VSC8502XML - Dual-Port GbE Copper PHY QFN-135 | Microchip
N.º da peça: VSC8502XML ✓ AtivoVSC8502XML Visão geral
An Ethernet PHY (physical layer transceiver) is the IC that connects a media access controller (MAC) to the physical copper or fiber medium. Sitting at the bottom of the networking IC hierarchy - Ethernet controller, MAC, PHY, magnetics, jack - the PHY performs analog line drivers and receivers, clock and data recovery, auto-negotiation, and 10/100/1000BASE-T encoding. The VSC8502 belongs to the copper PHY category of Ethernet interface ICs used in switching, routing, and embedded connectivity designs.
Key features include integrated line-side terminations, which eliminate up to 16 external precision resistors per port, conserve board space, reduce EMI, and improve system performance. Microchip further reduces bill-of-materials complexity and component count through integrated support circuitry. Dual integrated ports in one 12x12 mm package cut PHY count versus two single-port PHYs such as the KSZ9131, saving layout area and cost.
Architecturally, the VSC8502 integrates two independent gigabit copper PHY cores sharing a common digital host interface supporting (G/RG)MII modes, enabling connection to 16-bit or 32-bit MACs, switch fabrics, or processors. Energy-efficient Ethernet and low-power modes reduce system power during idle link periods, an important consideration for multiport industrial and enterprise equipment.
Typical applications include space-constrained 10/100/1000BASE-T designs: industrial Ethernet nodes and gateways, embedded switch and router line cards, IP surveillance cameras, networked test instruments, and server management (BMC) ports requiring dual copper links in a compact footprint.
A key design consideration is preserving the PHY-to-magnetics routing: with line-side termination integrated, keep the board trace between the QFN package and the transformer short and impedance-controlled at 100 ohms differential, and follow Microchip layout guidance for ground referencing.
This page adds value beyond the manufacturer datasheet by consolidating distributor availability, drop-in alternatives, application guidance, and practical design notes in one place for sourcing and design engineers.
Alternativas drop-in para VSC8502XML — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
VSC8502XML-03
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
VSC8502XML Especificações
| Ports | 2 (dual-port) |
| Taxa de dados | 10/100/1000 Mbps (10/100/1000BASE-T) |
| Interface | (G/RG)MII |
| Media | Copper (twisted pair) |
| Line-Side Termination | Integrated |
| Encapsulamento | 135-QFN (12x12 mm) |
| Tipo de montagem | Surface Mount |
| Product Category | Telecom IC - Ethernet PHY |
| Auto-Negotiation | Yes (10/100/1000BASE-T) |
Guia de Configuração de Pinos do VSC8502XML 135-qfn (12x12 mm)
Configuração de pinos para VSC8502XML (pacote 135-qfn (12x12 mm)). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para VSC8502XML.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
VSC8502XML é adequado para 6 aplicaçãos: Industrial Ethernet Nodes and Gateways, Embedded Switch and Router Line Cards, IP Surveillance Cameras, Server Management (BMC) Connectivity, Networked Test and Measurement Instruments, Smart Grid and Substation Automation.
Industrial Ethernet Nodes and Gateways
The VSC8502XML fits industrial Ethernet nodes and gateways that need two redundant copper gigabit links in a compact, EMI-tight enclosure. Its integrated line-side termination removes external termination resistor networks, cutting BOM count and board area while lowering radiated emissions - a direct benefit when equipment must pass industrial EMC test levels. The dual ports suit ring topologies, daisy-chained PROFINET/Modbus TCP devices, or a service port plus an uplink on one IC. With (G/RG)MII interfaces, it connects cleanly to industrial switch fabrics or embedded processors. Place it close to the magnetics with short 100-ohm differential routing, and confirm the -03 industrial temperature grade for harsh cabinet environments.
Recomendado
Embedded Switch and Router Line Cards
In compact switch and router designs, the VSC8502XML provides two 10/100/1000BASE-T copper ports per IC, letting designers scale port density linearly while sharing a common firmware and register model across ports. Integrated line-side termination simplifies the magnetics interface on dense line cards, where every square millimeter of PHY-to-jack routing matters, and reduces EMI in fanless or lightly vented housings. The (G/RG)MII host options let each port map to a switch fabric port or a processor MAC. Consider power budgeting across many PHY instances: use the device's low-power modes during link-idle periods, and verify thermal spreading through the QFN ground paddle to the card's internal ground planes.
Recomendado
IP Surveillance Cameras
Network security cameras benefit from the VSC8502XML's dual copper ports: one for the PoE data uplink and a second for daisy-chain or analytics out-of-band links in multi-camera deployments. The integrated line-side termination reduces the PHY-side component count on densely packed camera main boards, freeing layout space for image sensors and compression SoCs, and its low-EMI operation helps designs pass the conducted and radiated emissions testing common in surveillance certifications. The (G/RG)MII interface connects to camera SoCs offering GMII or RGMII MACs. Keep the PHY-to-magnetics trace short and impedance controlled at 100 ohms differential, and use the PHY's power-saving modes for idle-link energy compliance.
Recomendado
Server Management (BMC) Connectivity
Server baseboard management controllers often require dedicated out-of-band Ethernet ports for remote management, KVM-over-IP, and telemetry. The VSC8502XML provides two independent gigabit copper PHYs in one 135-QFN (12x12 mm) device, letting a single IC serve both the dedicated management port and a shared or failover link. Integrated line-side termination reduces board complexity around the magnetics, valuable on crowded server mainboards, and (G/RG)MII interfaces match common BMC SoC MAC offerings. For reliability-focused designs, verify the PHY's link-status register behavior during host reset to ensure the management channel stays observable, and follow Microchip's reference schematic for clocking and reset sequencing.
Recomendado
Networked Test and Measurement Instruments
Bench and rack instruments increasingly expose dual Ethernet interfaces - one for instrument control (VXI-11/LXI-style protocols) and one for streaming measurement data. The VSC8502XML supplies both ports from a single IC with (G/RG)MII connections to the instrument processor, and its integrated line-side termination simplifies the rear-panel magnetics layout where chassis grounding and EMI control are critical. Gigabit throughput sustains high-rate waveform streaming, while the copper-only dual-port configuration avoids unused SGMII pins. Ensure the 135-QFN paddle bonds solidly to the instrument's ground plane for thermal and EMC performance, and budget a stable low-jitter reference clock per Microchip's clocking requirements.
Recomendado
Smart Grid and Substation Automation
Protection relays, RTUs, and substation gateways typically need redundant Ethernet ports for ring or PRP-style topologies, making the VSC8502XML's dual copper gigabit PHYs in one package an efficient fit. Its integrated line-side termination lowers EMI in electrically noisy substation environments and shrinks the termination network on boards that also carry isolation barriers. The (G/RG)MII interfaces connect to processors running IEC 61850-class protocol stacks, and gigabit rates handle sampled-values traffic alongside SCADA. Use the extended-temperature VSC8502XML-03 variant where ambient ranges demand it, keep magnetics isolation clearances per the relay's insulation design, and verify link-loss reaction time for the ring-recovery scheme in use.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para VSC8502XML — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | VSC8502XML-03 | VSC8541XMV-03 |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Ports | 2 (dual copper) | 2 (dual copper) | Dual-port, copper + SGMII/fiber capable |
| Data Rate | 10/100/1000BASE-T | 10/100/1000BASE-T | 10/100/1000BASE-T |
| Host Interface | (G/RG)MII | (G/RG)MII | (G/RG)MII + SGMII |
| Drop-In Compatible | - | Yes - same package, pin-to-pin | No - different package |
Principais diferenciais
- Dual ports in one package (vs KSZ9131RNXC)
- Integrated line-side termination (vs KSZ9021GN-TR)
- Extended industrial temperature option without redesign (vs VSC8502XML-03)
Notas de projeto
Route the PHY-to-magnetics traces as short, length-matched 100-ohm differential pairs. Because the VSC8502 integrates line-side termination, the terminating network lives inside the IC - do not add external 49.9-ohm Bob Smith termination resistors unless the datasheet revision for your variant requires them. Follow Microchip's reference schematic for this family, and keep a solid, unbroken ground plane under the differential pairs from the 135-QFN balls to the transformer center taps.
The 135-QFN (12x12 mm) package dissipates heat through its exposed paddle. Connect the paddle to at least four or five thermal vias down to internal ground planes, as recommended in Microchip's QFN layout guidance. For multi-PHY boards, stagger PHY placement to avoid localized hot spots and verify plane connectivity rather than relying on thermal relief patterns, which reduce heat transfer through the via barrel.
Confirm the exact ordering-code suffix before production: the base VSC8502XML and the -03 variant differ in temperature grade, and mixing grades can cause field failures in hot enclosures. Also confirm clock source requirements (crystal versus external oscillator) against the manufacturer datasheet, since an incorrect reference clock frequency or stability class is the most common cause of gigabit link-drop issues on copper PHY designs.
Informações de conformidade
Compliance status not stated in the retrieved product listings; confirm on the Microchip product page or datasheet ordering information.
