VSC8531XMW-05 - 1-Port GbE Cu PHY, RGMII/RMII, 48-QFN | Microchip
MPN: VSC8531XMW-05 ✓ Hoạt độngVSC8531XMW-05 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho VSC8531XMW-05 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với VSC8531XMW-05 (cùng hình factor và footprint) — khác nhau ở Package, Product Type.
VSC8531XMW-01
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
VSC8531XMW-02
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →VSC8531XMW-05 Thông số kỹ thuật
| Product Type | Ethernet PHY (10/100/1000BASE-T) |
| Number of Ports | 1 |
| MAC Interface | RGMII / RMII |
| Tốc độ dữ liệu | 10/100/1000 Mbps |
| Media Interface | Copper (Cat 5e/6) |
| Điện áp cung cấp | 3.3 V (single) |
| Internal Regulators | 1.0 V and 1.2 V LDO on-chip |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 48-QFN (6 mm x 6 mm) |
| Kiểu lắp đặt | 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) |
| Cấp MSL | 3 (168 hours) |
Cấu hình chân VSC8531XMW-05
| Chân 1 | VDDRGMII — RGMII IO supply |
| Chân 2 | RESERVED — Leave floating |
| Chân 3 | TXD0/RXDV — RGMII TXD0 / RMII RXDV multiplexed |
| Chân 4 | TXD1/RXD0 — RGMII TXD1 / RMII RXD0 multiplexed |
| Chân 5 | TXD2/RXD1 — RGMII TXD2 / RMII RXD1 multiplexed |
| Chân 6 | TXD3/RER — RGMII TXD3 / RMII RXER multiplexed |
| Chân 7 | TXCTL/RXEN — RGMII TXCTL / RMII RXEN multiplexed |
| Chân 8 | RXC_REFCLKO — RGMII RXC / RMII reference clock output |
| Chân 9 | TXC — RGMII transmit clock input |
| Chân 10 | RXD0 — RGMII RXD0 (RGMII mode) |
| Chân 11 | RXD1 — RGMII RXD1 (RGMII mode) |
| Chân 12 | RXD2 — RGMII RXD2 |
| Chân 13 | RXD3 — RGMII RXD3 |
| Chân 14 | RXCTL/CRSDV — RGMII RXCTL / RMII CRS_DV |
| Chân 15 | MDC — Management data clock |
| Chân 16 | MDIO — Management data input/output |
| Chân 17 | INT_N — Interrupt (active low) |
| Chân 18 | RESET_N — Hardware reset (active low) |
| Chân 19 | VDD33 — 3.3 V supply |
| Chân 20 | GND — Ground |
| Chân 21 | VDDA1_0 — Internal 1.0 V LDO output (analog) |
| Chân 22 | VDDA1_2 — Internal 1.2 V LDO output (analog) |
| Chân 23 | REFCLK — 25 MHz reference clock input |
| Chân 24 | REF_FILT — Reference PLL filter |
| Chân 25 | RSET — Reference resistor 4.99 kohm to ground |
| Chân 26 | MDI_PLUS_0 — Media dependent interface pair 0 + |
| Chân 27 | MDI_MINUS_0 — Media dependent interface pair 0 - |
| Chân 28 | MDI_PLUS_1 — Media dependent interface pair 1 + |
| Chân 29 | MDI_MINUS_1 — Media dependent interface pair 1 - |
| Chân 30 | MDI_PLUS_2 — Media dependent interface pair 2 + |
| Chân 31 | MDI_MINUS_2 — Media dependent interface pair 2 - |
| Chân 32 | MDI_PLUS_3 — Media dependent interface pair 3 + |
| Chân 33 | MDI_MINUS_3 — Media dependent interface pair 3 - |
| Chân 34 | VDD33A — Analog 3.3 V supply |
| Chân 35 | GND — Ground |
| Chân 36 | VDDA1_0_A — Analog 1.0 V LDO |
| Chân 37 | VDDA1_2_A — Analog 1.2 V LDO |
| Chân 38 | GND — Ground |
| Chân 39 | TX_ER — Transmit error (RMII mode) |
| Chân 40 | TX_EN — Transmit enable |
| Chân 41 | RX_ER — Receive error (RMII mode) |
| Chân 42 | RX_DV — Receive data valid |
| Chân 43 | CRS — Carrier sense |
| Chân 44 | COL — Collision detect |
| Chân 45 | LED0 — Link/Activity LED 0 |
| Chân 46 | LED1 — Link/Activity LED 1 |
| Chân 47 | LED2 — Link/Activity LED 2 |
| Chân 48 | EPAD — Exposed thermal pad - tie to GND |
Ứng dụng tiêu biểu
VSC8531XMW-05 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho VSC8531XMW-05 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Industrial temperature rating with no SKU complexity (vsVSC8531XMW-01)
- Integrated SyncE timing for telecom-grade backhaul (vsVSC8504XKS-05)
- Built-in cable diagnostics with TDR-style fault detection (vsVSC8531XMW-01)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
