DP83TC811SWRNDTQ1 - Automotive 100BASE-T1 Ethernet PHY | TI
MPN: DP83TC811SWRNDTQ1 ✓ ActiveDP83TC811SWRNDTQ1 Overview
A 100BASE-T1 Ethernet PHY transceiver converts digital MAC data into electrical signaling for a single twisted pair and receives analog signals back into a digital interface. The DP83TC811S-Q1 family combines PHYTER power-saving technology with standard MII, RMII, RGMII, and SGMII MAC interfaces, giving automotive ECUs flexibility when selecting the host Ethernet controller.
Key features include 100BASE-T1 operation, IEEE 802.3bw compliance, Automotive Grade 1 qualification, xMII interface flexibility, and an integrated Diagnostic Tool Kit. The device also includes a pseudo-random binary sequence frame-generation tool compatible with internal loopbacks, allowing transmit and receive testing without an external MAC. Its wettable-flank package supports automotive manufacturing processes that inspect solder joints for defects.
The transceiver is designed for low-power automotive networks where a single pair carries 100 Mbps Ethernet data. Electrical characteristics, automotive qualification details, and the complete pin map are defined in the manufacturer data sheet. Because the DP83TC811SWRNDTQ1 targets vehicle-grade networking, designers should review EMC behavior, link diagnostics, fault handling, and interface timing against the system requirements.
Typical uses include electric-vehicle powertrain controllers, body and zonal controllers, advanced driver-assistance systems, infotainment gateways, and industrial vehicle Ethernet nodes. The wettable-flank 36-VQFN package also supports compact designs where routed differential pairs, component placement, and thermal performance must be controlled carefully.
For a new layout, place the PHY close to the connector or common-mode choke, route the differential pair as a controlled-impedance pair, and keep the diagnostic and MAC interface traces away from high-current switching nodes. Confirm that the selected MAC interface voltage, timing, and supported SGMII configuration match the system controller before releasing the schematic.
This page consolidates manufacturer device information, package details, interface capabilities, drop-in replacement candidates, and application-specific design guidance to support faster component selection and PCB planning.
Drop-in alternatives for DP83TC811SWRNDTQ1 — 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 DP83TC811SWRNDTQ1 (same form factor and footprint) — differing in Data Rate, Package, Product Type, Automotive Qualification, MAC Interface Support.
DP83TC811SWRNDRQ1
✅ Drop-InContact for price
View Datasheet →DP83TC811RWRNDTQ1
✅ Drop-In📋 Reference alternative (not in catalog)
DP83TC811RWRNDRQ1
✅ Drop-InContact for price
View Datasheet →DP83TC811SWRNDTQ1 Specifications
| Product Type | Automotive 100BASE-T1 Ethernet PHY transceiver |
| Data Rate | 100 Mbps (100BASE-T1) |
| Compliance | IEEE 802.3bw |
| Automotive Qualification | Automotive Grade 1 |
| MAC Interface Support | MII, RMII, RGMII, SGMII |
| Cable Type | Unshielded single twisted pair |
| Power Technology | PHYTER power-saving technology |
| Diagnostic Support | Diagnostic Tool Kit |
| Test Support | PRBS frame generation compatible with internal loopbacks |
| Package | 36-pin VQFN wettable flank, 6.00 mm x 6.00 mm |
| Mounting Type | Surface mount |
| Supply Voltage Options | 1.8 V, 2.5 V, 3.3 V |
| Transceiver Configuration | Full, half |
| Number of Channels | 1 channel |
| MAC Interface | xMII |
| AEC-Q100 Grade | Grade 1 |
DP83TC811SWRNDTQ1 36-pin vqfn wettable flank, 6.00 mm x 6.00 mm Pin Configuration Guide
Pin configuration for DP83TC811SWRNDTQ1 (36-pin vqfn wettable flank, 6.00 mm x 6.00 mm 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 DP83TC811SWRNDTQ1.
Refer to the datasheet for full pin configuration.
Typical Applications
DP83TC811SWRNDTQ1 is suitable for 6 applications: Electric Vehicle Powertrain Controller, Automotive Zonal Controller, ADAS Sensor Gateway, Body Control Module, Industrial Vehicle Ethernet Gateway, Automotive Ethernet Link Diagnostics.
Electric Vehicle Powertrain Controller
The DP83TC811SWRNDTQ1 fits an electric-vehicle powertrain controller that needs a compact 100 Mbps physical-layer link over an unshielded twisted pair. Its low-power PHYTER design supports energy-conscious vehicle electronics, while MII, RMII, RGMII, or SGMII connectivity allows integration with the controller chosen by the platform architecture. The 100BASE-T1 interface reduces cable count compared with multi-pair Ethernet, while the Diagnostic Tool Kit and PRBS loopback capability support production test and fault investigation. Verify the exact MAC timing, link budget, EMC requirements, and operating-temperature grade against the vehicle program before releasing the board.
Recommended
Automotive Zonal Controller
The DP83TC811SWRNDTQ1 is appropriate for a zonal controller consolidating vehicle functions over 100BASE-T1 links. Its single-channel, low-power PHY architecture addresses one twisted pair per Ethernet endpoint, and xMII flexibility allows selection of an MII, RMII, RGMII, or SGMII host interface. The integrated diagnostics help commissioning teams distinguish link, cabling, and controller-side problems. In a zonal design, keep the PHY close to the external connector and common-mode filtering, maintain controlled differential routing, and confirm that the MAC interface supports the required link rate and timing.
Recommended
ADAS Sensor Gateway
The DP83TC811SWRNDTQ1 can serve as the 100BASE-T1 network interface in an ADAS sensor gateway that aggregates data from cameras, radar, or environmental sensors before forwarding it to a higher-speed vehicle Ethernet backbone. Low-power operation is valuable in peripheral sensing nodes with limited thermal budgets, while the choice of MII, RMII, RGMII, or SGMII interfaces provides flexibility for different gateway processors. The PRBS generator and internal loopbacks aid signal-path validation during integration. Final selection requires review of EMI behavior, cable length, MAC timing, and diagnostic coverage for the particular sensor topology.
Recommended
Body Control Module
The DP83TC811SWRNDTQ1 supports body-control networking where a controller requires a dedicated 100BASE-T1 port for gateway, switch, or remote-module communication. Its low-power design is useful where the module has a constrained thermal envelope, and the 36-pin VQFN wettable-flank package supports inspection of solder joints during automotive manufacturing. Diagnostic functions reduce commissioning effort by exposing link status and supporting repeatable test patterns. The layout should separate the Ethernet pair from actuator drive stages, use the application guidance for magnetics or filtering, and confirm the MCU interface voltage before component commitment.
Recommended
Industrial Vehicle Ethernet Gateway
The DP83TC811SWRNDTQ1 is suitable for industrial vehicle gateways that connect 100BASE-T1 equipment to a higher-speed in-vehicle Ethernet network. The selectable MII, RMII, RGMII, and SGMII interfaces simplify adaptation to different gateway processors, while the low-power 100BASE-T1 interface targets cable-count-conscious vehicle networks. Built-in diagnostics and PRBS-based loopbacks improve board bring-up and production troubleshooting. For a mixed commercial-vehicle platform, review EMC performance, temperature range, cable fault handling, and the connector or common-mode-choke implementation specified in the system reference design.
Recommended
Automotive Ethernet Link Diagnostics
The DP83TC811SWRNDTQ1 can be used in a diagnostic fixture or service interface designed to test 100BASE-T1 physical-layer links. Its Diagnostic Tool Kit and pseudo-random binary sequence frame generator work with internal loopbacks, allowing engineers to transmit and receive patterned data without relying on a conventional external MAC during specific bench procedures. This capability supports cable, magnetics, connector, and PHY troubleshooting in vehicle networks. Use the manufacturer diagnostic procedure to define instrumentation, stimulus, pass criteria, and fault interpretation. The fixture should provide the required interface levels and controlled termination to avoid producing misleading link results.
Recommended
Recommended Products Summary
Engineering reference data for DP83TC811SWRNDTQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DP83TC811SWRNDRQ1 | DP83TC811RWRNDTQ1 | DP83TC811RWRNDRQ1 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 36-VQFN (6x6), wettable flank | 36-VQFN (6x6) | 36-VQFN (6x6), wettable flank | 36-VQFN (6x6) |
| Ethernet Standard | IEEE 802.3bw | IEEE 802.3bw | IEEE 802.3bw | IEEE 802.3bw |
| Data Rate | 100 Mbps (100BASE-T1) | 100 Mbps (100BASE-T1) | 100 Mbps (100BASE-T1) | 100 Mbps (100BASE-T1) |
| Automotive Qualification | Automotive Grade 1 | Automotive Grade 1 | Automotive Grade 1 | Automotive Grade 1 |
| MAC Interface Support | MII, RMII, RGMII, SGMII | MII, RMII, RGMII, SGMII | MII, RMII, RGMII, SGMII | MII, RMII, RGMII, SGMII |
| Diagnostic Tool Kit | Yes | Yes | Yes | Yes |
| PRBS Frame Generation | Yes, compatible with internal loopbacks | Yes, compatible with internal loopbacks | Yes, compatible with internal loopbacks | Yes, compatible with internal loopbacks |
Key Differentiators
- Broad MAC-interface selection within one 100BASE-T1 PHY (vs DP83TC811SWRNDRQ1)
- Automotive-focused link management (vs DP83TC811RWRNDTQ1)
- Production-test support without a conventional MAC pattern (vs DP83TC811RWRNDRQ1)
- Automotive assembly inspection support (vs DP83TC811SWRNDRQ1)
Design Notes
Place the DP83TC811SWRNDTQ1 close to the Ethernet connector or common-mode filtering network, and route the 100BASE-T1 pair as a controlled-impedance differential pair. Keep the pair continuous, avoid test-point stubs where possible, and separate it from switching nodes and high-current return paths. Use the manufacturer application guidance to determine the required external magnetics, common-mode choke, and termination arrangement.
The manufacturer lists 1.8 V, 2.5 V, and 3.3 V supply options for this PHY family, but the exact rail requirements for every operating mode are defined in the data sheet. Decouple each supply pin according to the recommended application circuit, including high-frequency ceramic capacitance close to the device. Verify the selected MAC interface voltage before connecting logic signals, since an incorrect host-interface supply can damage the PHY or controller.
Do not treat R and S order codes as interchangeable without checking reel orientation and the assembler tape-and-reel convention. The DP83TC811SWRNDRQ1 and DP83TC811RWRNDRQ1 candidates show equivalent primary performance, but their order-code suffixes encode procurement details. Before substituting a part, compare the manufacturer ordering table, terminal numbering, package drawing, and production labeling requirements.
Use the PRBS generation and internal-loopback functions as part of board bring-up, but establish the test conditions and pass criteria from the manufacturer diagnostic procedure. Confirm the external cable, connector, filtering, and termination arrangement before interpreting a link failure. Pattern-based testing can expose signal-integrity or configuration problems more consistently than basic link-up checks alone.
The wettable-flank VQFN package is designed for automotive assembly inspection, but its thermal performance still depends on the PCB copper and surrounding component placement. Follow the manufacturer land-pattern and thermal-layout guidance, avoid placing heat sources directly beneath the exposed area, and evaluate junction temperature under worst-case network activity. Automotive operating-temperature requirements should be confirmed from the exact orderable-device documentation.
Compliance Information
The device is identified by Texas Instruments as Automotive Grade 1 and IEEE 802.3bw compliant. Detailed RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations must be confirmed on the exact manufacturer product page before release.
