VSC8531XMW - Single-Port GbE Cu PHY | Microchip Technology
MPN: VSC8531XMW ✓ ActiveVSC8531XMW Overview
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.
Drop-in alternatives for VSC8531XMW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with VSC8531XMW (same form factor and footprint) — differing in Package, MAC Interface, Product Type.
VSC8531XMW-01
✅ Drop-In📋 Reference alternative (not in catalog)
VSC8531XMW-02
✅ Drop-InContact for price
View Datasheet →VSC8531XMW-05
✅ Drop-InContact for price
View Datasheet →VSC8531XMW Specifications
| Product Type | Single-port Gigabit Ethernet copper PHY |
| Ethernet Standards | 10/100/1000BASE-T |
| MAC Interface | RGMII and RMII |
| Copper Port Count | 1 port |
| Package | 48-QFN, 6 mm x 6 mm, single-row |
| Integrated Line-Side Termination | Yes |
| RGMII Timing Compensation | RGMII version 2.0 standard timing compliant compensation |
| External Delay-Line Requirement | Eliminated by integrated RGMII timing compensation |
| MAC Interface Drive Strength | Configurable |
| Device Supply Levels | 0.95 V and 2.38 V |
| Power Class | Low-power PHY |
| Mounting Type | Surface mount |
| Exposed Thermal Pad | Present in 48-QFN package |
| Environmental Compliance | EcoEthernet 2.0 with Energy Efficient Ethernet (EEE) |
VSC8531XMW 48-qfn, 6 mm x 6 mm, single-row Pin Configuration Guide
Pin configuration for VSC8531XMW (48-qfn, 6 mm x 6 mm, single-row package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for VSC8531XMW.
Refer to the datasheet for full pin configuration.
Typical Applications
VSC8531XMW is suitable for 6 applications: Compact Industrial Ethernet Gateway, Wireless Access Point Ethernet Uplink, Single-Port Network Switch, Embedded Linux Platform, Set-Top Box and Media Endpoint, Telecom Access Equipment.
Compact Industrial Ethernet Gateway
The VSC8531XMW fits an industrial gateway that requires one Gigabit copper port without allocating a large PCB area to the Ethernet front end. Its 48-QFN package measures 6 mm by 6 mm, while integrated line-side termination reduces the component count beside the network transformer and supports lower EMI. The RGMII or RMII choice lets the designer match the interface to the gateway processor rather than adding a level translator. Placing the PHY close to the RJ45 and transformer also keeps the copper-side differential routing short and consistent.
Recommended
Wireless Access Point Ethernet Uplink
The VSC8531XMW provides a space-efficient Gigabit copper uplink for wireless access-point and embedded networking equipment. RGMII supports higher-throughput controller connections, and the version 2.0 timing-compensation function can remove external on-board delay lines, simplifying the relationship between MAC timing and PHY timing. The single-row 6 mm by 6 mm QFN package leaves more board area for radio, antenna, and power-supply sections. Integrated line-side termination also keeps the high-speed copper interface compact while reducing discrete components near the connector.
Recommended
Single-Port Network Switch
The VSC8531XMW is appropriate for a compact unmanaged or managed switch that presents one 10/100/1000BASE-T port. It supports both RGMII and RMII MAC interfaces, giving the switch controller an option between a wider data bus and a lower-pin-count implementation. The integrated line-side termination conserves board space and can lower connector-area EMI, while the small 48-QFN footprint supports dense port spacing. Care should be taken to maintain consistent isolation between adjacent copper ports and to provide adequate thermal-via support under the exposed pad.
Recommended
Embedded Linux Platform
The VSC8531XMW serves as the copper Ethernet front end in an embedded Linux or RTOS-based controller. RMII can reduce interconnect width when the host SoC has limited GPIO resources, while RGMII offers a higher-throughput path for Gigabit traffic. The 0.95 V and 2.38 V device supply levels should be reconciled with the platform's power architecture, and the MAC driver must be matched to the selected interface and PHY configuration. Placement near the connector and transformer remains important for minimizing copper-side losses and EMI.
Recommended
Set-Top Box and Media Endpoint
The VSC8531XMW suits a set-top box or media endpoint that needs a reliable copper network connection in a constrained enclosure. Its low-power 6 mm by 6 mm QFN construction leaves room for decoding, memory, and power circuitry, while integrated termination reduces the footprint around the transformer. The RGMII timing-compensation capability can simplify high-speed interface implementation when the host controller provides a compatible MAC. Thermal-via placement and controlled copper-side routing should be reviewed alongside the enclosure's EMI environment.
Recommended
Telecom Access Equipment
The VSC8531XMW can provide the service-facing Ethernet copper port in compact telecom access equipment. The device handles 10/100/1000BASE-T operation, and its integrated line-side termination helps limit connector-area EMI while reducing board size. RGMII or RMII allows the PHY to be paired with an access controller, FPGA, or communications processor according to throughput requirements. The exposed-pad thermal design and the exact ordering code's temperature and qualification terms should be reviewed for the deployment environment.
Recommended
Recommended Products Summary
Engineering reference data for VSC8531XMW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | VSC8531XMW-01 | VSC8531XMW-02 | VSC8531XMW-05 |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-QFN (6x6) | 48-QFN (6x6) - same | 48-QFN (6x6) - same | 48-QFN (6x6) - same |
| Device Type | Single-port Gigabit Ethernet copper PHY | VSC8531 family Ethernet PHY | VSC8531 family Ethernet PHY | VSC8531 family Ethernet PHY |
| Copper Port Count | 1 port | 1 port | 1 port | 1 port |
| Supported Data Rates | 10/100/1000 Mb/s | 10/100/1000 Mb/s | 10/100/1000 Mb/s | 10/100/1000 Mb/s |
| MAC Interface | RGMII and RMII | RGMII and RMII | RGMII and RMII | RGMII and RMII |
| Integrated Line-Side Termination | Yes | Yes | Yes | Yes |
| RGMII Timing Compensation | RGMII version 2.0 compliant compensation | Yes | Yes | Yes |
Key Differentiators
- Integrated copper termination in a compact package (vs VSC8531XMW-01)
- RGMII timing compensation simplifies interface implementation (vs VSC8531XMW-02)
- Choice of RGMII or RMII for host flexibility (vs VSC8531XMW-05)
Design Notes
Place the PHY as close as practical to the RJ45 connector and network transformer. Keep the copper-side differential pairs short, symmetrical, and free of test-point stubs, while maintaining consistent ground references. Integrated line-side termination reduces external components, but its benefit depends on keeping the PHY-to-connector interconnect electrically short.
Use the manufacturer reference layout for component spacing and high-speed interface routing. Treat RGMII or RMII signals as a source-synchronous group, minimize vias, and provide a continuous ground plane beneath the interface region. Place decoupling capacitors next to their associated supply pins and verify the exposed-pad connection with multiple thermal vias where the recommended layout permits.
Integrated line-side termination can lower connector-area EMI, but it does not remove the need for controlled return paths. Keep switching regulators and their inductors away from the copper-side pairs, avoid routing RGMII beneath noisy power stages, and maintain spacing from chassis or enclosure metal according to the transformer and connector recommendations.
Compliance Information
The related VSC8531XMW-01 family listing identifies EcoEthernet 2.0 with Energy Efficient Ethernet. Specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations for this ordering code are not stated in the available records.
