W6300-Q - 10/100 IPv4/IPv6 Hardwired TCP/IP Ethernet | WIZnet
MPN: W6300-Q ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.08 | $308.00 |
| 500 | $2.77 | $1,385.00 |
| 1,000 | $2.49 | $2,490.00 |
W6300-Q Overview
An Ethernet controller chip is an integrated circuit that handles the physical (PHY) and data-link layers of Ethernet communication, offloading the host microcontroller from handling network protocols in software. The W6300 belongs to the broader hierarchy of Ethernet MAC/PHY controllers -> network interface ICs -> interface ICs -> semiconductors. WIZnet's hardwired (TOE) approach implements the TCP/IP stack in dedicated silicon logic rather than firmware, so the host MCU needs only simple register read/write operations over SPI or a parallel bus to send and receive network packets.
Key features include the Dual IPv4/IPv6 hardware stack, which future-proofs designs for modern IPv6 networks without software TCP/IP libraries, and the high-speed Quad SPI host interface operating in Single, Dual, and Quad modes. Multiple hardware sockets are supported, letting several communication channels run concurrently in hardware.
Low-power design features include Wake On LAN (WOL) and an Ethernet PHY Power Down Mode, allowing the chip to consume minimal power while remaining capable of waking the system on network activity. These make the W6300 suitable for battery-conscious and always-on connected products.
Typical applications include industrial automation and factory networking equipment, IoT gateways that aggregate sensor traffic, and embedded networking nodes such as PLCs, remote I/O modules, and networked control systems that require deterministic, MCU-light Ethernet connectivity with IPv6 readiness.
Design consideration: verify the host interface choice early. Quad SPI offers the highest throughput with fewest pins, while the parallel system bus suits MCUs with external memory interfaces. Pin muxing between the two interface modes must be confirmed against the manufacturer datasheet before layout.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with data verified as of 2026-10-19.
Drop-in alternatives for W6300-Q — 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 W6300-Q (same form factor and footprint) — differing in Host Interface, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
W6100
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
W5500
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.78 / Unit
View Datasheet →W5100S
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
W6300-Q Specifications
| Ethernet Speed | 10/100 Mbps |
| Protocol Stack | Hardwired TCP/IP (TOE) with Dual IPv4/IPv6 support |
| Host Interface | Quad SPI (Single/Dual/Quad Mode) and Parallel System BUS |
| Package | 48-pin EPAD-LQFP or 48-pin QFN, lead-free |
| Package Drawing Suffix | -Q (WIZnet packaging variant) |
| Wake On LAN (WOL) | Supported |
| PHY Power Down Mode | Supported |
| Multiple Socket Support | Yes (hardware sockets) |
| Mounting Type | Surface Mount |
| RoHS / Lead-Free | Lead-free package (per datasheet) |
| Number of Pins | 48 |
| Typical Applications | Industrial automation, IoT gateways, embedded networking |
| Lifecycle Status | Active (per WIZnet product page) |
W6300-Q -q (wiznet packaging variant) Pin Configuration Guide
Pin configuration for W6300-Q (-q (wiznet packaging variant) 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 W6300-Q.
Refer to the datasheet for full pin configuration.
Typical Applications
W6300-Q is suitable for 6 applications: Industrial Automation Networking, IoT Gateways, Embedded Networked Control (PLCs and Remote I/O), Smart Building and Facility Connectivity, Networked Security and Surveillance Equipment, Test, Measurement and Networked Instruments.
Industrial Automation Networking
The W6300-Q fits industrial automation nodes because its hardwired TCP/IP offload delivers deterministic packet handling with near-zero MCU load, and the dual IPv4/IPv6 stack supports both legacy factory IPv4 networks and modern IPv6 infrastructure. Using the Quad SPI interface in Quad mode, a mid-range MCU can sustain full 100 Mbps line-rate transfers while dedicating cycles to control logic. Placed between the host MCU and RJ45 magnetics, the W6300 replaces a software TCP/IP library with silicon, eliminating stack jitter and licensing concerns. The parallel system bus variant suits PLC-class processors with external bus interfaces. Wake On LAN enables remote maintenance wake-up of dormant equipment, reducing site visits in factory settings.
Recommended
IoT Gateways
IoT gateways benefit directly from the W6300-Q's Dual IPv4/IPv6 hardware stack: the gateway can bridge sensor-side IPv4 devices to IPv6 cloud endpoints entirely in hardware, freeing the host processor for protocol translation and security tasks. The Quad SPI interface provides the headroom to move aggregated multi-sensor traffic at full 100 Mbps without saturating the MCU bus. Hardware sockets allow several simultaneous uplink and local channels. The PHY Power Down Mode supports duty-cycled or energy-harvesting gateway designs, while Wake On LAN lets the gateway sleep and be woken by management traffic, cutting standby power substantially in always-connected deployments.
Recommended
Embedded Networked Control (PLCs and Remote I/O)
Remote I/O modules and compact PLCs use the W6300-Q to add 10/100 Ethernet without redesigning the host firmware around a TCP/IP stack. The hardwired socket architecture gives each I/O channel a dedicated hardware socket, so Modbus TCP, EtherNet/IP-style polling, or raw TCP streams run concurrently in silicon with predictable latency. The parallel system bus integrates cleanly with processor families that expose external memory interfaces, while Quad SPI suits smaller MCUs. Because protocol processing is fixed-function, cycle-to-cycle response time is stable - a key requirement for deterministic control loops. Lead-free 48-pin packages keep module footprints compact for DIN-rail electronics.
Recommended
Smart Building and Facility Connectivity
Smart building controllers - lighting managers, HVAC gateways, access-control panels - increasingly face IPv6-only municipal or enterprise networks. The W6300-Q's dual-stack hardware means a BACnet/IP or custom TCP controller can be deployed on either protocol family without firmware changes. The hardwired stack removes real-time OS network dependencies, simplifying safety-related certification of the host firmware. PHY Power Down Mode supports occupancy-driven sleep schedules, and Wake On LAN permits facility managers to wake controllers for scheduled commissioning or firmware updates. The 48-pin EPAD-LQFP with exposed pad provides solid thermal and ground connections on cost-driven two-to-four-layer control boards.
Recommended
Networked Security and Surveillance Equipment
Access controllers, alarm panels, and camera-adjacent edge devices need reliable, sustained Ethernet throughput. The W6300-Q's Quad SPI interface in Quad mode provides the bandwidth for continuous event streaming, while the hardware stack guarantees that TCP retransmission and framing logic never consumes host CPU cycles needed for cryptographic or video processing. Dual IPv4/IPv6 support addresses the ongoing IPv6 migration of security-management platforms. Wake On LAN supports night-time standby of perimeter devices with instant network-triggered wake. The chip's offload nature also shortens firmware development cycles because no third-party TCP/IP middleware porting or certification is required for the host MCU.
Recommended
Test, Measurement and Networked Instruments
Bench instruments and data loggers use the W6300-Q to expose SCPI-over-TCP or web dashboards. The hardwired stack delivers consistent socket throughput regardless of the instrument's main processor load, which matters when acquiring high-rate data while serving live measurement results over the network. IPv6 readiness ensures instruments remain addressable on modern lab and campus networks adopting dual-stack or IPv6-only VLANs. Quad SPI keeps the host interface off conventional peripherals, and the parallel bus option integrates with DSP-class acquisition processors. PHY Power Down enables battery-powered portable instruments to drop link power between logging sessions, extending field operating time measurably.
Recommended
Recommended Products Summary
Engineering reference data for W6300-Q — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | W6100 | W5500 | W5100S |
|---|---|---|---|---|
| Package | 48-pin EPAD-LQFP / 48-pin QFN (lead-free) | 48-pin LQFP - same pin count, different footprint | 48-pin LQFP - same pin count, different footprint | 48-pin LQFP - same pin count, different footprint |
| Brand | WIZnet | WIZnet | WIZnet | WIZnet |
| Ethernet Speed | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| IPv6 Support | Yes (Dual IPv4/IPv6 hardware stack) | Yes (Dual IPv4/IPv6 hardware stack) | No (IPv4 only) | No (IPv4 only) |
| Host Interface | Quad SPI (Single/Dual/Quad) + Parallel System BUS | Standard SPI | Standard SPI | Standard SPI |
| Hardware Sockets | Yes (multiple hardware sockets) | Yes (8 sockets) | Yes (8 sockets) | Yes (4 sockets) |
| Pin-to-Pin Compatibility with W6300-Q | Reference part | Not pin-identical - PCB rework required | Not pin-identical - PCB rework required | Not pin-identical - PCB rework required |
Key Differentiators
- Dual IPv4/IPv6 hardware stack (vs W5500)
- Quad SPI host interface with Single/Dual/Quad modes plus parallel bus (vs W6100)
- Low-power features (WOL + PHY Power Down) (vs W5100S)
Design Notes
The W6300 is available in 48 EPAD-LQFP and 48 QFN lead-free packages; the EPAD-LQFP exposed pad should be soldered to a ground plane array of vias for both thermal dissipation and low-impedance ground return for the PHY. Keep the 25 MHz crystal (or reference clock) traces short and guarded by ground, and route the magnetics pair (TX/RX differential pairs) as 100-ohm controlled impedance with length matching. Confirm the exact package dimension drawings in datasheet W6300 DS_V100E before finalizing the footprint.
Partition the board into PHY/analog and host/digital zones. Place magnetics within 25 mm of the PHY-side pins, keep Bob Smith termination (75-ohm / 1 nF network per magnetics vendor guidance) close to the RJ45, and do not run SPI or parallel bus traces under the magnetics area. Decouple each VDD pin with 100 nF ceramics placed within 2 mm, plus bulk 10 uF near the chip. Verify whether the W6300 PHY requires an external 50 MHz RMII reference or internal oscillator mode per the datasheet clock section.
The W6300's Quad SPI supports Single/Dual/Quad modes - do not assume an existing W5500 or W6100 SPI driver will work; the register map and addressing differ per WIZnet documentation, and drivers must be ported from the W6300 ioLibrary. Second, confirm interface mode strapping/pin muxing before layout, since host-interface pins are shared. Third, if Wake On LAN is used, ensure the host can respond to the wake event quickly enough to service incoming frames buffered in the W6300's internal memory to avoid overflow.
Compliance Information
WIZnet datasheet states the W6300 is available in 48 EPAD-LQFP and 48 QFN lead-free packages. Full RoHS/REACH declarations were not present in the retrieved data.
