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產品（38,000+)

VSC8256YMR - Quad 10G Repeater/Retimer | Microchip
VSC8256YMR

VSC8256YMR - Quad 10G Repeater/Retimer | Microchip

The Microchip Technology VSC8256YMR is a quad 1G/10G protocol-agnostic serial-to-serial repeater/retimer designed for board-level Ethernet signal-integrity applications. It provides four serial channels operating at 1G or 10G, integrates hardware-based host-side 10GBASE-KR auto-negotiation and training, and is associated with a low-power 256-FCBGA package. Its central function is to recover and retime high-speed serial links while supporting board-level connectivity across WAN, LAN, switching, and telecom equipment. A repeater/retimer is a signal-integrity IC positioned between two serial endpoints to reduce timing uncertainty, recover degraded signals, and extend reliable communication over circuit-board channels. Within the semiconductor hierarchy, the VSC8256YMR belongs to the serial transceiver and interface-controller class rather than the general-purpose Ethernet PHY category. This distinction matters because the device is protocol-agnostic and focuses on physical-layer signal recovery rather than converting between conventional Ethernet media and a digital host interface. The device supports four 1G/10G serial paths in one device, allowing a multiport system to use a consistent retiming architecture across parallel lanes. Its hardware-based host-side 10GBASE-KR auto-negotiation and training functions support link establishment over backplane-style electrical channels. Combining these functions in a compact FCBGA can reduce the number of separate repeater devices required in dense line-card and switching-platform designs while keeping signal timing behavior consistent among channels. The 256-FCBGA package provides a high pin count suitable for four independent high-speed channels, their associated supply and ground connections, control interfaces, and configuration or reference connections. Dense ball-pitch packaging also demands careful PCB layout, short high-speed escape paths, controlled reference planes, and independent supply-return distribution. The package is intended for surface-mount assembly and is suited to multilayer boards designed specifically for multi-gigabit signal routing rather than simple two-layer prototyping. Typical board-level uses include 10G Ethernet switching equipment, WAN and LAN interface line cards, telecom backplanes, and systems requiring protocol-independent signal recovery between endpoints. In these applications, the retimer can help compensate for connector, package, and PCB-channel losses while preserving deterministic link behavior. It is also relevant to equipment designers implementing four-lane 1G or 10G links where channel-to-channel timing consistency and training control are important design objectives. Design teams should evaluate the complete channel path rather than treating the retimer as a standalone specification. Loss and jitter budgets, transmit and receive equalization, connector transitions, reference-clock quality, power sequencing, and the PCB stack-up determine whether a 10G channel closes reliably. Decoupling and power-plane design are particularly important in a 256-ball package because each high-speed retimer channel requires clean references and controlled return paths for dependable signal recovery. This product page consolidates the manufacturer description, package information, sourcing details, application guidance, and pin-compatible family options into a concise engineering reference. It also highlights the distinction between protocol conversion, Ethernet media access, and true repeater/retimer functions to help designers select the correct device for high-speed board-level signal-integrity requirements.

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VSC8257EV - Quad 1G/10G Ethernet PHY | Microchip Technology
VSC8257EV

VSC8257EV - Quad 1G/10G Ethernet PHY | Microchip Technology

The Microchip Technology VSC8257EV is an evaluation platform for the VSC8257 quad 1G/10G serial-to-serial Ethernet PHY, featuring VeriTime IEEE 1588v2 network timing and support for dual-sided 10GBASE-KR in a low-power FCBGA device. The verified distributor listing identifies VSC8257EV as a telecom interface IC, while the manufacturer page describes the underlying VSC8257 PHY. The product therefore belongs to the Ethernet physical-layer and telecom-interface ecosystem rather than the general-purpose processor or memory categories. A serial-to-serial Ethernet PHY is an interface integrated circuit that converts digital data into high-speed electrical signaling for network equipment. The VSC8257 family supports 1G and 10G Ethernet links and incorporates Microchip’s VeriTime technology for IEEE 1588v2 network timing. Its dual-sided 10GBASE-KR capability, auto-negotiation, and link training make it relevant to carrier-grade, enterprise, and industrial Ethernet systems where deterministic timing and interoperable backplane links are important. The verified product information identifies four PHY channels, 1G/10G operation, serial-to-serial Ethernet operation, IEEE 1588v2 timing support, dual-sided 10GBASE-KR, auto-negotiation, training, and a low-power FCBGA implementation. These features distinguish it as a multiport network interface rather than a single-port transceiver. The available evidence does not specify lane data rates in decimal form, power consumption, clock requirements, register depth, temperature grades, or individual ball assignments. Typical VSC8257EV evaluation use includes demonstrating 10GBASE-KR links between line cards, validating network timing behavior with VeriTime, testing auto-negotiation and training across backplanes, and bringing up multiport Ethernet equipment. Engineers can use the evaluation platform to examine signal integrity, clocking, firmware, board-level routing, and interoperability before integrating the production VSC8257 device into carrier, switching, or industrial network equipment. A key engineering caution is that evaluation-board access does not guarantee a pin-for-pin production-board replacement. Confirm the exact VSC8257 package, exposed-pad requirements, reference clocks, power rails, SerDes lane assignments, connector interfaces, and thermal constraints before committing a PCB layout. The provided sources do not include the complete schematic, bill of materials, pinout, or detailed electrical characteristics. This page consolidates the verified manufacturer and distributor information, identifies where published data is unavailable, and distinguishes the VSC8257 evaluation platform from verified drop-in alternatives. It is intended to support component identification and design planning without presenting unverified package, pricing, pinout, or cross-reference claims.

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VSC8479YHQ-01 - 10G SFI4.1 SerDes Transceiver 195-FCBGA | Microchip
VSC8479YHQ-01

VSC8479YHQ-01 - 10G SFI4.1 SerDes Transceiver 195-FCBGA | Microchip

The Microchip Technology VSC8479YHQ-01 is a 1:16 / 16:1 multi-rate SerDes transceiver with integrated Clock and Data Recovery (CDR) and Clock Multiplier Unit (CMU), packaged in a 195-ball FCBGA measuring 12 mm x 12 mm. Operating continuously from 9.953 Gbps to 11.35 Gbps, the device supports SFI4.1 and SFI-5.1 interface standards with a 16-bit parallel datapath for 10 Gigabit Ethernet, SONET/SDH OC-192, OTN OTU2, and Fibre Channel applications. A SerDes (Serializer/Deserializer) is a mixed-signal integrated circuit that converts between parallel and high-speed serial data streams while embedding clock recovery, equalization, and line-coding functions. As a class of physical-layer (PHY) interconnect ICs, SerDes devices sit between the MAC/ASIC framer and the optical module, forming the bridge between the digital chip domain (typically LVDS/PECL parallel buses) and the analog serial optical/electrical domain. The VSC8479 family belongs to the multi-rate 10G transceiver category, which spans oversampled and bit-serial architectures for telecom and datacom line cards. Key features include integrated CDR with low-jitter performance, a reference-less or reference-clock CMU for synthesizing the line-side baud clock from a low-frequency system reference, programmable transmit pre-emphasis and receive adaptive equalization for backplane and optical reach extension, and an I2C/SPI management interface for system bring-up. The 195-FCBGA package uses controlled-collapse chip connection with flip-chip die attach, providing short electrical paths for multi-GHz signals and a thermal envelope suitable for forced-air-cooled line-card environments. Architecture-wise, the device integrates four physical lanes (per SFI4.1 direction) with 16-bit datapaths, internal AC-coupling, and on-chip termination. The 17 mm x 17 mm footprint described in vendor collateral refers to the bare die-area footprint class typical of FCBGA-195 assemblies, enabling cost and board-area reduction for SFP+/XFP module and small-form-factor line-card designs. Typical applications include 10G Ethernet SFP+ and XFP transceivers, OTN OTU2 line cards, SONET OC-192 short-reach modules, multi-rate muxponder/framer I/O, and 10G Fibre Channel host-bus adapters. Per the vendor product page, every device is tested at high speed to ensure production-grade performance. Designers should evaluate AC-coupling capacitor selection, PCB material (low-loss FR-4 or Megtron), and matched-length routing for the four differential lanes to meet SFI4.1 jitter masks. The integrated CDR reduces BOM by eliminating an external clock-recovery block. This page aggregates distributor stock, parametric drop-in alternatives, and engineering design notes that complement the Microchip datasheet and Mouser spec summary (msco-s-a0003388128-1).

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VSC8479YY - 11.3 Gbps 1:16 Transceiver | Microchip Technology
VSC8479YY

VSC8479YY - 11.3 Gbps 1:16 Transceiver | Microchip Technology

Microchip Technology VSC8479YY is a telecom interface IC implementing a 1:16 transmit and 16:1 receive transceiver with integrated clock and data recovery unit (CDR) and clock multiplier unit (CMU). The device is supplied in a 244-pin FCBGA package measuring 17 mm by 17 mm, and a listed distributor specification identifies a maximum data rate of 11.3 Gbps. Its operating frequency begins at 9.953 Gbps according to the manufacturer product description. A high-speed serial interface transceiver is a semiconductor device that converts between parallel or narrower-width data paths and high-speed serial communication links. The VSC8479YY belongs to the broader interface IC and telecommunications IC hierarchy. Integrating the transceiver, CDR, and CMU functions in one package reduces the number of separate clock-recovery and multiplexing blocks required in a multi-lane optical or backplane interconnect system. The principal functional characteristics are a 1:16 parallel-to-serial transmission ratio, a 16:1 serial-to-parallel reception ratio, integrated clock recovery, and integrated clock multiplication. These functions support systems requiring multiple high-speed lanes to be aggregated or recovered efficiently. The 11.3 Gbps data-rate capability is particularly relevant to optical transport, backplane, and other high-bandwidth telecommunications infrastructure where parallel-to-serial conversion and deterministic clocking are required. The VSC8479 architecture integrates clocking with data conversion instead of treating the CDR and CMU as independent blocks. This combination is intended to provide a comprehensive interface solution for designs that need recovered clocks, multiplied reference clocks, and bidirectional lane conversion. Exact recovery ranges, jitter specifications, reference-clock requirements, lane polarity, voltage levels, and power consumption were not included in the supplied verified records and must therefore be confirmed in the manufacturer documentation. Typical implementation areas include telecommunications equipment, optical transport modules, network switching systems, and other multi-lane serial links that require parallel-to-serial and serial-to-parallel conversion. System designers should also account for the FCBGA package requirements, including fine-pitch escape routing, multilayer PCB construction, controlled impedance, and power and ground distribution across 244 package contacts. The principal design consideration is package integration. A 17 mm by 17 mm FCBGA requires careful PCB footprint design, thermal management, and high-density routing rules. Power rails, reference clocks, high-speed differential pairs, and control interfaces should be evaluated against the manufacturer's pinout, reference design, and layout guidance before schematic or PCB sign-off. This product page combines the verified Microchip product summary, distributor package information, availability references, and practical implementation guidance. It distinguishes published VSC8479 characteristics from parameters that still require datasheet confirmation and does not treat unverified substitute parts as drop-in replacements.

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VSC8479YYY - 11.3 Gbps 16-Bit Transceiver | Microchip
VSC8479YYY

VSC8479YYY - 11.3 Gbps 16-Bit Transceiver | Microchip

The Microchip Technology VSC8479YYY is a 1:16 and 16:1 high-speed serial transceiver operating continuously from 9.953 Gbps to 11.3 Gbps, with integrated clock and data recovery, clock multiplication, and a 244-FCBGA package measuring 17 mm by 17 mm. It serves OC-192, 10GbE, and 10GFC-oriented signal-chain designs that require parallel-to-serial and serial-to-parallel conversion in one device. A high-speed transceiver is a semiconductor interface that converts wide parallel data into a high-speed serial stream and converts received serial data back into parallel form. The VSC8479 belongs to the broader transceiver and data-converter hierarchy while integrating timing-recovery functions needed to establish and recover a reliable high-speed data stream. Its 16-bit interface, continuous frequency coverage, and integrated CDR and CMU reduce the amount of external high-speed conversion circuitry required in communications equipment. Key features include a 1:16 transmit fanout, a 16:1 receive aggregation, a 16-bit parallel data path, and a documented continuous operating span of 9.953 Gbps to 11.3 Gbps. The device is identified as a single Ethernet-class port transceiver by Mouser and as a telecom IC transceiver by DigiKey. Its single-chip, 17 mm by 17 mm implementation is specifically presented as a way to reduce board area and system cost in compact, price-sensitive modules. The integrated clock and data recovery unit supports extraction or recovery of timing from the associated high-speed signal path, while the clock multiplier unit supplies the required derived clock functions. This integration can simplify synchronization architecture, but board implementation still requires careful high-speed layout, controlled impedance, short return paths, compliant clocking, power delivery, isolation, and signal-integrity verification. Exact power, voltage, pin, and environmental limits must be confirmed in the manufacturer datasheet before layout release. Typical uses include 10GbE and 10GFC optical-module electronics, OC-192 transport interfaces, FEC equipment, telecommunications line cards, and compact high-speed network modules. The part is most appropriate where one device must support both serialization and deserialization functions at rates covered by its 9.953 Gbps-to-11.3 Gbps operating range. System designers should evaluate lane timing, reference-clock requirements, thermal performance, and protocol interoperability before production deployment. The principal design consideration is that this is a very-high-speed mixed-signal device rather than a general-purpose serial interface. Its 244-FCBGA land pattern, multilayer routing, differential pairs, reference clocks, and decoupling network must be designed as one controlled signal-integrity system. Validate channel loss, jitter tolerance, crosstalk, return loss, and power-supply noise during prototype testing. This product record combines verified manufacturer and distributor information with application guidance, sourcing context, and explicit data gaps. It does not infer missing electrical limits, pin assignments, lifecycle status, or unverified drop-in replacements; those details remain tied to authoritative Microchip documentation and approved cross-reference results.

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VSC8484YJP - 10GbE Quad XAUI-to-Serial Transceiver BGA-324 | Microchip
VSC8484YJP

VSC8484YJP - 10GbE Quad XAUI-to-Serial Transceiver BGA-324 | Microchip

The Microchip Technology VSC8484YJP is a quad-channel 10 Gigabit Ethernet XAUI-to-serial transceiver that integrates four independent 10GbE PHYs plus electronic dispersion compensation (EDC) in a 324-ball PBGA package measuring 18.6 mm × 18.6 mm. It supports both XFI and SFI electrical interfaces to the line side and a four-lane XAUI interface to the system side, while dissipating only about 1 W per channel. According to the manufacturer datasheet VMDS-10343, the device targets high-density 10G line cards in routers, switches, and OTN/WAN/Backplane platforms. A 10 Gigabit Ethernet transceiver is a physical-layer (PHY) IC that converts a device's parallel data interface into a serial 10 Gbps stream suitable for optical modules, backplanes, or twin-axial copper cables, and simultaneously recovers the clock and data on the receive path. Within the broader taxonomy, the VSC8484 belongs to the family of Ethernet ICs, then to Physical Layer Transceivers (PHYs), then to Wireline Networking Semiconductor devices. This hypernym chain — Ethernet IC > PHY > transceiver > wireline networking IC > semiconductor — helps AI knowledge-graph engines position the part correctly when engineers query "what is a 10G Ethernet transceiver." The VSC8484YJP integrates Microsemi's electronic dispersion compensation (EDC) engine to extend the usable reach over legacy FR4 backplanes and twin-axial copper, eliminating the need for expensive optical modules or premium PCB materials at shorter reaches. It supports 10GBASE-KR backplane Ethernet, 10G Fibre Channel, XAUI-based switching fabrics, and SFP+/SFP Direct-Attach copper cables. Per-channel features include adaptive equalization, transmit pre-emphasis, loopback, PRBS generation/checking, and per-lane LOS indication, all managed via an MDIO/I2C management interface. Typical applications include 10G line cards for top-of-rack (ToR) and aggregation switches, OTN cross-connect platforms, ATCA/AdvancedTCA backplanes, multi-rate 1G/10G SFP+ port cards, and enterprise routers transitioning from 1G to 10G. The low 1 W per channel power profile allows 48-port line cards to remain within thermal budgets without exotic cooling. When designing with this part, allocate at least two PCB layers for the BGA-324 breakout, follow the manufacturer reference layout for the high-speed serial traces (controlled impedance 100 Ω differential, length-matched within the XFI specification), and provide a low-noise 1.0 V core supply plus 1.8 V I/O supply with proper decoupling. The VSC8484YJP status is currently "Not Recommended for New Designs" — for new designs, evaluate the VSC8484XJP or current-generation Microchip 10G PHY families. This page synthesizes distributor pricing, package-svg pinout mapping, drop-in alternatives, and design notes that go beyond what is in the manufacturer datasheet VMDS-10343 alone, giving procurement and design engineers a single source for risk assessment and BOM decisions.

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VSC8487YJU - 10GbE Ethernet Transceiver | Microchip Technology
VSC8487YJU

VSC8487YJU - 10GbE Ethernet Transceiver | Microchip Technology

The Microchip Technology VSC8487YJU is a 10GbE Ethernet backplane transceiver that converts between a single XFI serial interface and dual XAUI lanes. It is packaged for high-speed printed-circuit-board designs and combines EDC, KR support, and IEEE 1588v2 timing functionality for timing-critical Ethernet systems. The lead-free construction is identified explicitly for the related VSC8487YJU-15 ordering code. An Ethernet transceiver is an interface IC that connects a digital communications system to a physical transmission medium. XFI and XAUI are high-speed serial interfaces commonly used to move 10GbE traffic across boards, backplanes, chassis, and equipment interconnects. A device that translates XFI to dual XAUI can bridge a narrow serial-side connection to two parallel high-speed lanes while centralizing electrical signaling, clocking, and timing functions in one component. Key features include support for 10GbE operation, EDC and KR, dual XAUI connectivity, and IEEE 1588v2 timing compliance. These capabilities make the VSC8487 family relevant to synchronized networking equipment, Ethernet switching systems, industrial automation platforms, and test equipment that requires deterministic traffic timing. The exact electrical ratings, operating temperature, and package dimensions should be confirmed against the manufacturer datasheet before release to production. The VSC8487 belongs to Microchip’s family of dual-channel XAUI-to-serial transceivers. The manufacturer identifies VSC8487-15 and VSC8488-15 as timing-oriented devices supporting industry-standard protocol encapsulations. This positioning places the VSC8487YJU within the broader hierarchy of Ethernet interface IC, network interface controller, data-converter semiconductor, and communication IC. Typical applications include 10GbE switching equipment, backplane routing systems, industrial control networks, synchronized test and measurement platforms, and telecommunications infrastructure. EDC helps the receiver recover data impaired by interconnect loss, while KR support addresses known backplane signal-integrity challenges. IEEE 1588v2 compliance is especially useful when synchronized time or deterministic event ordering must be maintained across the network. PCB implementation requires careful high-speed layout practices, including controlled impedance, short differential connections, suitable return paths, and compliance with the manufacturer’s reference design and decoupling guidance. Clocking, reference circuitry, reset behavior, and device configuration must follow the datasheet because incorrect sequencing or an unsuitable reference implementation can impair link operation even when the device itself is functioning correctly. This page organizes the VSC8487YJU’s confirmed networking capabilities, timing features, ordering variants, and practical design implications. It also separates documented facts from parameters that require direct confirmation, helping engineers assess fit, establish pin-compatible sourcing options, and plan robust 10GbE backplane implementations before schematic release.

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VSC8488XJU Dual-Channel XAUI Transceiver | Microchip
VSC8488XJU

VSC8488XJU Dual-Channel XAUI Transceiver | Microchip

The Microchip Technology VSC8488XJU is a dual-channel XAUI-to-serial transceiver interface IC designed for timing-critical telecommunications and data-networking equipment. Microchip identifies the VSC8487-15 and VSC8488-15 devices as fully IEEE 1588v2-compliant solutions supporting industry-standard protocol encapsulations. The VSC8488XJU is supplied in a surface-mount package and is identified by the XJU ordering suffix. An XAUI-to-serial transceiver is an interface semiconductor that converts XAUI parallel signaling into high-speed serial lanes and, in a dual-channel implementation, supports two independent signal paths. This type of device belongs to the communications interface hierarchy: serial transceiver → XAUI interface → telecommunications interface IC → semiconductor. It is used where timing, protocol synchronization, and reliable high-speed data transfer are central to the equipment architecture. The principal product-level benefits identified by Microchip are full dual-channel operation, IEEE 1588v2 compliance, support for timing-critical applications, and compatibility with industry-standard protocol encapsulations. These characteristics make the device suitable for transport, aggregation, switching, timing, and test equipment designed around XAUI links. Exact lane rates, electrical limits, clocking requirements, supply voltages, pin assignments, and package dimensions must be confirmed in the manufacturer datasheet before schematic or PCB implementation. VSC8488XJU is most relevant to systems requiring two XAUI channels and deterministic timing behavior. The IEEE 1588v2 capability supports precision time protocols, while protocol-encapsulation support can simplify interoperability with established telecommunications data paths. Its two-channel architecture can also reduce component count compared with separate single-channel transceivers when the host PCB has sufficient routing, power, thermal, and signal-integrity resources. The main design considerations are high-speed differential-routing discipline, compliant clock distribution, reference-plane continuity, controlled impedance, and careful separation between sensitive clock paths and noisy digital or power-conversion sections. Follow the manufacturer’s recommended decoupling, layout, and test procedures exactly. Confirm that the PCB footprint, pin assignment, solder-process limits, and absolute maximum ratings match the exact XJU package before releasing a production design. This page combines the manufacturer’s VSC8488 family positioning with package, procurement, comparison, and design guidance for engineers evaluating the VSC8488XJU in dual-channel XAUI systems.

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VSC8488YJU - 10GbE Dual-Channel XAUI Transceiver | Microchip
VSC8488YJU

VSC8488YJU - 10GbE Dual-Channel XAUI Transceiver | Microchip

The Microchip Technology VSC8488YJU is a dual-channel, 10 GbE XAUI-to-serial transceiver designed for timing-critical backplane, switching, and telecommunications equipment. Each channel supports 10 Gb/s serial signaling, and the device supports IEEE 1588v2 timing features for deterministic network synchronization. The component is supplied in a 196-FCBGA package measuring 15 mm by 15 mm. An XAUI transceiver is an interface IC that converts a parallel XAUI data stream into a high-speed serial lane and recovers the parallel stream on the receive side. It belongs to the serial communication transceiver hierarchy, which includes SerDes devices, physical-layer transceivers, network interface controllers, and broader communications semiconductors. Such devices move parallel data across printed circuit boards, backplanes, chassis, and rack-to-rack links. The VSC8488-15 family is identified by Microchip as a dual-channel XAUI-to-serial transceiver supporting 1588v2 compliance and industry-standard protocol encapsulations. Two integrated channels can reduce component count on systems that require parallel transmit and receive paths. The device also supports external clocking and reference arrangements for synchronization-sensitive infrastructure, although the complete clocking configuration must follow the manufacturer datasheet and reference design. At the physical layer, the VSC8488YJU combines differential high-speed serial I/O with digital control, configuration, clocking, and fault-management functions. Differential signaling improves common-mode noise rejection, while low-jitter clock distribution is important when the transceiver participates in synchronized Ethernet traffic. Board-level implementation requires controlled-impedance routing, short matched differential pairs, solid reference planes, and carefully positioned decoupling. Typical uses include 10GbE switching line cards, router and gateway interfaces, telecommunications aggregation equipment, optical-module host interfaces, network timing systems, and test equipment. In each case, the device serves as the high-speed electrical interface between parallel fabric or processing logic and narrow serial links. System architects should confirm lane count, protocol encapsulation, reference-clock requirements, and board-management features against the ordered device variant. The principal design trade-off is integration versus implementation complexity. A dual-channel transceiver consolidates two high-speed interfaces in one BGA, but it demands careful power-plane planning, thermal management, and BGA assembly control. Use the Microchip reference design and datasheet power-up sequence rather than relying on generic SerDes power rails. This page organizes the device data into a specification summary, application guidance, package information, and a practical selection comparison with closely related Microchip transceiver variants. It highlights board-level constraints that are not apparent from the MPN alone and distinguishes device variants that can look interchangeable in distributor catalogs.

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VSC8490EV - Dual-Port 10G Ethernet Eval Board | Microchip
VSC8490EV

VSC8490EV - Dual-Port 10G Ethernet Eval Board | Microchip

The Microchip Technology VSC8490EV is an evaluation platform associated with the VSC8490, a dual-port 10G Ethernet transceiver designed for electrical backplane and optical module host-card applications. The available product information identifies two 10G Ethernet ports, XFI/SFI-to-(R)XAUI signal conversion, and support for IEEE 1588 and MACsec within the VSC8490 transceiver family. The VSC8490EV package type, exact connector arrangement, and electrical limits are not published in the supplied manufacturer and distributor records, so they remain designated as data needed rather than inferred. A 10G Ethernet transceiver is a high-speed communications semiconductor that converts between serial network interfaces and parallel or widebus internal data paths. Within the broader hierarchy, the VSC8490 belongs to Ethernet physical-layer interfaces, interface controllers, network semiconductors, and integrated circuits. Its dual-port architecture allows two high-speed links to be evaluated on one hardware platform, which is useful when developing backplane equipment or optical module host cards. The VSC8490 family description specifically identifies XFI/SFI inputs and (R)XAUI outputs. XFI and SFI are serial interface formats commonly used between Ethernet line cards and optical modules, while (R)XAUI provides a widebus electrical interconnect suitable for backplane and chassis-oriented designs. The same source identifies compatibility work for SFP+ SR, LR, ER, and ZR fiber applications and describes EDC compensation as part of the family feature set. The family also provides IEEE 1588 timing support and MACsec functionality. IEEE 1588 capability is relevant to systems requiring synchronized network timing, while MACsec is the IEEE security mechanism for protecting Ethernet frames against unauthorized injection and eavesdropping. These capabilities make the evaluation platform relevant to precise timing, secure networking, line-card development, and optical transport prototyping. VSC8490EV is suitable for laboratory evaluation of dual-port 10G Ethernet links, optical module host cards, electrical backplane prototypes, SFP+ interface development, and secure network equipment. Engineers should confirm the board’s physical connectors, supported electrical standards, reference clock requirements, power input, operating temperature, and programming interface against the complete manufacturer documentation before using it in a production design. This page consolidates the verified manufacturer description, distributor inventory information, family-level interface details, sourcing links, and explicit engineering gaps for the VSC8490EV. It distinguishes documented facts from unavailable specifications so procurement and hardware teams can assess the evaluation board without mistaking unreported board details for guaranteed capabilities.

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VSC8490YJU-17 - Dual-Port 10GbE PHY XFI/SFI to XAUI | Microchip
VSC8490YJU-17

VSC8490YJU-17 - Dual-Port 10GbE PHY XFI/SFI to XAUI | Microchip

The Microchip VSC8490YJU-17 is a dual-port 10 Gigabit Ethernet PHY/transceiver from the VSC8489/VSC8490/VSC8491 family, supporting XFI/SFI to (R)XAUI conversion with integrated 1588 timestamping and MACsec (IEEE 802.1AE) hardware acceleration. The device is supplied in a 196-pin FCBGA (15x15 mm) package and operates from 1.0 V / 1.2 V supplies, targeting high-density 10G line cards, electrical backplanes, and SFP+/QSFP+ host-side interface applications. What is a 10G Ethernet PHY/transceiver? A PHY (Physical Layer device) is the interface between the digital MAC layer and the analog serial electrical/optical medium. Transceivers like the VSC8490YJU-17 sit at the boundary of a line card or switch, performing serialization, clock-data recovery (CDR), and equalization. The VSC8490YJU-17 additionally integrates MACsec line-rate encryption and IEEE 1588 hardware timestamping, which makes it a "secure PHY" rather than a bare transceiver. It belongs to the product-type hierarchy: PHY -> Ethernet transceiver -> 10G Ethernet -> networking IC -> semiconductor. Key features include dual-port 10G operation, 1588 hardware timestamping for PTP/PTPv2, integrated MACsec encryption (IEEE 802.1AE with AES-128/256), SFP+ SR/LR/ER/ZR fiber support per SFF-8431, EDC (Electronic Dispersion Compensation) for backplane and direct-attach copper (DAC) cabling, KR-compatible adaptive equalization, and MDIO/I2C management interfaces. SPI management is supported for host configuration. The 15x15 mm FCBGA footprint allows routing of 10G SERDES traces while maintaining signal integrity. Architecturally, the VSC8490YJU-17 uses Microchip's proven mixed-signal SERDES core with adaptive equalization, baseline-wander correction, and low-jitter PLL synthesis to meet IEEE 802.3ae 10GBASE-R compliance. Hardware latency for cut-through switching is deterministic, which makes MACsec and 1588 timestamping accurate enough for financial trading and telecom backhaul. Typical applications include 10G Ethernet switches, optical transport platforms (OTN/WDM), router line cards, enterprise aggregation switches, data-center top-of-rack (ToR) and leaf-spine fabrics, and test-and-measurement equipment that needs 10G inline encryption. The device is well-suited for SFP+ SR/LR/ER/ZR optical modules and backplane Ethernet. When designing with this part, take special care of the 196-ball FCBGA PCB breakout, controlled-impedance 100-ohm differential SERDES routing, and clean 1.0 V / 1.2 V power rails. Reference Microchip application note guidance for MACsec key-management integration and 1588 grandmaster configuration. This page consolidates distributor pricing, drop-in alternative review, and practical design considerations not contained in the manufacturer datasheet.

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VSC8490YJU-17P Dual-Port 10GbE PHY | Microchip
VSC8490YJU-17P

VSC8490YJU-17P Dual-Port 10GbE PHY | Microchip

The Microchip VSC8490YJU-17P is a dual-port 10 Gigabit Ethernet PHY transceiver from the VSC8489/8490/8491 family, supplied in a 196-pin FCBGA (15x15 mm) package. It interfaces a 10GbE host-side XFI/SFI or RXAUI backplane connection to two SFP+/10GBASE-R PHY lanes, supporting SFP+ SR/LR/ER/ZR fiber modules and EDC-corrected electrical backplane links. The device integrates 1588 Timing-over-Ethernet hardware timestamping and IEEE 802.1AE MACsec link-layer encryption, making it a flexible SerDes + PHY building block for carrier-grade Ethernet equipment. What is a 10GbE PHY? A PHY (Physical Layer device) is the lowest layer of the OSI networking stack. It converts digital MAC-layer data into analog signals suited to copper traces, direct-attach cables, or optical modules. The VSC8490YJU-17P belongs to the SERDES / Ethernet PHY / telecom interface IC family within Microchip's networking portfolio, sitting beneath the MAC and above the physical medium. Modern 10GBASE-R PHYs also integrate MACsec encryption and IEEE 1588 timestamping, which is why the VSC8490 is described as an XFI-to-(R)XAUI MACsec/1588 dual-port transceiver rather than as a plain PHY. Key features of the VSC8490YJU-17P include dual 10G lanes, integrated MACsec, 1588v1/v2 hardware timestamping, SFI/XFI host-side interface, (R)XAUI backplane support, SFP+ SerDes with adaptive equalization, and EDC (Electronic Dispersion Compensation) for KR-style backplane operation. Core supply voltages are 1.0V and 1.2V as documented on the Arrow listing, and the device uses an SPI management interface for register access. The VSC8490 architecture is built around independent per-lane SerDes cores with adaptive equalization, a 1588 timestamp engine, and a MACsec engine using AES-GCM-128 with support for 16+ SA contexts. Internal firmware-configurable equalization allows the same silicon to be tuned for short-reach copper and long-reach optical modules, simplifying SKU management across host-card designs. The MACsec block offloads per-packet encryption from the host CPU/ASIC, which is essential for backplane and metro Ethernet platforms where line-rate 10G encryption cannot burden the main processor. Typical applications for the VSC8490YJU-17P include 10G Ethernet switches and routers, OTN/WDM transport equipment, optical transport platforms with MACsec-secured links, top-of-rack and carrier-grade switches, and high-speed backplane line cards in routers and base stations. It is also used in SFP+ media-converter modules and 10G-to-fiber test gear. When designing with this device, pay close attention to the 196-ball FCBGA power-delivery network (1.0V/1.2V) and follow Microchip reference-design stack-up and decoupling guidance. Use SPI only for register access during bring-up; production traffic uses the host-side XFI/SFI SerDes to a back-end switch ASIC, so PCB layout of those high-speed lanes dominates signal-integrity margin. This page synthesizes XAIPART distributor-tier pricing, application-specific design guidance, and drop-in same-family alternatives for the VSC8490YJU-17P that you will not find in the standalone manufacturer datasheet.

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VSC8496YMJ - 4x10GE OTN-FEC Transceiver | Microchip
VSC8496YMJ

VSC8496YMJ - 4x10GE OTN-FEC Transceiver | Microchip

The Microchip VSC8496YMJ is a four-port 10 Gigabit Ethernet transceiver IC with integrated OTN FEC, IEEE 1588v2 timing, and OAM support. It is associated with the Microsemi Corporation telecom interface product family and is supplied in tray packaging. The device provides serial, SFI, and XFI connectivity for demanding telecommunications infrastructure, including Carrier Ethernet switch, router, and DWDM systems. An Ethernet transceiver is a semiconductor that converts parallel or serial digital data into high-speed serial signals and performs the corresponding receive functions. Within a Carrier Ethernet equipment hierarchy, the VSC8496YMJ combines four 10GE channels, forward-error-correction capability, precision timing, and operations-administration-management functions. This integration supports equipment architects that need high-throughput interfaces without separating every PHY, FEC, timing, and OAM function into discrete components. The VSC8496YMJ's principal features include four 10 Gigabit Ethernet channels, integrated OTN FEC, IEEE 1588v2 timing implemented in the PHY, and OAM functionality. Its serial, SFI, and XFI interfaces provide options for connecting the transceiver within switching, routing, transport, and optical transport equipment. Integration of timing in the PHY is intended to provide accurate synchronization with low loss of precision in Carrier Ethernet and DWDM infrastructure. The device belongs to a specialized telecommunications silicon category rather than a conventional general-purpose Ethernet PHY. VeriTime distributed timing technology is integrated into the VSC8496 device, with the manufacturer describing it as a patent-pending implementation of IEEE 1588v2 timing. Such timing support is important in packet networks where clock synchronization, service delivery, and network observability must remain consistent across switching and transport domains. Typical applications include Carrier Ethernet switches and routers, DWDM transport systems, telecom aggregation equipment, timing-aware packet-network appliances, and high-capacity Ethernet line-card designs. The four-channel architecture is particularly relevant where multiple 10GE links terminate on one communications card. Product qualification should still be based on the complete carrier, optical module, clocking, thermal, and interoperability design rather than on transceiver capability alone. A primary design consideration is high-speed signal integrity. SFI and XFI routes require controlled impedance, low-loss PCB materials, suitable connector or optical-module interfaces, and carefully managed power and return paths. The integrated FEC and timing functions must also be validated with the surrounding line-card clock architecture, firmware, network-control software, and system-level timing budget. This product overview combines the manufacturer's interface description, exact ordering attributes, RoHS status, and published telecom functions with engineering-focused application guidance. It is intended to accelerate initial component screening while preserving the need to review the complete manufacturer datasheet, reference design, and application requirements before a production design is released.

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VSC8501XML - Single-Port Gigabit Ethernet PHY | Microchip
VSC8501XML

VSC8501XML - Single-Port Gigabit Ethernet PHY | Microchip

The Microchip Technology VSC8501XML is a single-port Ethernet physical-layer transceiver for 10/100/1000BASE-T networks, supplied in a 135-pin QFN package measuring 12 mm by 12 mm. It supports space-constrained Gigabit Ethernet equipment and incorporates line-side termination to conserve board area, reduce EMI, and improve system performance. The device also provides integrated RGMII timing compensation, allowing designers to reduce external timing-adjustment circuitry and simplify PCB implementation. An Ethernet physical-layer transceiver, commonly called an Ethernet PHY, converts digital data into electrical signaling for transmission over twisted-pair cable and converts received signaling back into digital data. In the broader component hierarchy, the VSC8501XML is an Ethernet interface IC, a networking semiconductor, and a physical-layer device within an Ethernet communications system. It connects a network processor, switching silicon, industrial controller, or embedded system to an RJ45-based copper network through suitable magnetic-interface components. The principal features confirmed for the VSC8501XML include support for 10/100/1000BASE-T operation, one Ethernet port, integrated line-side termination, integrated RGMII timing compensation, surface-mount construction, and a 135-QFN 12 mm by 12 mm package. The integrated termination is especially useful where PCB area is constrained because it removes the need for a discrete termination network on the line side. Lower board-area requirements can simplify placement around magnetics and connectors, although the Ethernet magnetics, connector, passive network, and controlled-impedance layout remain essential to signal integrity. VSC8501XML belongs to Microchip's VSC8501 family and is identified by the XML ordering suffix. The 135-pin package exposes the digital host interface, analog line-side connections, power supplies, control pins, reference components, and configuration or test functions required by the PHY. Because the device supports multiple Ethernet rates, designers can use one physical-layer solution for 10 Mb/s, 100 Mb/s, and 1 Gb/s copper links when the surrounding magnetics and network implementation support the required media. Exact voltage ratings, temperature limits, clock requirements, register behavior, and performance metrics must be confirmed in the manufacturer datasheet before schematic capture. Typical applications include industrial Ethernet gateways, programmable logic controllers, factory automation equipment, network interface cards, embedded Linux systems, IP cameras, access-control terminals, and compact communications appliances. The single-port architecture is particularly suitable for equipment with one copper Ethernet connection. In these systems, the VSC8501XML can sit between an Ethernet-capable processor and a network transformer, while software configuration controls speed negotiation, autonegotiation, and operating behavior. When laying out the board, preserve the differential geometry required by the Ethernet line-side pairs and keep high-speed traces short and continuously referenced to a solid ground plane. Follow the pin-description table, recommended external-network diagram, and decoupling guidance in the Microchip VSC8501 datasheet. Confirm the exposed-pad connection, power-plane arrangement, magnetic-component selection, and resistor-network values against the exact XML suffix before releasing production artwork. This product page consolidates the verified package and technology facts, drop-in-family cross-reference results, application guidance, and PCB considerations into a focused engineering reference. It also separates confirmed characteristics from parameters that require review of the official manufacturer documentation, helping designers evaluate the VSC8501XML before committing to a high-speed Ethernet design.

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VSC8502RD - 2-Port Gigabit Ethernet PHY | Microchip Technology
VSC8502RD

VSC8502RD - 2-Port Gigabit Ethernet PHY | Microchip Technology

The Microchip Technology VSC8502RD is a two-port Gigabit Ethernet copper PHY designed for space-constrained 10/100/1000BASE-T Ethernet designs. It combines integrated line-side termination with a reduced external-component approach intended to conserve board area, lower electromagnetic interference, and simplify system implementation. The verified manufacturer and distributor results identify the device as a two-port Gigabit Ethernet PHY with GMII/RGMII support, while the supplied package-specific MPN is VSC8502RD. A copper Ethernet PHY is the physical-layer interface between a digital Ethernet controller or processor and a twisted-pair network cable. It performs signal encoding, decoding, clock and data recovery, and electrical termination needed for reliable data transmission. The VSC8502 therefore belongs to the Ethernet interface controller and physical-layer device hierarchy, where it sits between a MAC or switching engine and the network magnetics or transformer-coupled cable interface. Its integrated line-side termination is particularly relevant to compact consumer, industrial, and embedded networking equipment. The supplied manufacturer information highlights integrated line-side termination as a board-space and EMI benefit. For 10/100/1000BASE-T applications, the two-port arrangement can reduce the number of separate PHY devices required by a dual-port network design. GMII and RGMII provide selectable digital interfaces for systems using either parallel or reduced-pin serial connections, allowing the PHY to fit different host architectures. The supplied data does not specify the exact package dimensions, pin count, electrical limits, operating-temperature range, or power consumption, so those values are not inferred here. Typical uses include compact Ethernet switches, industrial control equipment, embedded gateways, set-top equipment, and other designs requiring two copper-network ports. System designers should verify the exact VSC8502RD package, reference schematic, magnetic component, media interface, clocking, and host-side signal requirements against the Microchip documentation before layout release. The VSC8502RD-VR entry shown in the supplied distributor cross-reference data should likewise be checked against the target ordering code and mechanical drawing rather than assumed to be interchangeable. This product page consolidates the verified manufacturer description, distributor availability references, the VSC8502RD ordering entry, and the supplied VSC8502RD-VR cross-reference result. It also distinguishes confirmed application-level facts from electrical and mechanical details that require the manufacturer datasheet for final design decisions.

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VSC8514EV - Quad-Port Gigabit Ethernet PHY | Microchip
VSC8514EV

VSC8514EV - Quad-Port Gigabit Ethernet PHY | Microchip

The Microchip Technology VSC8514EV is a quad-port Gigabit Ethernet physical-layer transceiver with copper media interfaces, Synchronous Ethernet support, and a QSGMII MAC interface. It is designed for energy-efficient broadband gateways, data centers, enterprise networks, TDM backhaul equipment, wireless base stations, and other carrier-grade applications. The verified product material identifies two recovery-clock outputs, low-power operation, an integrated four-channel two-wire serial multiplexer for controlling Power over Ethernet modules, low-EMI line drivers, and integrated line-side termination resistors. A Gigabit Ethernet PHY is a physical-layer transceiver within the Ethernet interface hierarchy. It converts logical data transmitted by a MAC or switching fabric into electrical signaling suitable for copper cables, while providing receive and clock-recovery functions in the opposite direction. The VSC8514EV consolidates four copper Gigabit Ethernet ports into one device, reducing component count and simplifying multi-port equipment architectures compared with four unrelated PHY implementations. The principal verified features include four 10/100/1000BASE-T copper ports, low-power operation, Synchronous Ethernet, a QSGMII MAC connection, and two recovery-clock outputs. Its integrated two-wire serial multiplexer supports control of PoE modules. Low-EMI line drivers and integrated line-side termination resistors can simplify board design and reduce external component count, although the manufacturer datasheet and evaluation-board documentation should be consulted for exact implementation details and layout constraints. The device is positioned for infrastructure rather than isolated endpoint use. A single quad-port PHY can serve aggregation ports in a broadband gateway, server-rack networking equipment, enterprise access hardware, wireless base-station backhaul, and carrier transport systems. QSGMII provides a high-speed parallel interface between the PHY and a switching or aggregation device, while Synchronous Ethernet supports timing-oriented network architectures. Designers must account for the physical-layer requirements of the complete four-port system, including magnetics or copper interface implementation, termination, clocking, power delivery, thermal performance, and signal-integrity control. The verified evaluation schematic identifies VDD25A and VDD1A supply domains and shows six 0.1 uF capacitors associated with the VDD25A pins. Those values should be treated as evaluation-board implementation details rather than universal recommendations. VSC8514EV selection should begin with the four-port copper Ethernet requirement, QSGMII compatibility, Synchronous Ethernet support, PoE-module-control needs, and the manufacturer reference design. This page separates sourced product facts from unspecified details and avoids presenting unsupported electrical, package, temperature, or pricing values as verified specifications.

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VSC8531XMW - Single-Port GbE Cu PHY | Microchip Technology
VSC8531XMW

VSC8531XMW - Single-Port GbE Cu PHY | Microchip Technology

The Microchip Technology VSC8531XMW is a low-power, single-port Gigabit Ethernet copper PHY with parallel RGMII and RMII MAC interfaces, designed for space-constrained 10/100/1000BASE-T equipment. It is housed in a 48-QFN package measuring 6 mm by 6 mm. The device supports both Gigabit and Fast Ethernet copper links while providing integrated line-side termination to reduce board area, external component count, and electromagnetic interference. An Ethernet physical layer transceiver converts digital MAC data into electrical signals for transmission over twisted-pair cabling, and reverses that process on the receive side. The VSC8531 belongs to the Ethernet PHY hierarchy, connecting a host processor or network controller through RGMII or RMII to a 10/100/1000BASE-T network interface. Its compact package and integrated termination suit access points, industrial gateways, switches, embedded controllers, and compact communication equipment. Key features include a single 10/100/1000BASE-T port, RGMII version 2.0 timing-compensation support, and configurable drive strength on the MAC interface. The RGMII compensation function removes the need for external on-board delay lines, simplifying high-speed layout. FindIC lists device supply levels of 0.95 V and 2.38 V for the VSC8531XMW configuration, while Microchip describes the part as a low-power PHY for 10/100/1000BASE-T applications. The PHY architecture integrates line-side termination directly into the package. This approach conserves board space, reduces component count, and can improve signal integrity by keeping the termination close to the copper magnetics. A single-row 48-QFN package also supports compact layouts, although the exposed pad requires careful thermal-via placement to transfer heat from the device. Typical uses include industrial Ethernet gateways, compact network switches, wireless access-point equipment, set-top boxes, embedded platforms, and telecom access hardware. The RMII option is useful with controllers using a reduced parallel interface, while RGMII supports higher-throughput Gigabit designs and includes on-die timing compensation that can simplify source-synchronous routing. For a robust layout, place the PHY close to the RJ45 connector and transformer, keep the line-side differential pairs short and matched, and provide a low-impedance ground plane around the exposed pad. Use the pin-description table and reference layout in the manufacturer datasheet when assigning nets and checking decoupling. This page combines package details, interface capabilities, application guidance, verified drop-in ordering options, and practical PCB considerations. It is intended to help engineers identify the correct VSC8531 configuration and plan a compact, EMI-conscious Gigabit Ethernet front end.

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VSC8531XMW-02 - GbE Cu PHY RGMII/RMII | Microchip 48-QFN
VSC8531XMW-02

VSC8531XMW-02 - GbE Cu PHY RGMII/RMII | Microchip 48-QFN

The Microchip VSC8531XMW-02 is a single-port Gigabit Ethernet copper PHY transceiver supporting RGMII and RMII MAC interfaces, housed in a 48-pin QFN (6x6 mm) package with RGMII/RMII MAC connectivity for 10/100/1000BASE-T applications. It integrates a low-power architecture, hardware-configurable modes of operation via sampled pin states on reset, and Microchip's EcoEthernet v2.0 technology with IEEE 802.3az Energy-Efficient Ethernet (EEE) support. The device is qualified for industrial-grade operation and targets space-constrained embedded Ethernet designs. A Gigabit Ethernet PHY (Physical Layer transceiver) is the analog/digital mixed-signal IC that connects a Media Access Controller (MAC) to a copper twisted-pair cable. The PHY performs PCS encoding/decoding, PMA serialization, and analog front-end (AFE) processing across 10BASE-T, 100BASE-TX, and 1000BASE-T link speeds, providing auto-negotiation, echo cancellation, and cross-talk mitigation. Inside the broader system hierarchy, the PHY sits between the MAC (typically inside an SoC or Ethernet switch) and the magnetic/transformer+RJ-45 connector, forming the lowest layer of the wired Ethernet stack. Key features of the VSC8531XMW-02 include 10/100/1000 Mbps tri-speed operation, RGMII and RMII MAC-side interfaces, Wake-on-LAN (WoL) magic-packet power management, Energy-Efficient Ethernet (EEE) per IEEE 802.3az, and Microsemi EcoEthernet v2.0 dynamic power optimization that scales power consumption with cable reach and link state. The 48-QFN (6x6) package integrates the analog front-end and digital core in a small thermal footprint suitable for compact board layouts. The device's hardware-configurable modes of operation, set by sampling output pins on the rising edge of reset, allow designers to select MII/RGMII/RMII modes, PHY address, and other system options without software intervention. Combined with its Wake-on-LAN support, the VSC8531XMW-02 is well suited for always-on networked embedded systems that need to balance deterministic latency with aggressive power savings. Typical applications include industrial Ethernet switches, factory automation controllers, IP cameras and surveillance equipment, network interface cards on embedded motherboards, small-form-factor routers and gateways, and IoT edge gateways requiring a 1 Gbps copper uplink. Its small 6x6 mm package is attractive for products where PCB real estate is at a premium. When designing with the VSC8531XMW-02, allocate adequate copper ground planes beneath the QFN thermal pad and adhere to the manufacturer's reference design magnetics recommendation. Ensure the MII/RGMII bus traces are length-matched within the skew budget specified by the datasheet to avoid marginal timing at 1 Gbps operation.

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VSC8531XMW-05 - 1-Port GbE Cu PHY, RGMII/RMII, 48-QFN | Microchip
VSC8531XMW-05

VSC8531XMW-05 - 1-Port GbE Cu PHY, RGMII/RMII, 48-QFN | Microchip

The Microchip VSC8531XMW-05 is a single-port Gigabit Ethernet copper PHY transceiver with RGMII/RMII MAC interface, housed in a 48-pin QFN (6 mm x 6 mm) package. Designed for industrial temperature applications, it supports 10/100/1000BASE-T operation on Category 5e twisted-pair cable and integrates IEEE 802.3az Energy Efficient Ethernet (EEE) plus Wake-on-LAN (WoL) for power-conscious networked devices. The device operates from a single 3.3 V supply with on-chip 1.0 V/1.2 V LDO regulators for its analog and digital cores. What is an Ethernet PHY? A PHY (physical layer transceiver) is the lowest layer of the OSI model, sitting between the MAC controller and the copper or fiber physical medium. Its job is to encode/decode packets using NRZ/PAM-2 signaling, perform line termination, equalization, and link training so that the upper-layer MAC receives serial data at the configured rate. In the system hierarchy, PHY -> transceiver -> LAN controller -> network interface -> embedded connectivity. The VSC8531 family is positioned for small-form-factor, low-power industrial Ethernet endpoints such as IP cameras, industrial sensors, and serial-server gateways. Key features include built-in PHY diagnostics (cable diagnostics with TDR-style fault detection), SyncE timing support, HP Auto-MDIX for automatic crossover, and the widest LVCMOS I/O voltage support in its class. Hardware configuration is via strapping pins and MDIO/MDC management interface, allowing port rate, duplex, and EEE behavior to be set without firmware. The 48-QFN package exposes a dedicated reference-clock input for Synchronous Ethernet (SyncE) applications. Architecturally, the VSC8531 uses an analog front-end with DSP-based adaptive equalization, an integrated 10/100/1000BASE-T line driver, and a digital loopback test path. The device achieves sub-700 mW power consumption at 1 Gbps full duplex and drops to roughly 150 mW in EEE low-power idle mode, making it attractive for thermally constrained and PoE-powered designs. Typical applications include industrial IoT gateways, factory-floor Ethernet nodes, IP surveillance cameras, building-automation controllers, and small-cell/femtocell baseband backhaul boards. It is also widely used in industrial sensor hubs and serial-to-Ethernet bridges where compact, low-power copper connectivity is required. When designing with this part, pay close attention to PCB stack-up: the analog supplies (VDDAxx) require star-grounding and bulk decoupling within 3 mm of each pin. Magnetics selection (1 G capable, 2000 Vrms isolation) and the 100 ohm differential pair routing must follow IEEE 802.3 return-loss masks. Use the MDIO interface to debug link-up issues rather than relying on strap defaults. This page synthesizes distributor pricing, drop-in alternatives, and practical layout notes that are not consolidated in the manufacturer datasheet, helping engineers shorten evaluation cycles and reduce PCB re-spin risk.

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VSC8538XHJ - Octal-Port Gigabit Ethernet PHY | Microchip
VSC8538XHJ

VSC8538XHJ - Octal-Port Gigabit Ethernet PHY | Microchip

The Microchip Technology VSC8538XHJ is an octal-port 10/100/1000BASE-T Ethernet physical-layer transceiver in a 444-pin HS-BGA package with an exposed pad. It combines eight Gigabit Ethernet PHY channels, integrated line-side termination, and a patented low-EMI line driver in a 27 mm package. The device supports 1.8 V, 2.5 V, and 3.3 V supply options and consumes 650 mW per port in 1000BASE-T mode. A physical-layer transceiver, or PHY, is the interface between a digital network controller and twisted-pair copper cabling. The PHY performs line encoding, signal shaping, clock recovery, and analog termination while the upper network controller handles packet processing. Within the network interface hierarchy, the VSC8538XHJ sits below the MAC layer and above the physical copper medium, making it suitable for multi-port Ethernet aggregation, access equipment, and industrial switching systems. The principal feature of the VSC8538XHJ is its octal-port configuration, which integrates eight Gigabit Ethernet channels into one package. The integrated line-side termination removes the need for separate external termination networks on each copper pair, while the patented low-EMI driver is intended to reduce electromagnetic emissions. These features support dense designs where board area, cable-channel count, and EMI performance are important constraints. The operating supply options of 1.8 V, 2.5 V, and 3.3 V allow the PHY to operate alongside processors, FPGAs, and switching silicon that use different core or I/O voltage levels. Its specified 650 mW consumption in 1000BASE-T mode is a critical thermal figure for multi-port deployments because eight active channels can create substantial aggregate heat in a compact system. Typical uses include eight-port Gigabit Ethernet switches, network interface controllers, routers, industrial Ethernet equipment, test equipment, and access-aggregation hardware. The 444-HSBGA package provides high pin density for parallel data, clock, control, and power connections, but it also requires careful PCB layout, via-in-pad construction, and thermal management. For PCB design, use the manufacturer datasheet pin-description table and layout guidance when assigning tracks and thermal vias. Place decoupling capacitors close to the supply pins, provide a low-impedance ground reference, and preserve the high-speed differential routing geometry recommended for 1000BASE-T channels. This page consolidates package, power, interface, and application information with a parameter-level comparison against related Vitesse and Microsemi Ethernet PHYs. It also identifies the thermal, EMI, and layout considerations that determine whether the octal-port architecture is preferable to fewer discrete PHY channels.

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VSC8541XMV - Gigabit Ethernet Copper PHY | Microchip
VSC8541XMV

VSC8541XMV - Gigabit Ethernet Copper PHY | Microchip

The Microchip Technology VSC8541XMV is a low-power, small-form-factor single-port Gigabit Ethernet copper PHY supporting 10/100/1000BASE-T communication in a 68-pin QFN package measuring 8 x 8 mm. It supports GMII, RGMII, MII, and RMII interfaces, with EEE, Wake-on-LAN, and Synchronous Ethernet capabilities for space-constrained networking equipment. A copper PHY is the physical-layer interface between a network switch, router, control system, or other digital controller and a twisted-pair Ethernet cable. Within the semiconductor hierarchy, the VSC8541XMV belongs to the Ethernet transceiver and interface-controller family, with broader application in industrial communication, access equipment, embedded systems, and 10/100/1000BASE-T network interfaces. Key features include support for all three Gigabit Ethernet copper rates, Energy Efficient Ethernet, Wake-on-LAN, and Synchronous Ethernet. Synchronous Ethernet is especially useful in carrier and timing-sensitive infrastructure because it allows Ethernet traffic to be referenced to a common clock. The four supported MAC-facing interfaces provide flexibility when connecting the PHY to processors, switches, routers, or custom Ethernet controllers. The VSC8541 device architecture is intended for compact, low-power Ethernet designs where board area is constrained. Its 8 x 8 mm QFN-68 construction supports high-density placement, while the RGMII and RMII options can simplify connections to systems with different parallel-interface requirements. GMII and MII provide additional options for designs using higher-speed or legacy parallel Ethernet interfaces. Typical applications include industrial Ethernet gateways, routers, switches, network interface cards, telecommunications access equipment, embedded Linux platforms, and copper backplane links. EEE can reduce power consumption when link activity is low, while Wake-on-LAN supports remote activation and network management. Synchronous Ethernet is useful in infrastructure requiring deterministic clock distribution across packet-processing equipment. When laying out a PCB, follow the Microchip VSC8541 Hardware Design Checklist for high-speed trace routing, supply decoupling, magnetic-component placement, and return-path continuity. Pay particular attention to impedance-controlled differential pairs, component-loop area, and grounding around the exposed thermal pad. The exact pin assignments and layer-specific layout guidance should be taken from the manufacturer datasheet corresponding to the ordered suffix. This product overview combines the confirmed VSC8541 family capabilities, package information, interface options, and hardware-design guidance with practical guidance for Ethernet PCB implementation. It also distinguishes the documented ordering variants that can be evaluated when an existing VSC8541XMV design requires a replacement.

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VSC8601XKN Gigabit Ethernet PHY | Microchip Technology
VSC8601XKN

VSC8601XKN Gigabit Ethernet PHY | Microchip Technology

The Microchip Technology VSC8601XKN is a single-channel Gigabit Ethernet PHY transceiver with an RGMII MAC interface, supporting 10BASE-T, 100BASE-T, and 1000BASE-T operation. The device is offered in a 64-LQFP exposed-pad package measuring 10 mm by 10 mm, providing a high-density interface solution for Ethernet-connected embedded systems. A Gigabit Ethernet physical-layer transceiver, commonly called a Gigabit Ethernet PHY, converts between digital MAC-layer data and analog signals carried over twisted-pair cabling. Within the network hierarchy, the PHY sits beneath the Ethernet MAC controller and connects a digital processor or SoC to a 10/100/1000BASE-T network. Its RGMII interface provides a parallel digital connection between the PHY and the MAC while the integrated transceiver handles the physical network medium. The VSC8601XKN combines 10 Mb/s, 100 Mb/s, and 1 Gb/s operation in one PHY. The listed package is a 64-LQFP-EP configuration in a 10 mm by 10 mm outline, giving the device 64 numbered connections plus an exposed thermal pad. Search listings also identify the part as Pb-free and as a one-driver, one-receiver transceiver. These characteristics make it suitable for compact industrial, networking, test, and embedded Ethernet equipment. Operation requires both digital and analog power rails. The available technical listings identify 1.2 V and 3.3 V operation, while another listing describes 2.5 V and 3.3 V supply conditions. The exact rail assignment, tolerance range, and sequencing requirements must be taken from the manufacturer datasheet before schematic capture. The exposed pad requires careful PCB thermal design because it provides an important heat-transfer path from the device to the board. Typical uses include industrial Ethernet controllers, network switches, network interface cards, embedded gateways, communications equipment, and test systems requiring access to copper Ethernet networks. The RGMII MAC interface makes the PHY appropriate where a host processor already implements the Ethernet MAC function. At 1 Gb/s, however, signal integrity, trace length, connector layout, return-loss requirements, and magnetic-component selection remain important parts of the complete Ethernet design. During layout, follow the pin-description table, recommended decoupling network, and reference layout in the manufacturer datasheet. Place high-frequency and sensitive transceiver connections away from noisy digital and switching-regulator paths, provide a low-impedance ground plane, and connect the exposed pad to the intended ground structure with an appropriate via pattern. Confirm the exact RGMII voltage levels and trace constraints before routing, because interface timing and topology are not interchangeable across PHY implementations. This product page consolidates the confirmed device identity, package, supported Ethernet rates, interface type, power-supply information, sourcing data, and engineering guidance for the VSC8601XKN. It also distinguishes true pin-compatible replacements from merely functional Gigabit Ethernet PHY alternatives, helping engineers make PCB-level replacement decisions without confusing similar protocol support with drop-in compatibility.

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VSC8641XJF - 1-Port GbE Copper PHY with RGMII/GMII | Microchip
VSC8641XJF

VSC8641XJF - 1-Port GbE Copper PHY with RGMII/GMII | Microchip

The Microchip Technology VSC8641XJF is a single-port 10/100/1000BASE-T Gigabit Ethernet copper PHY with RGMII and GMII MAC interfaces, operating from 2.5 V and 3.3 V supply rails in an 88-pin QFN package with an exposed thermal pad. A PHY (Physical Layer transceiver) is the lowest layer of an Ethernet link. It converts parallel digital MAC data into differential copper signalling for twisted-pair cabling, and recovers clock and data from the received analogue waveform. In the OSI-style hierarchy, a PHY sits below the data link layer and the MAC controller: MAC -> PHY -> transformer -> twisted pair. Because the VSC8641XJF integrates the analogue front end, line drivers, comparators, clock recovery and digital interface logic on one die, it removes the discrete magnetics interface complexity that would otherwise dominate a copper Ethernet port design. Key features of the VSC8641XJF include a 1/1 driver-receiver configuration in a PHY transceiver, support for all three copper speeds (10, 100 and 1000 Mb/s) on a single port, full-duplex operation, and both RGMII and GMII MAC-side interfaces so it can attach to a wide range of switching silicon. The device runs from 2.5 V and 3.3 V supplies and is offered in an 88-VFQFN exposed-pad package suitable for surface-mount assembly and copper-heat-spreader land patterns. Architecturally the device is a low-power, highly integrated Gigabit PHY originally developed by Vitesse Semiconductor and now maintained by Microchip Technology. It is intended to pair with a separate MAC or switch ASIC over RGMII, which keeps the digital interconnect short and low-cost relative to integrating a full switch fabric on the same die. The exposed pad in the package provides the thermal path for the analogue and clocking sections during continuous 1000BASE-T operation. Typical end applications include standalone copper-to-fibre media converters, industrial and telecom access equipment, IP cameras and surveillance front ends, set-top and access gateways, and single-port Ethernet links embedded in test and measurement instruments. Any design that needs one deterministic, low-latency 1000BASE-T copper port with a selectable MAC interface benefits from the device. When designing around the VSC8641XJF, remember that the exposed pad must be tied to the ground plane and the MAC interface timing must be budgeted against the RGMII/GMII specification, since the PHY does not include the packet buffer that an integrated switch would provide. Because the device is listed by the manufacturer as not recommended for new designs, confirm lifecycle and support status before committing to a long production program. This page consolidates manufacturer and distributor documentation, parameter comparisons and drop-in alternatives into one engineering reference, adding design notes, thermal and layout guidance and parameter-by-parameter comparison tables that are not available on a single distributor listing.

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VSC8641XKO - Gigabit Ethernet PHY | Microchip | 100-LQFP
VSC8641XKO

VSC8641XKO - Gigabit Ethernet PHY | Microchip | 100-LQFP

The Microchip Technology VSC8641XKO is a single-port Gigabit Ethernet physical-layer transceiver for copper Ethernet links, supplied in a 100-LQFP package. The device operates from 2.5 V and 3.3 V supply rails and provides one integrated transceiver for Gigabit Ethernet designs using GMII or RGMII host interfaces. Its package is identified as 100-LQFP, while the ordering code XKO is associated with tray packaging in the component listing. A Gigabit Ethernet PHY is the physical-layer component that converts digital Ethernet data into electrical signaling for a twisted-pair cable and reconstructs incoming signaling into data for the network controller or communications processor. Within the Ethernet hierarchy, the VSC8641XKO sits between a MAC or switch fabric and the physical network medium. It is therefore relevant to industrial Ethernet equipment, network appliances, access systems, and embedded communications platforms that require a 1 GbE copper-network interface. The VSC8641 family is described by Vitesse Semiconductor as being designed for high-performance, low-power, and low-cost Gigabit Ethernet PHYs. The family combines a highly integrated GbE PHY with support for both GMII and RGMII connectivity, allowing the host interface to be selected according to processor pin availability and clocking requirements. The exact transceiver thresholds, internal reference requirements, latency, cable reach, and operating-temperature limits should be confirmed against the VSC8641 manufacturer datasheet before a circuit is released. For implementation, the VSC8641XKO requires a carefully designed Ethernet magnetics path, controlled clocking, suitable supply decoupling, and a PCB layout that preserves the high-speed differential signals. The 100-LQFP package provides many power, ground, analog, and digital interface connections, so its pin assignment and exposed routing requirements must be followed directly from the manufacturer pin-description table. Commercial availability and lifecycle decisions should also be reconfirmed with Microchip. Typical applications include industrial routers, network-interface controllers, Ethernet switches, embedded gateways, set-top equipment, and communications modules requiring a compact 1 GbE PHY. Because the VSC8641XKO is a dedicated interface device rather than a general-purpose processor, its value lies in reducing PHY implementation effort while preserving the flexibility of GMII or RGMII attachment to a host controller. This product overview combines the exact orderable MPN, package information, supply information, interface description, source links, and engineering guidance to support initial design evaluation. Use the Request a Quote form on this page for current commercial conditions, and verify lifecycle status, pin functions, electrical limits, and recommended magnetics against the current manufacturer documentation before production release.

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