KSZ9031RNXVB-VAO - Gigabit Ethernet RGMII Transceiver AEC-Q100 | Microchip
MPN: KSZ9031RNXVB-VAO ✓ Hoạt độngKSZ9031RNXVB-VAO Tóm tắt
A Gigabit Ethernet transceiver is a physical-layer device that connects a MAC (Media Access Controller) to the copper medium via twisted-pair magnetics, encoding/decoding 1000BASE-T/100BASE-TX/10BASE-T signaling and providing PCS, PMA, and PHY functions defined by IEEE 802.3 clauses 22-40. The KSZ9031 family belongs to the Ethernet PHY hierarchy (Ethernet transceiver -> physical layer device -> network interface IC) and supports GMII/MII or RGMII MAC-side interfaces depending on sub-variant, sitting between the SoC MAC and the RJ45/Magnetics front-end.
Key features include 3.3V/2.5V/1.8V tolerant MAC-side I/Os, on-chip termination resistors, AEC-Q100 Grade 2 qualification (-40C to +105C), Energy-Efficient Ethernet (EEE) support per IEEE 802.3az, Wake-on-LAN, auto-negotiation with HP Auto-MDIX, and remote/local loopback for diagnostic verification of both analog and digital data paths. The WQFN wettable-flank package enables automated optical inspection (AOI) of solder joints - critical for automotive PCB assembly.
Architecturally, the device integrates a DSP-based baseband processor, a low-noise analog front-end with on-chip LDO regulators, and an RGMII interface block that supports RGMII-ID (internal delay on TX, RX, or both). It interfaces directly to a single 3.3V supply (with internal regulation generating 1.2V core rails), reducing external BOM. Typical power consumption is approximately 450 mW active at 1 Gbps and 80 mW in EEE LPI state.
Typical applications include automotive infotainment Ethernet, ADAS camera links, in-vehicle networking backbones, industrial Ethernet switches, and any design requiring a 1 Gbps RGMII PHY qualified for harsh environments. Compared to consumer-grade KSZ9031RNX (standard QFN-48), the -VAO part uses wettable-flank leads for solder joint inspection.
When designing in, route the 125 MHz RGMII clock and data signals with matched impedance (typically 50 ohm SE) and length-matching to within the RGMII v2.0 spec (typically 50 mil tolerance on the PCB). Use a 25 MHz external crystal or 125 MHz LVCMOS reference; configure strap pins or MDIO registers for desired clock delay mode.
This page synthesizes distributor pricing, drop-in alternatives from the same KSZ9031 family and across brands, and practical PCB layout notes not always summarized in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho KSZ9031RNXVB-VAO — 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 KSZ9031RNXVB-VAO (cùng hình factor và footprint) — khác nhau ở Package, Cable Type, Product Type, Data Rate, MAC Interface.
KSZ9031RNXUB-VAO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →KSZ9031RNXVC-VAO
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
KSZ9031RNXVB-VAO-TR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
KSZ9031RNXCC
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →KSZ9031RNXIC
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →RTL8211F-CG
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
KSZ9031RNXVB-VAO Thông số kỹ thuật
| Product Type | Ethernet Transceiver (PHY) |
| Tốc độ dữ liệu | 10/100/1000 Mbps |
| Standards Compliance | IEEE 802.3 10BASE-T, 100BASE-TX, 1000BASE-T |
| MAC-Side Interface | RGMII (Version 2.0 compliant, on-chip delay) |
| Điện áp cung cấp | 3.3 V (single supply; internal LDO for core) |
| MAC I/O Voltage Tolerance | 3.3 V / 2.5 V / 1.8 V |
| Hộp | 48-pin WQFN (wettable-flank) |
| Nhiệt độ hoạt động | -40C to +105C (AEC-Q100 Grade 2) |
| Automotive Qualification | AEC-Q100 qualified (VAO suffix) |
| Energy-Efficient Ethernet | IEEE 802.3az supported |
| Auto-Negotiation | Yes (with HP Auto-MDIX) |
| Wake-on-LAN | Supported |
| Loopback Modes | Remote and local loopback |
| Reference Clock | 25 MHz crystal or 125 MHz LVCMOS reference |
| Typical Active Power | 450 mW at 1 Gbps |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Yes (lead-free) |
Hướng dẫn cấu hình chân KSZ9031RNXVB-VAO 48-pin wqfn (wettable-flank)
Cấu hình chân cho KSZ9031RNXVB-VAO (48-pin wqfn (wettable-flank) gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho KSZ9031RNXVB-VAO.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
KSZ9031RNXVB-VAO phù hợp cho 6 Áp dụngs: Automotive Infotainment Ethernet Backbone, ADAS Camera Ethernet Links, Industrial Gigabit Ethernet Switches, In-Vehicle Networking Gateway, Automotive Telematics and V2X Modems, Harsh-Environment IoT Edge Gateways.
Automotive Infotainment Ethernet Backbone
The KSZ9031RNXVB-VAO is engineered for automotive infotainment networks where it serves as the physical-layer interface between the head-unit SoC MAC and the vehicle's Ethernet backbone. Its 1000BASE-T capability supports high-bandwidth audio/video streams and dual-display infotainment traffic, while RGMII v2.0 with on-chip delay eliminates PCB delay lines and reduces layout complexity. AEC-Q100 Grade 2 qualification and -40C to +105C operation handle under-dash thermal stress, and the wettable-flank WQFN package enables automated optical inspection of solder joints on the high-vibration automotive PCB. Typical active power of 450 mW at 1 Gbps is acceptable for head-unit thermal budgets.
Được đề xuất
ADAS Camera Ethernet Links
In advanced driver-assistance systems (ADAS), the KSZ9031RNXVB-VAO provides the 1 Gbps physical link between surround-view, front-camera, and rear-camera serializers and the central ADAS ECU. Its full-duplex 1000BASE-T operation handles uncompressed 2 MP-8 MP camera payloads, while the RGMII v2.0 interface integrates seamlessly with automotive SoCs such as NXP S32 and Renesas R-Car. AEC-Q100 Grade 2 qualification is essential for under-hood and behind-bumper mounting, where temperatures regularly exceed 85C. The on-chip HP Auto-MDIX eliminates crossover-cable concerns during service.
Được đề xuất
Industrial Gigabit Ethernet Switches
The KSZ9031RNXVB-VAO serves as the uplink or stacking PHY in industrial managed Ethernet switches, providing a robust 1 Gbps copper port with extended-temperature operation. Its 3.3V/2.5V/1.8V tolerant MAC I/Os simplify interfacing to industrial switch ASICs and FPGAs across multiple voltage domains. Energy-Efficient Ethernet (IEEE 802.3az) reduces power consumption by ~80% during idle periods - critical for fanless industrial enclosures. Wake-on-LAN enables remote management of distributed I/O nodes across factory floors.
Được đề xuất
In-Vehicle Networking Gateway
The KSZ9031RNXVB-VAO functions as a port PHY on central gateways that bridge automotive Ethernet to CAN, LIN, and FlexRay networks. Its AEC-Q100 Grade 2 qualification and wettable-flank WQFN package meet the reliability and inspectability requirements of central gateway PCBs. RGMII v2.0 with on-chip delay simplifies timing closure against the gateway SoC MAC, while on-chip termination resistors reduce external BOM count. Diagnostic loopback modes support production-line PHY testing without external equipment.
Được đề xuất
Automotive Telematics and V2X Modems
The KSZ9031RNXVB-VAO provides the wired Ethernet backhaul for telematics control units and V2X (vehicle-to-everything) modems that require a reliable, automotive-qualified PHY. Its extended -40C to +105C operating range covers under-dash and roof-mounted telematics locations, and the wettable-flank package supports high-reliability solder joints required for vibration-prone chassis mounting. RGMII v2.0 interface enables direct connection to cellular modem SoCs without external delay tuning, reducing BOM and PCB area in space-constrained TCU housings.
Được đề xuất
Harsh-Environment IoT Edge Gateways
The KSZ9031RNXVB-VAO is well suited for ruggedized IoT edge gateways deployed in outdoor enclosures, factory floors, and railway signaling where temperature swings exceed commercial-grade limits. Its AEC-Q100 Grade 2 qualification, -40C to +105C operation, and wettable-flank package provide margin beyond typical industrial -40C to +85C requirements. The integrated HP Auto-MDIX and Energy-Efficient Ethernet features simplify field installation and reduce operational power in remote, solar-powered deployments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho KSZ9031RNXVB-VAO — 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 | KSZ9031RNXUB-VAO | KSZ9031RNXVC-VAO | KSZ9031RNXCC | KSZ9031RNXIC | RTL8211F-CG |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Realtek |
| Package | 48-pin WQFN (wettable-flank) | 48-pin WQFN (wettable-flank) - same | 48-pin WQFN (wettable-flank) - same | 48-pin QFN - same footprint, no wettable flanks | 48-pin QFN - same footprint | 48-pin QFN - same footprint, no wettable flanks |
| MAC Interface | RGMII v2.0 (on-chip delay) | RGMII v2.0 (on-chip delay) | RGMII v2.0 (on-chip delay) | RGMII v2.0 (on-chip delay) | GMII/MII - NOT RGMII | RGMII (external delay typically required) |
| Automotive Grade (AEC-Q100) | Yes (Grade 2) | Yes (Grade 2) | Yes (Grade 2) | No (commercial) | No (commercial) | Yes (AEC-Q100) |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C (AEC-Q100 variant) |
| Wettable-Flank Leads | Yes | Yes | Yes | No | No | No |
| Energy-Efficient Ethernet (IEEE 802.3az) | Yes | Yes | Yes | Yes | Yes | Yes |
| Typical Active Power (1 Gbps) | ~450 mW | ~450 mW | ~430 mW | ~450 mW | ~450 mW | ~400 mW |
| Source | web_data | web_data | web_data | web_data | web_data | web_data |
Bảo phân biệt quan trọng
- AEC-Q100 Grade 2 qualification with wettable-flank WQFN package (vsKSZ9031RNXCC)
- Native RGMII v2.0 on-chip TX/RX delay with programming options (vsRTL8211F-CG)
- Newer silicon revision with improved power and EEE performance (vsKSZ9031RNXUB-VAO)
Ghi chú thiết kế
Route the 125 MHz RGMII clock and the four-bit TX/RX data groups with controlled impedance (50 ohm SE typical) and length-match to within the RGMII v2.0 specification (typically 50 mil tolerance). The on-chip delay option of the VB variant can compensate for moderate PCB skew, but excessive mismatch still risks link errors. Keep the MDI differential pairs (TRD0+/- through TRD3+/- as defined in the datasheet) tightly coupled and length-matched to meet 1000BASE-T return-loss requirements.
Place the KSZ9031RNXVB-VAO's decoupling capacitors (typically 0.1 uF and 10 uF bulk) within 100 mil of the 3.3V supply pins. The exposed thermal pad (EP) of the 48-pin WQFN MUST be soldered to a contiguous ground plane with thermal vias (typically 9-13 vias in a 3x3 or 4x4 grid) for heat dissipation and low-inductance ground return. For automotive designs, ensure the wettable flanks are visible at the package edges to support AOI inspection.
Estimate: at 1 Gbps, total link budget must absorb roughly 14 dB insertion loss from PCB traces, connectors, and 100 m of Cat5e cable. Use a center-tap configuration on the Ethernet magnetics with the PHY's integrated biasing; verify magnetics selection meets IEEE 802.3 isolation and return-loss specs. For MDI return-loss compliance above 30 MHz, consider a common-mode choke and ESD protection array (e.g., integrated RJ45 with magnetics) at the connector.
Do NOT substitute the commercial-grade KSZ9031RNX for the -VAO in AEC-Q100 designs - the commercial part lacks automotive qualification and uses a non-wettable QFN. Verify strap-pin configuration (LED, MODE, REF_CLK selection) against the datasheet before PCB layout, because strap pin states are sampled at reset and incorrect settings can prevent link-up. Always source the 25 MHz crystal or 125 MHz reference from a low-jitter, automotive-grade supplier, since reference-clock phase noise directly degrades MDI transmit performance.
Estimate: at 1 Gbps active and 3.3V supply, the KSZ9031RNXVB-VAO draws approximately 136 mA (450 mW / 3.3V). In Energy-Efficient Ethernet (IEEE 802.3az) LPI state, current drops to roughly 25 mA. The internal LDO regulators generate the 1.2V core rail from the 3.3V supply - no external 1.2V rail is required, simplifying power architecture. For power-budget analysis in head-unit designs, include a 20% margin for transient link-up bursts.
Thông tin tuân thủ
AEC-Q100 Grade 2 automotive qualified per Microchip product page. RoHS and REACH compliant per third-party distributor data (etei.com). Lead-free and conflict-minerals-compliant per Microchip standard policy. Halogen-free status not specified in verified web data.
