and consumer electronics requiring extra SATA connectivity. Design-wise, place the 3.3V input decoupling close to the QFN power pins, route the PCIe and SATA differential pairs with 100-ohm controlled impedance, and confirm the host BIOS exposes AHCI mode for TRIM support. This page adds value beyond the JMicron datasheet by synthesizing distributor availability, orderable variant cross-references (JMB582-QHCA0A, JMB582-QHCB0A), design notes, and application guidance in one place.
JMB585 - PCIe Gen3x2 to 5-Port SATA 6Gb/s Bridge | JMicron
The JMicron JMB585 is a PCIe Gen3 x2 to 5-port SATA 6Gb/s bridge controller in a QFN-76 package, providing five SATA III (AHCI) host ports with Port Multiplier support and near-line-rate PCIe Gen3 x2 bandwidth of up to 2 GB/s aggregate throughput. A bridge controller is a specialized interface IC that translates one bus protocol into another, sitting in the storage hierarchy between the host (PCIe root complex) and the storage device layer (SATA/AHCI drives). In a typical PC system, the JMB585 occupies the same role as a chipset-integrated SATA controller: it enumerates as a standard AHCI host, so operating systems treat its ports exactly like native motherboard SATA ports. Key features include five independent SATA 6Gb/s downstream ports, an upstream PCIe Gen3 x2 (about 2 GB/s) link, native AHCI and legacy IDE mode support, SSD TRIM command pass-through, and Port Multiplier support for expanding beyond five drives. JMicron emphasizes that the device almost fully saturates the PCIe Gen3 x2 line bandwidth, which matters when multiple SSDs are accessed concurrently. Technically, the JMB585 is highly integrated with JMicron self-designed PCI Express and SATA PHY IP on a single die, eliminating external PHY chips and reducing BOM cost and board area. Firmware operates transparently with in-box AHCI drivers in Linux, Windows, and most UEFI/BIOS implementations, which is why JMB585-based M.2 A+E and M.2 B+M adapter cards are popular in NAS and home-server builds. Typical applications include M.2-to-5xSATA expansion adapters for NAS servers (TrueNAS, Unraid), desktop storage upgrade cards, embedded x86 platforms such as the ODYSSEY-X86J4105, and industrial storage expansion where driverless AHCI compatibility is required. A key design consideration: the PCIe Gen3 x2 uplink (approx. 2 GB/s) is shared across all five SATA ports, so total concurrent bandwidth saturates at roughly two SATA SSDs running at full 6Gb/s speed; mechanical HDD workloads are never limited. This page synthesizes distributor availability, drop-in alternative analysis versus ASMedia ASM1166 and JMB582, and practical design notes not found in the manufacturer datasheet.
JMS580 - USB 3.1 Gen2 to SATA 6Gb/s Bridge | JMicron
The JMicron JMS580 is a USB 3.1 Gen 2 to SATA 6Gb/s bridge controller that connects a USB host to SATA storage devices such as HDDs and SSDs. Its USB 3.1 Gen 2 upstream interface delivers data rates up to 10Gbps, double the USB 3.1 Gen 1 rate, while the downstream SATA port is fully compliant with SATA 6Gb/s specifications. A bridge controller is a protocol-conversion IC that sits between two different bus standards, translating transaction-level commands so devices on either side can communicate transparently. Within the storage semiconductor hierarchy, the JMS580 belongs to the class of USB-to-SATA bridge ICs, which are themselves part of the broader peripheral controller and storage interface IC category used across external drives, docks, and adapters. Key features include native support for the USB Attached SCSI Protocol (UASP), which substantially elevates command throughput versus legacy Bot (Bulk-Only Transport), and TRIM command pass-through for SSDs, preserving long-term NAND write performance in external enclosures. The 10Gbps USB 3.1 Gen 2 link allows fast SATA SSDs to be nearly fully utilized at the interface level, and JMicron notes the single-chip solution saves cost, PCB board space, and development time for storage device developers. Architecturally, the JMS580 integrates USB 3.1 Gen 2 PHY and link layers, a SATA 6Gb/s controller, and protocol translation firmware handling SCSI/ATA command conversion, UASP queuing, and TRIM forwarding. JMicron's peripheral portfolio spans USB 3.1 Gen 2, Gen 1, USB 2.0, and FireWire, supporting single-bay, dual-bay, and multi-bay drive products, Blu-ray/DVD players, and NAS devices with RAID capabilities. Typical applications include external USB-C/USB 3.1 hard drive and SSD enclosures, USB-to-SATA adapter cables and dongles, docking stations, and multi-bay arrays where the JMS580 is paired with the JMB575 SATA port multiplier to connect up to five drives to a single USB host. A key design consideration is that real-world throughput is bounded by the slower of the USB link and the drive's SATA interface; HDDs rarely exceed 250 MB/s, so full 10Gbps benefit is only visible with SATA SSDs. Firmware for UASP and TRIM behavior should be validated against the host OS before production. This page synthesizes distributor data, verified JMicron datasheet content, drop-in alternative candidates, and practical design notes not found in the manufacturer datasheet alone.
KSZ8001S - 10/100 Ethernet PHY | Microchip | SSOP-48
The Microchip Technology KSZ8001S is a single-chip 10BASE-T, 100BASE-TX, and 100BASE-FX Ethernet physical-layer transceiver with MII, RMII, and SMII host interfaces, a 1.8 V core supply, and 3.3 V analog I/O in a 48-SSOP package. It combines three copper/fiber physical layers with LinkMD cable diagnostics and supports cable lengths up to 130 m on standard Ethernet cabling. An Ethernet physical-layer transceiver, or Ethernet PHY, is the circuit that converts digital Ethernet data into signals suitable for twisted-pair or fiber links and converts received signals back into digital data. In the networking hierarchy, the KSZ8001S sits between a Media Access Controller or Ethernet MAC and its physical medium. Its MII, Reduced MII, and Serial MII interfaces provide host-connection choices for embedded systems, industrial controllers, and networking equipment. Key verified features include 10BASE-T, 100BASE-TX, and 100BASE-FX support, operation from a 1.8 V core, compatibility with 3.3 V signaling, and the three listed host interfaces. The manufacturer literature describes approximately 250 mW power consumption, LinkMD cable-length determination to 200 m with stated accuracy of ±2 m, and robust operation over standard cables longer than 130 m. These characteristics make the device suitable where copper and fiber PHY support share one package. Technically, the transceiver integrates transmit and receive DSP functions needed for Manchester-coded 10 Mb/s Ethernet and MLT-3 100 Mb/s links. Full MII exposes parallel timing and data signals, RMII reduces pin count for higher-throughput controllers, and SMII provides a serial controller option. The serial management interface enables configuration, while LinkMD assists commissioning by estimating cable length and identifying wiring faults rather than requiring every fault to be diagnosed by a higher-level host. Typical uses include industrial Ethernet controllers, embedded gateways, test equipment, print servers, network switches, and optical-to-copper interface equipment. A copper-only design can select 10BASE-T or 100BASE-TX links, while 100BASE-FX support can extend the PHY into fiber-oriented designs. Fiber magnetics, optical signaling requirements, and system timing still need validation against the complete interface design. A key design consideration is that the KSZ8001S needs both its 1.8 V core rail and appropriate 3.3 V analog or digital supplies. Place required bypass capacitors at their pins, route high-speed and analog signals according to the reference layout, and isolate noisy switching nodes from PHY inputs. Check the complete pinout and operating limits in the official KSZ8001L/S datasheet before layout release. This page consolidates verified distributor information, manufacturer technical capabilities, sourcing context, and engineering guidance. It also distinguishes confirmed KSZ8001S facts from values that still require datasheet validation, avoiding unsupported package, pricing, temperature, or replacement claims.
KSZ8001SI - 10/100 Ethernet PHY, 48-SSOP | Microchip
The Microchip Technology KSZ8001SI is a single-chip 10BASE-T, 100BASE-TX, and 100BASE-FX Ethernet physical-layer transceiver with MII, RMII, and SMII host interfaces, supplied in a 48-BSSOP package. It supports 1.8 V CMOS operation, 3.3 V interface operation, 10 Mbit/s and 100 Mbit/s links, and cable diagnostics through LinkMD. An Ethernet PHY is an interface IC that translates between a digital Ethernet Media Independent Interface and analog signaling over twisted-pair or fiber media. In the network hierarchy, the KSZ8001SI sits between a network controller or embedded processor and an Ethernet transformer or optical interface. Its MII support permits a parallel host connection, RMII reduces the host-side pin and signal burden, and SMII provides a serial alternative. The verified device information identifies a 1.8 V CMOS design, 250 mW power consumption, operation over standard cables longer than 130 m, and support for MII, RMII, and SMII. LinkMD determines cable length and diagnoses faulty cables up to 200 m with stated accuracy of ±2 m. These capabilities make the device suitable for embedded Ethernet equipment, industrial controllers, network adapters, and test equipment. The KSZ8001SI supports copper and fiber link modes, including 10BASE-T, 100BASE-TX, and 100BASE-FX. Its 48-BSSOP package is intended for surface-mount PCB assembly, while the supplied search results identify tube packaging for one ordering configuration. The MII, RMII, and SMII interfaces give system designers flexibility in host bus selection and board partitioning. For copper links, the PHY requires appropriate external magnetics, termination, line-side filtering, and a compliant Ethernet transformer or coupling network. For 100BASE-FX, the external fiber interface must be designed for the selected optical device and link budget. The selected interface mode, clocking method, and host voltage must follow the manufacturer datasheet. A critical design consideration is that advertised protocol support does not eliminate the need for PCB-level Ethernet compliance testing. Differential routing, grounding, magnetics placement, isolation boundaries, and power filtering can determine whether a nominal PHY implementation achieves reliable 10BASE-T and 100BASE-TX operation. This page consolidates verified product facts, sourcing data, interface options, and engineering guidance for design evaluation.
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.
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.
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.
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.
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.
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.
KSZ8863FLL - 3-Port 10/100 Managed Ethernet Switch | Microchip Technology
The Microchip Technology KSZ8863FLL is a highly integrated three-port 10/100 managed Ethernet switch with integrated PHYs, one 100BASE-FX fiber port, one 10/100BASE-TX copper port, and one additional 10/100 port. It supports 10/100 Mbps Ethernet switching, MII connectivity, and CPU control through I2C or SPI. The device is packaged in a 48-LQFP package measuring 7 mm by 7 mm. According to the verified product description, the KSZ8863FLL is intended for low-port-count, cost-sensitive, and power-efficient 10/100 Mbps switch systems. An Ethernet switch is a networking semiconductor that connects multiple Ethernet endpoints and forwards frames between ports using integrated physical-layer transceivers, or PHYs. The managed-switch category adds configuration and control functions beyond basic frame forwarding, including port management, VLAN support, QoS priority handling, and CPU-controlled data interfaces. The KSZ8863FLL belongs to the switch-on-a-chip family, combining multiple Ethernet ports and management functions into one device rather than requiring separate discrete PHY and switch components. Key verified features include a three-port architecture, integrated PHYs, 100BASE-FX fiber support, 10/100BASE-TX copper networking, one MII interface, and CPU control and data interfaces. The product is identified by DigiKey as an Ethernet Switch with a 1.8 V, 2.5 V, or 3.3 V supply option and a 48-LQFP 7 x 7 mm package. Microchip describes the KSZ8863 family as supporting switch management, port and tag-based VLAN, QoS priority, and CPU control, which makes it suitable for compact embedded-network equipment. The KSZ8863FLL is positioned for industrial, communications, and embedded Ethernet designs that need copper and fiber connectivity in a small package. Its integrated approach can reduce board-level component count and simplify the network architecture compared with a discrete switch implementation. The MII interface allows connection to a host processor or another Ethernet-compatible controller, while I2C or SPI management access supports configuration from a microcontroller or embedded system. Designers should verify the exact pinout, transceiver requirements, clocking, magnetics, and fiber-interface implementation against the manufacturer datasheet before layout. Although the MLL, FLL, and RLL variants belong to the same KSZ8863 family, their supported interfaces and features differ, so substitution must be checked carefully. The verified data does not provide complete electrical limits, pin names, or pricing, and those values are marked as needed rather than estimated. This page combines the verified KSZ8863FLL product identity, package information, application positioning, and datasheet references with practical selection guidance. It also distinguishes direct family substitutions from broader Ethernet-switch alternatives that may require PCB, firmware, or interface changes.
KSZ8863MLL 3-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology KSZ8863MLL is a highly integrated 3-port 10/100 Mbps managed Ethernet switch with integrated PHYs, one MII interface, and CPU control, supplied in a 48-lead LQFP package. It is designed for compact, cost-sensitive, power-efficient 10/100BASE-T networks. The KSZ8863MLL combines two copper Ethernet PHYs supporting 10BASE-T and 100BASE-TX with a third port that can operate through the MII interface or bypass mode. An Ethernet switch IC is a network-interface device that connects multiple Ethernet nodes through integrated PHYs and internal switching logic. The KSZ8863MLL belongs to the Ethernet switch family, which sits within network interface semiconductors and broader embedded communication systems. Its managed-switch features include port- and tag-based VLAN support, QoS priority, link management, and CPU-controlled configuration through I2C or SPI. These capabilities make it suitable when a design needs more deterministic LAN behavior than an unmanaged switch provides. The MLL variant is intended for 2.5 V and 3.3 V systems and supports 10BASE-T and 100BASE-TX operation on two PHY ports. The third port includes an MII interface for connection to a host processor or another Ethernet controller. The supplied product information identifies the device as a 48-LQFP (7x7 mm) part with a 48-pin package and a 100 Mbps Ethernet switch classification. The KSZ8863MLL is useful in industrial embedded systems, compact controllers, factory equipment, and network appliances where three Ethernet paths are needed without implementing a full-size switching ASIC. Its small package and integrated PHYs reduce external PHY count and simplify board design. Configuration can be handled through the CPU interface, while VLAN and QoS features help organize traffic and improve network behavior. Designers should follow the manufacturer datasheet and hardware design checklist for pin assignments, reset timing, clock requirements, magnetic-component selection, and power sequencing. The reset input is active-low, and a hardware reset is required after power-up according to the KSZ8863MLL hardware design checklist. Board layout, magnetics isolation, impedance-controlled traces, and bypass-capacitor placement are critical because Ethernet interfaces are sensitive to return-path and signal-integrity issues. This page combines the verified manufacturer product information, distributor identification, package details, pricing reference, and practical design guidance for engineers evaluating the KSZ8863MLL. It is intended to help determine whether this 3-port Ethernet switch fits a specific embedded networking design before consulting the complete manufacturer documentation.