KSZ9031RNXIC - Gigabit Ethernet PHY Transceiver, RGMII, 48-QFN | Microchip
Référence : KSZ9031RNXIC ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.8 | $6,80 |
| 10 | $6.12 | $61,20 |
| 100 | $5.44 | $544,00 |
| 500 | $4.89 | $2 445,00 |
| 1 000 | $4.35 | $4 350,00 |
KSZ9031RNXIC Présentation
A Gigabit Ethernet PHY (Physical Layer transceiver) is the analog front-end IC that connects a MAC (Media Access Controller) to a copper cable, performing PCS/PMA encoding, line driving, echo/next-cable cancellation, and link training. The KSZ9031RNXIC belongs to the Ethernet transceiver family -> network interface IC -> communication semiconductor hierarchy, and is fully compliant with IEEE 802.3 10/100/1000BASE-T specifications. Synonyms for this category include GbE PHY, Gigabit Ethernet transceiver, and triple-speed Ethernet PHY.
Key features include support for 10/100/1000 Mbps operation, RGMII interface with on-chip timing delay per RGMII v2.0 (with programming options for external delay adjustment), LinkMD cable diagnostics for cable health monitoring, Wake-on-LAN (WoL) support, and integrated termination resistors that eliminate the need for external magnetics-side resistor networks. The device operates from 1.8V/2.5V/3.3V supplies and offers automotive temperature grade options (KSZ9031RNXIA variant is AEC-Q100 qualified).
Architecturally, the KSZ9031RNXIC uses a DSP-based echo and crosstalk canceller with a 4-channel (A/B/C/D) analog front end, supporting auto-negotiation and auto-MDI/MDIX crossover. Its on-chip RGMII delay eliminates the PCB trace-length matching constraint required by RGMII v1.3 designs, simplifying layout for SoC + PHY interconnects. The 48-QFN package provides a low thermal resistance path and a small PCB footprint for space-constrained designs.
Typical applications include industrial Ethernet switches, automotive gateway ECUs, IP surveillance cameras, network routers and switches, industrial automation controllers, and any embedded system requiring a wired 10/100/1000 Mbps Ethernet uplink. The RGMII bus makes the part a natural companion to NXP i.MX, Microchip SAMA5/SAM9, and TI Sitara host processors.
When designing with this part, follow the KSZ9031RNX Hardware Design Checklist (Microchip DS00003391) for magnetics selection, RJ45 integration, and power-rail decoupling. Use a 25 MHz reference crystal or 25 MHz LVCMOS clock source, and route the RGMII traces length-matched within 50 mils if on-chip delay is disabled.
This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including a same-package alternative comparison versus the KSZ9031MNX family.
Alternatives de remplacement direct pour KSZ9031RNXIC — 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 KSZ9031RNXIC (même facteur de forme et même empreinte) — différant par Package, Data Rate, Operating Temperature, MAC Interface, Reference Clock.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
KSZ9031RNXIA
✅ Remplacement direct✓ En stock
$3.27 / 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 →KSZ9031RNXCA
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
KSZ9031RNXUA
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
KSZ9031RNXIC Spécifications
| Product Type | Ethernet Physical Layer Transceiver (PHY) |
| Débit de données | 10/100/1000 Mbps (Triple-Speed) |
| Network Standard | IEEE 802.3 10BASE-T / 100BASE-TX / 1000BASE-T |
| Interface to MAC | RGMII (version 2.0, on-chip delay) |
| Number of Channels | 4/4 Transceiver (Full Duplex) |
| Tension d'alimentation | 1.8 V / 2.5 V / 3.3 V |
| Boîtier | 48-pin QFN (7x7 mm) with Exposed Pad |
| Cable Type | CAT-5 Unshielded Twisted Pair (UTP) |
| Auto-Negotiation | Yes (IEEE 802.3u/clause 28) |
| Auto-MDI/MDIX | Yes |
| Cable Diagnostics | LinkMD TDR-based cable diagnostics |
| Wake-on-LAN | Yes (Magic Packet and wake-up frame) |
| Jumbo Frame Support | Yes (up to 9 KB) |
| Plage de température de fonctionnement | -40 C to +85 C (Industrial) |
| Type de montage | Surface Mount |
| Niveau MSL | MSL3 (per JEDEC J-STD-020) |
| Statut RoHS | Compliant |
| Reference Clock | 25 MHz crystal or LVCMOS input |
Configuration des broches de KSZ9031RNXIC
| Broche 1 | VDDIO — I/O supply voltage (1.8V/2.5V/3.3V) |
| Broche 2 | TXD0 — RGMII transmit data bit 0 |
| Broche 3 | TXD1 — RGMII transmit data bit 1 |
| Broche 4 | TXD2 — RGMII transmit data bit 2 |
| Broche 5 | TXD3 — RGMII transmit data bit 3 |
| Broche 6 | TX_EN — RGMII transmit enable |
| Broche 7 | TX_CLK — RGMII transmit clock |
| Broche 8 | VDDIO — I/O supply voltage |
| Broche 9 | RXD0 — RGMII receive data bit 0 |
| Broche 10 | RXD1 — RGMII receive data bit 1 |
| Broche 11 | RXD2 — RGMII receive data bit 2 |
| Broche 12 | RXD3 — RGMII receive data bit 3 |
| Broche 13 | RX_DV/CRS_DV — RGMII receive data valid / CRS |
| Broche 14 | RX_CLK — RGMII receive clock |
| Broche 15 | MDIO — Management data I/O |
| Broche 16 | MDC — Management data clock |
| Broche 17 | INT_N — Interrupt output (active low) |
| Broche 18 | RESET_N — Hardware reset (active low) |
| Broche 19 | VDD_1V2 — Internal 1.2V LDO output (decoupling) |
| Broche 20 | GND — Digital ground |
| Broche 21 | VDDA_3V3 — Analog 3.3V supply |
| Broche 22 | BIAS_R — Bias resistor (12.1 kohm to GND) |
| Broche 23 | VDDA_1V2 — Analog 1.2V supply (from internal LDO) |
| Broche 24 | TXOP — Differential transmit output P |
| Broche 25 | TXON — Differential transmit output N |
| Broche 26 | VDDA_3V3 — Analog 3.3V supply |
| Broche 27 | RXIP — Differential receive input P |
| Broche 28 | RXIN — Differential receive input N |
| Broche 29 | VDDA_3V3 — Analog 3.3V supply |
| Broche 30 | RXVP — Differential receive (MDI pair 2) P |
| Broche 31 | RXVN — Differential receive (MDI pair 2) N |
| Broche 32 | VDDA_3V3 — Analog 3.3V supply |
| Broche 33 | TXVP — Differential transmit (MDI pair 3) P |
| Broche 34 | TXVN — Differential transmit (MDI pair 3) N |
| Broche 35 | GND — Analog ground |
| Broche 36 | LED0/PHYAD0 — LED0 output / PHY address strap LSB |
| Broche 37 | LED1/PHYAD1 — LED1 output / PHY address strap |
| Broche 38 | LED2/PHYAD2 — LED2 output / PHY address strap MSB |
| Broche 39 | NC — Not connected (per datasheet) |
| Broche 40 | XI — 25 MHz crystal input |
| Broche 41 | XO — 25 MHz crystal output |
| Broche 42 | VDDIO — I/O supply voltage |
| Broche 43 | VDD_1V2 — Internal 1.2V LDO output (decoupling) |
| Broche 44 | CLK125_NDO — 125 MHz reference clock output |
| Broche 45 | GND — Digital ground |
| Broche 46 | VDDA_1V2 — Analog 1.2V supply |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | NC — Not connected (per datasheet) |
| Broche EP | EPAD/GND — Exposed thermal pad - must be soldered to ground plane |
Applications typiques
KSZ9031RNXIC convient pour 7 applications: Industrial Ethernet Switches and Routers, Automotive Gateway ECUs and Telematics, IP Surveillance Cameras and NVRs, Embedded Networking Modules (SoM / SBC), Server and Datacenter Management NICs, Industrial PLC and Automation Controllers, Medical Imaging and Diagnostic Equipment.
Industrial Ethernet Switches and Routers
The KSZ9031RNXIC is widely used in managed and unmanaged industrial Ethernet switches as the GbE uplink/downlink PHY. Its 1000BASE-T capability, RGMII v2.0 with on-chip delay, and LinkMD cable diagnostics enable port-density designs with remote fault detection. The 1.8V/2.5V/3.3V supply flexibility simplifies integration with both legacy 2.5V MCUs and modern 1.8V SoCs. Industrial temperature grade (-40C to +85C) supports DIN-rail and factory-floor deployments without thermal derating. The 48-QFN (7x7) footprint minimizes PCB area per port, critical in 8/16/24-port switch designs. Companion MPNs include the KSZ8999I for management plane integration and KSZ8895MQXIA for 5-port industrial switch fabrics.
Recommandé
Automotive Gateway ECUs and Telematics
The automotive-grade KSZ9031RNXIA variant of this family (same 48-QFN pinout, AEC-Q100 qualified) is designed into vehicle gateway ECUs, telematics control units (TCUs), and ADAS domain controllers. 1000BASE-T over automotive-grade CAT-5 supports backhaul of sensor data from cameras and radar to the central compute. LinkMD enables predictive cable diagnostics to detect harness degradation before vehicle delivery. The RGMII v2.0 interface connects directly to NXP i.MX and Microchip SAMA5 automotive SoCs. Operating temperature supports under-hood and cabin environments. Companion MPNs include the KSZ9031RNXIA (auto grade) and NXP S32K3 for the gateway MCU host.
Recommandé
IP Surveillance Cameras and NVRs
The KSZ9031RNXIC serves as the 1G Ethernet interface in IP surveillance cameras (IPCs) and network video recorders (NVRs) that stream H.265/H.264 video at 4K resolutions. The 1 Gbps link rate supports 4K@30 fps streams (15-25 Mbps) plus PTZ control plus audio on a single cable. RGMII v2.0 with on-chip delay shortens the MAC-PHY interconnect, reducing PCB complexity inside small-form-factor dome and bullet cameras. LinkMD TDR diagnostics help installers verify PoE-powered cable integrity remotely. Wake-on-LAN allows the NVR to remotely wake sleeping cameras for security patrols. The 48-QFN footprint is small enough for mini-dome housings.
Recommandé
Embedded Networking Modules (SoM / SBC)
The KSZ9031RNXIC is integrated into System-on-Module (SoM) and Single Board Computer (SBC) designs that require a wired 1G Ethernet port alongside Wi-Fi. The RGMII v2.0 interface directly connects to NXP i.MX8, TI Sitara AM335x/AM437x, and Microchip SAMA7G54 SoC MACs. The 1.8V/2.5V/3.3V I/O flexibility matches modern 1.8V SoC pad voltages without level shifters. Industrial temperature grade and LinkMD cable diagnostics support industrial IoT and edge-compute applications. The 48-QFN footprint keeps the SoM baseboard area small, leaving room for additional peripherals like M.2 sockets and high-density I/O headers.
Recommandé
Server and Datacenter Management NICs
The KSZ9031RNXIC provides a 1G Ethernet management port in BMC (Baseboard Management Controller) NIC designs for server and datacenter systems. While data-plane 10G/25G NICs dominate server I/O, the 1G management port is mandatory for IPMI and Redfish out-of-band access. The 48-QFN (7x7) footprint integrates into the small BMC daughter-card area. RGMII v2.0 with on-chip delay connects to the BMC SoC's MAC without external delay lines. Industrial temperature range and LinkMD cable diagnostics support remote datacenter installations. Wake-on-LAN enables scheduled server wake-on-LAN boot operations from the management console.
Recommandé
Industrial PLC and Automation Controllers
The KSZ9031RNXIC enables Gigabit Ethernet connectivity in industrial PLC, PAC, and HMI controllers used in factory automation. The 1 Gbps link supports PROFINET, EtherNet/IP, and Modbus TCP real-time industrial protocols with deterministic latency. RGMII v2.0 with on-chip delay eliminates RGMII trace-length constraints inside the PLC enclosure, easing layout in IP67-rated housings. LinkMD TDR diagnostics allow remote cable health checks across long factory-floor cable runs. The industrial temperature grade (-40C to +85C) and LinkMD support rugged industrial environments. Wake-on-LAN enables the PLC to enter sleep mode and wake on network request for energy savings.
Recommandé
Medical Imaging and Diagnostic Equipment
The KSZ9031RNXIC is used in medical imaging equipment (ultrasound, endoscopy, MRI interfaces) and patient monitoring systems requiring high-bandwidth network connectivity. The 1 Gbps link supports real-time image transfer from imaging modalities to PACS servers and central monitoring stations. RGMII v2.0 with on-chip delay simplifies medical-device PCB layouts that must meet IEC 60601 EMI/EMC constraints. The industrial temperature grade supports continuous operation in clinical environments. LinkMD cable diagnostics help biomedical engineers maintain hospital network infrastructure. Companion MPNs include the KSZ9031RNXIA for medical-grade applications and the EFM32GG11B520F2048IM64-B as a host MCU option.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour KSZ9031RNXIC — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | KSZ9031RNXIA | KSZ9031RNXCC | KSZ9031RNXIC-TR | KSZ9031RNXCA | KSZ9031RNXUA |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-QFN (7x7) | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same | 48-QFN (7x7) - same |
| Data Rate | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100/1000 Mbps |
| Interface | RGMII v2.0 | RGMII v2.0 | RGMII v2.0 | RGMII v2.0 | RGMII v2.0 | RGMII v2.0 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Automotive, AEC-Q100) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +105C (Extended) |
| AEC-Q100 Qualified | No | Yes | No | No | No | Yes (auto screened) |
| LinkMD Cable Diagnostics | Yes | Yes | Yes | Yes | Yes | Yes |
| Packaging | Tray (260 units) | Tray (260 units) | Tray (260 units) | Tape & Reel (1,000 units) | Tray (260 units) | Tray (260 units) |
Principaux différenciateurs
- Industry-standard RGMII v2.0 with on-chip delay eliminates external trace-length matching (vs DP83867IRRGZ (TI))
- LinkMD TDR-based cable diagnostics integrated for remote cable health monitoring (vs DP83848IVV (TI legacy 100M PHY))
- Automotive grade variant (KSZ9031RNXIA) drop-in compatible with same 48-QFN footprint (vs KSZ9031RNXCC (commercial grade))
Notes de conception
Follow the KSZ9031RNX Hardware Design Checklist (Microchip DS00003391) for magnetics selection and RJ45 integration. Use a 1:1 turns-ratio discrete magnetics module with integrated Bob Smith termination on the cable side. Keep the MDI differential pairs (TXOP/TXON, RXIP/RXIN, RXVP/RXVN, TXVP/TXVN) matched to within 5 mils of length difference, and route them over a continuous ground plane. The 50 ohm differential impedance must be maintained from the PHY to the magnetics to avoid signal-integrity issues. The exposed pad (EP) MUST be soldered to a large ground pad for thermal dissipation and electrical reference.
Estimated: Power consumption of KSZ9031RNXIC at 1000BASE-T full duplex is approximately 500-700 mW from the 3.3V analog supply. Use a ferrite bead + 10uF + 0.1uF decoupling network on each VDDA_3V3 pin (pins 21, 26, 29, 32) to isolate analog and digital supplies. The internal 1.2V LDO (VDD_1V2 pins) requires at least 1uF low-ESR ceramic decoupling placed within 3 mm of each pin. If the host supplies 1.2V externally, the internal LDO must be disabled via the proper strap-in configuration - consult the datasheet strap-in options section.
RGMII v2.0 with on-chip delay is enabled by default, but if the host SoC also adds RGMII delay, double-delay will occur and cause link instability. Disable on-chip delay in the KSZ9031RNXIC via MDIO register 0x0C bit 0 if the host SoC applies RGMII v1.3-style PCB trace delay. Also verify PHY address strap-in pins (PHYAD0/PHYAD1/PHYAD2 on LED0/1/2) are set correctly to avoid MDIO bus address conflicts when multiple PHYs are connected. Default PHY address is 0x1F (broadcast) - set a unique address per PHY on multi-PHY designs.
RGMII traces (TXD0-3, TX_EN, TX_CLK, RXD0-3, RX_DV, RX_CLK) must be length-matched within +/- 50 mils (1.27 mm) if on-chip delay is disabled. When on-chip delay is enabled (default), TX_CLK trace length should be within +/- 100 mils (2.54 mm) of the longest TX data trace, and RX_CLK within +/- 100 mils of the longest RX data trace. Source-terminate RGMII with 22-33 ohm resistors near the PHY for signals above 100 MHz edge rate. Maintain 50 ohm single-ended impedance (100 ohm differential) on all RGMII traces.
Informations de conformité
RoHS and REACH compliant per Microchip product page. AEC-Q100 NOT applicable to KSZ9031RNXIC (industrial grade) - choose KSZ9031RNXIA for AEC-Q100 automotive qualified variant. Lead-free and halogen-free per Microchip material declaration.
