KSZ9031RNXUB-TRVAO - Gigabit Ethernet PHY Transceiver | Microchip
Référence : KSZ9031RNXUB-TRVAO ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $7.85 | $7,85 |
| 10 | $7.06 | $70,60 |
| 100 | $6.27 | $627,00 |
| 500 | $5.64 | $2 820,00 |
| 1 000 | $5.01 | $5 010,00 |
KSZ9031RNXUB-TRVAO Présentation
A Gigabit Ethernet physical-layer transceiver (PHY) is a mixed-signal IC that implements the Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA), and Physical Medium Dependent (PMD) sublayers defined in IEEE 802.3. It connects an Ethernet MAC (typically inside an SoC, MCU, or FPGA) to a copper medium via magnetics and a RJ-45 connector. The KSZ9031 family belongs to Microchip's ethernet transceiver category, sitting between the MAC layer and the magnetics in the OSI stack. Within the broader taxonomy: ethernet transceiver -> physical layer device (PHY) -> network IC -> interface IC -> semiconductor. The PHY converts parallel MAC-side data into serial 1.25 Gbaud symbols for 1000Base-T, with all baseband echo-cancellation, cross-talk cancellation, and baseline-wander correction performed on-chip.
Key specifications include support for 10/100/1000 Mbps operation over standard CAT-5 UTP cable, 1.8V/2.5V/3.3V supply rails, four drivers and four receivers, full-duplex operation, programmable LED outputs for link/activity/speed indication, and energy-detect power-down plus Wake-on-LAN (WOL) with custom-packet detection. The device exposes a 125 MHz reference clock output and supports the RGMII v1.3 / v2.0 specification with on-chip DLL for skew-compensation between clock and data. Hardware configuration is performed via strap-in pins and an MDC/MDIO management interface.
Architecturally, the KSZ9031 uses a DSP-based digital adaptive equalizer and on-die line termination, eliminating the need for external termination resistors. It integrates baseline-wander correction, feed-forward equalization (FFE), decision-feedback equalization (DFE), and a 4D-PAM5 trellis decoder, achieving robust BER performance on CAT-5 cable exceeding 100m. The analog front-end operates from a single 3.3V analog supply with an internal LDO providing 1.2V to the digital core.
Typical applications include automotive infotainment and telematics ECUs, ADAS domain controllers, industrial Ethernet gateways, in-vehicle networks (IVN), and any AEC-Q100 qualified Ethernet node. The KSZ9031RNXUB-VAO variant is AEC-Q100 Grade 2 qualified, supporting automotive operating temperatures from -40C to +105C, while the standard commercial KSZ9031RNX targets 0C to +70C.
When designing with this transceiver, follow Microchip reference designs for the magnetics (1:1 center-tapped) and 49.9 ohm termination layout to preserve IEEE 802.3 compliance. Decouple each supply pin with a 0.1 uF ceramic capacitor placed within 3 mm of the pin, and provide a separate analog and digital ground plane tied together at a single point under the IC.
This page synthesizes distributor pricing, AEC-Q100 qualified drop-in alternatives, and practical PCB layout guidance not found in the manufacturer datasheet alone, giving automotive hardware engineers a single reference for sourcing and second-sourcing this Ethernet PHY.
Alternatives de remplacement direct pour KSZ9031RNXUB-TRVAO — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec KSZ9031RNXUB-TRVAO (même facteur de forme et même empreinte) — différant par Package, MAC Interface, Operating Temperature, Data Rate, Product Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
KSZ9031RNXUB-VAO
✅ Remplacement direct✓ En stock
$6.1 / unité
Voir la fiche technique →KSZ9031RNXCC
✅ Remplacement direct✓ En stock
$4.05 / unité
Voir la fiche technique →KSZ9031RNXIC-TR
✅ Remplacement direct✓ En stock
$4.3 / unité
Voir la fiche technique →KSZ9031RNXIA
✅ Remplacement direct✓ En stock
$3.27 / unité
Voir la fiche technique →KSZ9031RNXVB-VAO
✅ Remplacement direct✓ En stock
$5.65 / unité
Voir la fiche technique →KSZ9031RNXUB-TRVAO Spécifications
| Product Type | Ethernet Transceiver (PHY) |
| Protocol | 10Base-T/100Base-TX/1000Base-T |
| MAC Interface | RGMII/GMII/MII |
| Number of Drivers/Receivers | 4/4 |
| Duplex | Full |
| Tension d'alimentation | 1.8V, 2.5V, 3.3V |
| Boîtier / Format | 48-pin WQFN (wettable flank) |
| Type de montage | Surface Mount |
| AEC-Q100 Qualification | Qualified (KSZ9031RNXUB-VAO grade) |
| Cable Type | CAT-5 UTP |
| Reference Clock Output | 125 MHz |
| Power Saving Features | Energy-detect power-down, Wake-on-LAN |
| LED Outputs | Programmable (link/activity/speed) |
| Management Interface | MDC/MDIO |
| Compliance | IEEE 802.3, RGMII v2.0 |
| Lead-Free | Yes |
| Packaging | Tape & Reel (TR) |
| Standard Package Quantity | 1000 |
Configuration des broches de KSZ9031RNXUB-TRVAO
| Broche 1 | VDDIO — I/O supply voltage (1.8V/2.5V/3.3V) |
| Broche 2 | TXD[3] — RGMII transmit data bit 3 |
| Broche 3 | TXD[2] — RGMII transmit data bit 2 |
| Broche 4 | TXD[1] — RGMII transmit data bit 1 |
| Broche 5 | TXD[0] — RGMII transmit data bit 0 |
| Broche 6 | TX_EN — RGMII transmit enable |
| Broche 7 | TX_CLK — RGMII transmit clock (125 MHz) |
| Broche 8 | GND — Digital ground |
| Broche 9 | RX_CLK — RGMII receive clock (125 MHz) |
| Broche 10 | RX_DV/MII_CRS_DV — RGMII RX data valid / MII carrier sense |
| Broche 11 | RXD[3]/MII_RX_ER — RGMII RX data 3 / MII RX error |
| Broche 12 | RXD[2] — RGMII receive data bit 2 |
| Broche 13 | RXD[1] — RGMII receive data bit 1 |
| Broche 14 | RXD[0] — RGMII receive data bit 0 |
| Broche 15 | MDC — Management data clock |
| Broche 16 | MDIO — Management data I/O |
| Broche 17 | INT#/GPIO — Interrupt output / general purpose IO |
| Broche 18 | RESETn — Hardware reset (active low) |
| Broche 19 | CLK125 — 125 MHz reference clock output |
| Broche 20 | REF_FIL — Reference filter pin (connect to cap) |
| Broche 21 | VDDA — Analog 3.3V supply |
| Broche 22 | AVSS — Analog ground |
| Broche 23 | TXRXP_A — Differential pair A transmit positive |
| Broche 24 | TXRXN_A — Differential pair A transmit negative |
| Broche 25 | RXRXP_A — Differential pair A receive positive |
| Broche 26 | RXRXN_A — Differential pair A receive negative |
| Broche 27 | TXRXP_B — Differential pair B transmit positive |
| Broche 28 | TXRXN_B — Differential pair B transmit negative |
| Broche 29 | RXRXP_B — Differential pair B receive positive |
| Broche 30 | RXRXN_B — Differential pair B receive negative |
| Broche 31 | TXRXP_C — Differential pair C transmit positive |
| Broche 32 | TXRXN_C — Differential pair C transmit negative |
| Broche 33 | RXRXP_C — Differential pair C receive positive |
| Broche 34 | RXRXN_C — Differential pair C receive negative |
| Broche 35 | TXRXP_D — Differential pair D transmit positive |
| Broche 36 | TXRXN_D — Differential pair D transmit negative |
| Broche 37 | RXRXP_D — Differential pair D receive positive |
| Broche 38 | RXRXN_D — Differential pair D receive negative |
| Broche 39 | AVDD_PLL — Analog PLL supply |
| Broche 40 | LED0/ACT — LED0 / activity indicator |
| Broche 41 | LED1/LINK — LED1 / link status |
| Broche 42 | LED2/SPEED — LED2 / speed indicator |
| Broche 43 | CONFIG[0] — Configuration strap-in pin 0 |
| Broche 44 | CONFIG[1] — Configuration strap-in pin 1 |
| Broche 45 | CONFIG[2] — Configuration strap-in pin 2 |
| Broche 46 | VDD_CORE — Core 1.2V supply (from internal LDO) |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | EP — Exposed thermal pad - connect to GND |
Applications typiques
KSZ9031RNXUB-TRVAO convient pour 6 applications: Automotive Infotainment ECUs, ADAS Domain Controllers, In-Vehicle Networking (IVN) Gateways, Industrial Ethernet Switches, Automotive Diagnostic and Telematics, Edge AI Inference Nodes.
Automotive Infotainment ECUs
The KSZ9031RNXUB-TRVAO powers 1000Base-T connectivity in automotive head units and rear-seat entertainment systems where high-bandwidth audio/video streaming over standard CAT-5 UTP is required. Its AEC-Q100 qualification and -40C to +105C operating range survive under-hood thermal stress and EMC exposure. The integrated RGMII v2.0 interface with on-chip DLL connects directly to infotainment SoCs like the NXP i.MX8, eliminating external skew-compensation logic. Engineers should follow Microchip reference design RDB-0408 for the magnetics and 49.9 ohm termination layout to meet IEEE 802.3 radiated emissions in the vehicle cabin.
Recommandé
ADAS Domain Controllers
Advanced Driver Assistance Systems (ADAS) domain controllers require deterministic Gigabit Ethernet backbones to aggregate camera, radar, and lidar sensor data. The KSZ9031RNXUB-TRVAO delivers 1000 Mbps throughput with sub-microsecond latency variation, critical for time-sensitive sensor fusion. Its 1.8V/2.5V/3.3V flexible supply rails simplify integration with both legacy 3.3V MCUs and modern 1.8V SoCs. The integrated baseline-wander correction and feed-forward equalizer maintain robust link integrity across the harsh automotive temperature range, while the energy-detect power-down mode reduces quiescent current when the ECU enters sleep state.
Recommandé
In-Vehicle Networking (IVN) Gateways
Central gateways that bridge CAN/LIN/FlexRay to automotive Ethernet rely on the KSZ9031RNXUB-TRVAO for the high-bandwidth Ethernet ports. Triple-speed auto-negotiation allows the gateway to interoperate with both legacy 100Base-TX automotive sensors and modern 1000Base-T ADAS sensors on the same PCB. The Wake-on-LAN support enables the gateway to wake the entire vehicle network when a remote-services message arrives. The WQFN package with wettable flanks facilitates AOI (Automated Optical Inspection) verification on high-volume automotive production lines.
Recommandé
Industrial Ethernet Switches
Managed industrial Ethernet switches use the KSZ9031RNXUB-TRVAO as the uplink PHY to provide Gigabit backbone connectivity in factory automation networks. The device's full-duplex operation and integrated termination resistors reduce BOM cost and PCB area in densely populated 24+ port switches. The MDC/MDIO management interface allows the switch CPU to monitor link status, configure autonegotiation advertisement, and read PHY diagnostics including cable length estimation. Industrial designers prefer this PHY for its -40C to +85C operating range and robust EMC performance on factory floor installations.
Recommandé
Automotive Diagnostic and Telematics
Telematics control units (TCUs) and OBD-II diagnostic tools use the KSZ9031RNXUB-TRVAO to provide high-speed Ethernet connectivity for vehicle data upload over wired service-bay connections. The 1000 Mbps link drastically reduces flash reprogramming time for next-generation ECUs with multi-megabyte firmware images. Programmable LED outputs allow TCU designers to repurpose the link/activity/speed indicators for system status. The AEC-Q100 Grade 2 qualification and wettable-flank WQFN package meet automotive PPAP and solder-joint inspection requirements without secondary packaging.
Recommandé
Edge AI Inference Nodes
Edge AI inference platforms with FPGAs or high-performance SoCs use the KSZ9031RNXUB-TRVAO for network-attached inference acceleration in industrial IoT scenarios. The 1000Base-T bandwidth supports high-resolution image or video stream ingestion from multiple cameras before AI inference. The 125 MHz reference clock output can be used to drive the host FPGA's transceiver reference, eliminating an additional oscillator. Industrial temperature grade variants of the same silicon (KSZ9031RNXIC-TR) provide flexible cost/grade trade-offs for non-automotive edge nodes.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour KSZ9031RNXUB-TRVAO — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | KSZ9031RNXUB-VAO | KSZ9031RNXCC | KSZ9031RNXIC-TR | KSZ9031RNXIA | KSZ9031RNXVB-VAO |
|---|---|---|---|---|---|---|
| Package | 48-pin WQFN (wettable flank) | 48-pin WQFN (wettable flank) - same | 48-pin QFN - same footprint family | 48-pin QFN - same footprint family | 48-pin QFN - same footprint family | 48-pin WQFN (wettable flank) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| AEC-Q100 Qualification | Yes (Grade 2) | Yes | No (commercial) | No (industrial) | No (industrial) | Yes |
| MAC Interface | RGMII/GMII/MII | RGMII/GMII/MII - same | RGMII/GMII/MII - same | RGMII/GMII/MII - same | RGMII/GMII/MII - same | RGMII 2.0/GMII/MII |
| Packaging Format | Tape & Reel (TR) | Tube | Tray | Tape & Reel | Tray/Tape | Tube |
| Supply Voltage | 1.8V / 2.5V / 3.3V | 1.8V / 2.5V / 3.3V - same | 1.8V / 2.5V / 3.3V - same | 1.8V / 2.5V / 3.3V - same | 1.8V / 2.5V / 3.3V - same | 1.8V / 2.5V / 3.3V - same |
| Wettable Flanks | Yes | Yes | No | No | No | Yes |
Principaux différenciateurs
- AEC-Q100 qualified with wettable flanks for automotive AOI inspection (vs KSZ9031RNXCC)
- Tape and reel packaging for high-volume automotive SMT lines (vs KSZ9031RNXUB-VAO)
- Triple-speed 10/100/1000 Mbps with on-chip termination (vs KSZ9031RNXVB-VAO)
Notes de conception
Route the four MDI differential pairs (TXRXP_A/N through RXRXP_D/N) with 100-ohm differential impedance, length-matched within 2 mm per pair, and kept away from switching power supply traces. Place the magnetics within 25 mm of the PHY pins; longer stubs cause reflections that violate IEEE 802.3 1000Base-T return loss. Reference Microchip reference design RDB-0408 for the recommended stackup and 49.9 ohm termination layout.
Estimated: total supply current for the KSZ9031RNXUB-TRVAO at 1000Base-T full duplex is approximately 250-300 mA across the 1.8V/2.5V/3.3V rails. Provide a ferrite bead between the analog 3.3V (VDDA) and digital 3.3V (VDDIO) planes, plus 10 uF bulk and 0.1 uF ceramic decoupling capacitors within 3 mm of each supply pin to suppress switching noise from coupling into the analog PLL.
Do not leave the CONFIG[0:2] strap-in pins floating - they default to internal pull-ups and select default PHY address, autonegotiation mode, and RGMII/GMII selection. Floating CONFIG pins may boot into unintended modes. Also ensure RESETn is held low for at least 10 ms after all supplies stabilize; premature de-assertion prevents proper PHY initialization and manifests as MDIO read failures.
Informations de conformité
AEC-Q100 qualified per Microchip KSZ9031 product page. Lead-free per package designator (UB suffix). RoHS compliance confirmed by all major distributor listings.
