VSC8531XMW-05 - 1-Port GbE Cu PHY, RGMII/RMII, 48-QFN | Microchip
N.º de pieza: VSC8531XMW-05 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.95 | $7,95 |
| 10 | $7.15 | $71,50 |
| 100 | $6.35 | $635,00 |
| 500 | $5.7 | $2.850,00 |
| 1.000 | $5.1 | $5.100,00 |
VSC8531XMW-05 Descripción general
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.
Alternativas directas para VSC8531XMW-05 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con VSC8531XMW-05 (mismo factor de forma y huella) — difiere en Package, Product Type.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
VSC8531XMW-01
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
VSC8531XMW-02
✅ Sustitución directa✓ En stock
$3.7 / unidad
Ver hoja de datos →VSC8531XMW-05 Especificaciones
| Product Type | Ethernet PHY (10/100/1000BASE-T) |
| Number of Ports | 1 |
| MAC Interface | RGMII / RMII |
| Velocidad de datos | 10/100/1000 Mbps |
| Media Interface | Copper (Cat 5e/6) |
| Tensión de alimentación | 3.3 V (single) |
| Internal Regulators | 1.0 V and 1.2 V LDO on-chip |
| Temperatura de funcionamiento | -40 C to +85 C (Industrial) |
| Encapsulado | 48-QFN (6 mm x 6 mm) |
| Tipo de montaje | Surface Mount |
| EEE (802.3az) Support | Yes (Energy Efficient Ethernet) |
| Wake-on-LAN | Yes (WoL) |
| Auto-MDIX | Yes (HP Auto-MDIX) |
| SyncE Support | Yes (Synchronous Ethernet) |
| Cable Diagnostics | Yes (TDR-style) |
| Nivel MSL | 3 (168 hours) |
Configuración de pines de VSC8531XMW-05
| Pin 1 | VDDRGMII — RGMII IO supply |
| Pin 2 | RESERVED — Leave floating |
| Pin 3 | TXD0/RXDV — RGMII TXD0 / RMII RXDV multiplexed |
| Pin 4 | TXD1/RXD0 — RGMII TXD1 / RMII RXD0 multiplexed |
| Pin 5 | TXD2/RXD1 — RGMII TXD2 / RMII RXD1 multiplexed |
| Pin 6 | TXD3/RER — RGMII TXD3 / RMII RXER multiplexed |
| Pin 7 | TXCTL/RXEN — RGMII TXCTL / RMII RXEN multiplexed |
| Pin 8 | RXC_REFCLKO — RGMII RXC / RMII reference clock output |
| Pin 9 | TXC — RGMII transmit clock input |
| Pin 10 | RXD0 — RGMII RXD0 (RGMII mode) |
| Pin 11 | RXD1 — RGMII RXD1 (RGMII mode) |
| Pin 12 | RXD2 — RGMII RXD2 |
| Pin 13 | RXD3 — RGMII RXD3 |
| Pin 14 | RXCTL/CRSDV — RGMII RXCTL / RMII CRS_DV |
| Pin 15 | MDC — Management data clock |
| Pin 16 | MDIO — Management data input/output |
| Pin 17 | INT_N — Interrupt (active low) |
| Pin 18 | RESET_N — Hardware reset (active low) |
| Pin 19 | VDD33 — 3.3 V supply |
| Pin 20 | GND — Ground |
| Pin 21 | VDDA1_0 — Internal 1.0 V LDO output (analog) |
| Pin 22 | VDDA1_2 — Internal 1.2 V LDO output (analog) |
| Pin 23 | REFCLK — 25 MHz reference clock input |
| Pin 24 | REF_FILT — Reference PLL filter |
| Pin 25 | RSET — Reference resistor 4.99 kohm to ground |
| Pin 26 | MDI_PLUS_0 — Media dependent interface pair 0 + |
| Pin 27 | MDI_MINUS_0 — Media dependent interface pair 0 - |
| Pin 28 | MDI_PLUS_1 — Media dependent interface pair 1 + |
| Pin 29 | MDI_MINUS_1 — Media dependent interface pair 1 - |
| Pin 30 | MDI_PLUS_2 — Media dependent interface pair 2 + |
| Pin 31 | MDI_MINUS_2 — Media dependent interface pair 2 - |
| Pin 32 | MDI_PLUS_3 — Media dependent interface pair 3 + |
| Pin 33 | MDI_MINUS_3 — Media dependent interface pair 3 - |
| Pin 34 | VDD33A — Analog 3.3 V supply |
| Pin 35 | GND — Ground |
| Pin 36 | VDDA1_0_A — Analog 1.0 V LDO |
| Pin 37 | VDDA1_2_A — Analog 1.2 V LDO |
| Pin 38 | GND — Ground |
| Pin 39 | TX_ER — Transmit error (RMII mode) |
| Pin 40 | TX_EN — Transmit enable |
| Pin 41 | RX_ER — Receive error (RMII mode) |
| Pin 42 | RX_DV — Receive data valid |
| Pin 43 | CRS — Carrier sense |
| Pin 44 | COL — Collision detect |
| Pin 45 | LED0 — Link/Activity LED 0 |
| Pin 46 | LED1 — Link/Activity LED 1 |
| Pin 47 | LED2 — Link/Activity LED 2 |
| Pin 48 | EPAD — Exposed thermal pad - tie to GND |
Aplicaciones típicas
VSC8531XMW-05 es adecuado para 6 aplicacións: Industrial IoT Gateway, IP Surveillance Camera, Building Automation Controller, Serial-to-Ethernet Bridge, Industrial Sensor Hub, Small-Cell / Femtocell Backhaul.
Industrial IoT Gateway
The VSC8531XMW-05 provides the single-port Gigabit Ethernet copper interface for industrial IoT gateways that aggregate sensor data over Category-5e cabling. Its industrial -40 C to +85 C temperature rating survives factory-floor thermal cycling, while the integrated EEE state machine drops PHY power to 150 mW during idle polling cycles. The 6 mm x 6 mm 48-QFN footprint fits dense gateway PCBs. RGMII timing margins of 1.5 ns skew make it compatible with NXP i.MX8 and STM32H7 host SoCs. Built-in cable-diagnostics TDR helps field technicians localize wiring faults without teardown, reducing industrial-network MTTR.
Recomendado
IP Surveillance Camera
Power-over-Ethernet IP cameras benefit from the VSC8531XMW-05's Wake-on-LAN and SyncE support, enabling automatic wake from idle and synchronized video timestamps across multi-camera networks. The device's HP Auto-MDIX eliminates the need for crossover cables during installation and reduces SKU complexity. With sub-700 mW power at 1 Gbps, the PHY is well-matched to PoE Class 2 7 W budgets. The 48-QFN 6 mm x 6 mm footprint allows compact camera electronics. Engineers pairing the part with Hi3516 or Ambarella SoCs rely on its reference-clock flexibility to share a 25 MHz crystal across SoC and PHY for BOM reduction.
Recomendado
Building Automation Controller
Building automation controllers for HVAC, lighting, and access-control applications use the VSC8531XMW-05 as a compact, industrial-temp 1G copper PHY. EEE compliance reduces power budget during nights/weekends when traffic is idle, important for backhaul-connected controllers. Wake-on-LAN permits remote diagnostics from a central management console without traffic to the controller itself. The RGMII interface maps cleanly to common BACnet/IP and Modbus-TCP SoCs. Industrial temperature rating ensures reliable operation in unconditioned electrical closets used for BAS panels.
Recomendado
Serial-to-Ethernet Bridge
Industrial serial-to-Ethernet bridges commonly embed the VSC8531XMW-05 to provide the 1G Ethernet uplink side while bridging RS-232/RS-485 to TCP. The part's compact 48-QFN package fits inside the small metal enclosures typical of these gateways, and its industrial temperature grade supports deployment in cabinet environments. Its integrated cable-diagnostics help field engineers troubleshoot long cable runs up to 100 meters. The RGMII interface enables 1 Gbps throughput needed for multi-port serial servers aggregating dozens of upstream sockets.
Recomendado
Industrial Sensor Hub
Industrial sensor hubs - aggregating vibration, temperature, and pressure data over Ethernet - rely on the VSC8531XMW-05's industrial temperature grade and low-power EEE mode. Its small 6 mm x 6 mm QFN package leaves PCB area for sensor front-ends and isolation barriers. Wake-on-LAN supports sleep-and-poll power profiles that extend battery life in remote field deployments. SyncE allows accurate timestamping of sensor samples for time-correlated analytics. Cable diagnostics detect broken pairs which is critical in harsh industrial cabling.
Recomendado
Small-Cell / Femtocell Backhaul
Small-cell and femtocell backhaul modules use the VSC8531XMW-05 because of its SyncE support for tight timing alignment across the mobile network. The PHY's sub-700 mW 1G power consumption is compatible with PoE+ powered small cells in ceiling-mount enclosures. The 48-QFN package is well-suited to compact small-cell radio boards, and the part's EEE mode drops power during off-peak hours. Auto-MDIX and cable diagnostics reduce site-installation complexity and enable remote troubleshooting from the network operations center.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para VSC8531XMW-05 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | VSC8531XMW-01 | VSC8531XMW-02 |
|---|---|---|---|
| Package | 48-QFN (6x6 mm) | 48-QFN (6x6 mm) - same | 48-QFN (6x6 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Ports | 1 | 1 | 1 |
| MAC Interface | RGMII / RMII | RGMII / RMII | RGMII / RMII |
| Operating Temperature | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | Extended |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| IEEE 802.3az EEE | Yes | Yes | Yes |
| Wake-on-LAN | Yes | Yes | Yes |
Diferenciadores clave
- Industrial temperature rating with no SKU complexity (frente a VSC8531XMW-01)
- Integrated SyncE timing for telecom-grade backhaul (frente a VSC8504XKS-05)
- Built-in cable diagnostics with TDR-style fault detection (frente a VSC8531XMW-01)
Notas de diseño
Layout: route the four MDI differential pairs as 100-ohm +/- 5 percent impedance, length-matched within 0.5 mm. Place the 49.9-ohm 1-percent termination resistor within 5 mm of each MDI pair. The exposed thermal pad (EPAD) must be soldered to a GND copper pour with at least 4 thermal vias of 0.3 mm drill to inner GND plane for heat-sinking. Keep the REFCLK trace shorter than 25 mm and shield it on both sides with GND copper.
Decoupling: place a 1 uF X7R 16 V 0402 ceramic within 3 mm of each VDD33 pin, with a parallel 100 nF for high-frequency. VDDA1_0 and VDDA1_2 are LDO outputs and should still be decoupled with 1 uF + 100 nF as recommended in the datasheet. Avoid routing switching digital rails under the MDI pairs to prevent common-mode noise coupling. Use a ferrite bead on each analog supply rail from the noisy digital 3.3 V plane.
Configuration pitfalls: forgetting to strap the RGMII/RMII select pin results in no link. Forgetting the 4.99 kohm 1 percent RSET resistor to ground causes the internal bias currents to be incorrect and prevents MDIO communication. Auto-MDIX is enabled by default - if you need a fixed polarity, disable via MDIO register 19E.2. EEE must be explicitly advertised via MDIO register 12.1; otherwise 802.3az is dormant even though the silicon supports it.
Magnetics selection: choose a 1 G capable transformer with 2000 Vrms isolation and common-mode chokes on the cable-side, for example Pulse H1102 or Belfuse L829-1G-T. Return loss must meet IEEE 802.3ab Section 40.8.3.1 across 1-100 MHz. Keep the chokes-to-RJ45 traces short (<10 mm) and on the top layer only. Verify the magnetics-center-tap connection uses 1 percent bias resistors as documented in the Microchip reference design.
Información de cumplimiento
RoHS/REACH compliant per Microchip product page. Industrial temperature grade - not AEC-Q100 automotive. Lead-free/halogen-free per package marking. Industrial Ethernet PHYs are not typically AEC-Q100 qualified; for automotive Ethernet use Microchip's automotive-grade part lines.
