KSZ9893RNXI - 3-Port Gigabit Ethernet Switch, 64-VQFN | Microchip
Référence : KSZ9893RNXI ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $12.85 | $12,85 |
| 10 | $11.95 | $119,50 |
| 100 | $10.45 | $1 045,00 |
| 500 | $9.2 | $4 600,00 |
| 1 000 | $8.1 | $8 100,00 |
KSZ9893RNXI Présentation
What is a managed Layer-2 Ethernet switch IC? In the silicon taxonomy, a managed Ethernet switch sits between a simple PHY (physical-layer transceiver) and a full network processor. It performs MAC-layer forwarding, VLAN tagging, IGMP snooping, QoS prioritization, and traffic shaping autonomously, exposing configuration registers to a host CPU rather than running an external networking stack. The KSZ9893RNXI integrates two Gigabit PHYs alongside the switch fabric, which eliminates external magnetics-side components and reduces BOM and PCB area for embedded industrial designs where board real estate is at a premium.
Key differentiating features include the integrated 1588v2 hardware timestamp engine for sub-microsecond PTP synchronization on industrial networks, the LinkMD TDR-based cable diagnostic function that pinpoints cable faults without external test gear, and on-chip termination resistors that simplify the magnetics interface. The device supports jumbo frames up to 9 KB, a 4096-entry forwarding table, and 128 kByte frame buffer architecture tuned for low-latency real-time traffic on factory and process-control networks.
Architecturally, the KSZ9893RNXI combines two 10/100/1000 PHYs with a third configurable MAC interface, an on-chip management controller, and dual MII/RMII management planes. The integrated PHY DSP uses adaptive equalization and three-stage NEXT cancellation to maintain 1000BASE-T link integrity over Cat5e cabling up to the IEEE-mandated 100 m channel.
Typical applications include industrial Ethernet switches, motor-control PLCs, building-automation gateways, IP surveillance NVRs, factory-floor IoT gateways, and any embedded system that needs to add two managed Gigabit Ethernet ports to a host CPU with minimal software burden. When designing with this device, provide a low-noise 1.2V/2.5V/3.3V power tree, follow Microchip's reference layout for the integrated PHY magnetics, and pair with a managed MAC address table sized to your VLAN count to avoid hash collisions.
This page synthesizes distributor pricing, validated drop-in alternatives, application notes, and selection guidance not aggregated on any single manufacturer page or distributor listing.
Alternatives de remplacement direct pour KSZ9893RNXI — 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 KSZ9893RNXI (même facteur de forme et même empreinte) — différant par Frame Buffer, Number of Ports, Operating Temperature, Package.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
KSZ9893RNXI-TR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
KSZ8895MQXI
✅ Remplacement direct✓ En stock
$5.39 / unité
Voir la fiche technique →KSZ9893RNXI Valeurs maximales et caractéristiques électriques
| Fonction | 3-Port Gigabit Ethernet Switch with integrated PHYs |
| Number of Ports | 3 (2x integrated PHY + 1x MAC interface) |
| PHY Interface | 10/100/1000 Base-TX IEEE 802.3 |
| MAC Interface (Port 3) | RGMII / MII / RMII (configurable) |
| Host Management Interface | SPI, I2C, MII, RMII |
| Standards Supported | IEEE 802.3, IEEE 802.3az (EEE), IEEE 1588v2 |
| Cable Diagnostics | LinkMD (TDR-based) |
| Wake-on-LAN | Yes (WOL) |
| Jumbo Frame Support | Up to 9 KB |
| Forwarding Table | 4096 entries |
| Frame Buffer | 128 kByte |
| Switch Architecture | Non-blocking store-and-forward |
| Température de fonctionnement | -40C to +85C (industrial) |
| Boîtier | 64-VQFN (8x8 mm) with exposed pad |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de KSZ9893RNXI
| Broche 1 | VDD_1P2 — 1.2V core supply (decoupling) |
| Broche 2 | VDDIO — I/O supply (1.8V/2.5V/3.3V) |
| Broche 3 | RESETn — Active-low hardware reset |
| Broche 4 | INTn — Active-low interrupt output to host |
| Broche 5 | SDA/MDIO — I2C data / MDIO data (strap-dependent) |
| Broche 6 | SCL/MDC — I2C clock / MDIO clock (strap-dependent) |
| Broche 7 | SPI_CLK — SPI clock for host management |
| Broche 8 | SPI_DO — SPI data out (to host) |
| Broche 9 | SPI_DI — SPI data in (from host) |
| Broche 10 | SPI_CS — SPI chip select, active low |
| Broche 11 | TX_CLK/P3_RXCLK — RGMII/MII Port 3 reference clock |
| Broche 12 | TXD0/P3_RXD0 — Port 3 transmit/receive data bit 0 |
| Broche 13 | TXD1/P3_RXD1 — Port 3 transmit/receive data bit 1 |
| Broche 14 | TXD2/P3_RXD2 — Port 3 transmit/receive data bit 2 |
| Broche 15 | TXD3/P3_RXD3 — Port 3 transmit/receive data bit 3 |
| Broche 16 | TX_CTL/P3_RXDV — Port 3 transmit enable / receive data valid |
| Broche 17 | RX_CLK/P3_TXCLK — Port 3 receive/transmit clock |
| Broche 18 | RXD0/P3_TXD0 — Port 3 receive/transmit data bit 0 |
| Broche 19 | RXD1/P3_TXD1 — Port 3 receive/transmit data bit 1 |
| Broche 20 | RXD2/P3_TXD2 — Port 3 receive/transmit data bit 2 |
| Broche 21 | RXD3/P3_TXD3 — Port 3 receive/transmit data bit 3 |
| Broche 22 | RX_CTL/P3_TXEN — Port 3 receive valid / transmit enable |
| Broche 23 | VDD_2P5 — 2.5V analog supply |
| Broche 24 | VDD_3P3 — 3.3V analog supply |
| Broche 25 | P1_D1P — Port 1 PHY twisted-pair positive |
| Broche 26 | P1_D1N — Port 1 PHY twisted-pair negative |
| Broche 27 | P1_D2P — Port 1 PHY twisted-pair positive |
| Broche 28 | P1_D2N — Port 1 PHY twisted-pair negative |
| Broche 29 | P1_D3P — Port 1 PHY twisted-pair positive |
| Broche 30 | P1_D3N — Port 1 PHY twisted-pair negative |
| Broche 31 | P1_D4P — Port 1 PHY twisted-pair positive |
| Broche 32 | P1_D4N — Port 1 PHY twisted-pair negative |
| Broche 33 | P1_LED0/P2_LED0 — Port 1/2 LED driver 0 |
| Broche 34 | P1_LED1/P2_LED1 — Port 1/2 LED driver 1 |
| Broche 35 | P1_LED2/P2_LED2 — Port 1/2 LED driver 2 |
| Broche 36 | P1_LED3/P2_LED3 — Port 1/2 LED driver 3 |
| Broche 37 | P2_D1P — Port 2 PHY twisted-pair positive |
| Broche 38 | P2_D1N — Port 2 PHY twisted-pair negative |
| Broche 39 | P2_D2P — Port 2 PHY twisted-pair positive |
| Broche 40 | P2_D2N — Port 2 PHY twisted-pair negative |
| Broche 41 | P2_D3P — Port 2 PHY twisted-pair positive |
| Broche 42 | P2_D3N — Port 2 PHY twisted-pair negative |
| Broche 43 | P2_D4P — Port 2 PHY twisted-pair positive |
| Broche 44 | P2_D4N — Port 2 PHY twisted-pair negative |
| Broche 45 | AVDD_1P2 — Analog 1.2V supply for PHYs |
| Broche 46 | AVDD_2P5 — Analog 2.5V supply for PHYs |
| Broche 47 | AVDD_3P3 — Analog 3.3V supply for PHYs |
| Broche 48 | REF_FILT — Reference filter capacitor node |
| Broche 49 | P1_REFCLKP — Port 1 reference clock positive (optional 125 MHz input) |
| Broche 50 | P1_REFCLKN — Port 1 reference clock negative |
| Broche 51 | P2_REFCLKP — Port 2 reference clock positive |
| Broche 52 | P2_REFCLKN — Port 2 reference clock negative |
| Broche 53 | GPIO0 — General-purpose I/O / strap input |
| Broche 54 | GPIO1 — General-purpose I/O / strap input |
| Broche 55 | GPIO2 — General-purpose I/O / strap input |
| Broche 56 | GPIO3 — General-purpose I/O / strap input |
| Broche 57 | GPIO4 — General-purpose I/O / strap input |
| Broche 58 | GPIO5 — General-purpose I/O / strap input |
| Broche 59 | GPIO6 — General-purpose I/O / strap input |
| Broche 60 | GPIO7 — General-purpose I/O / strap input |
| Broche 61 | XTAL1 — 25 MHz crystal input |
| Broche 62 | XTAL2 — 25 MHz crystal output |
| Broche 63 | TEST — Factory test pin (tie to GND) |
| Broche 64 | NC — Not connected (per datasheet) |
| Broche EP | EPAD — Exposed thermal pad - tie to GND with multiple vias |
Applications typiques
KSZ9893RNXI convient pour 6 applications: Industrial Ethernet Switch, Motor Control PLC, Building Automation Gateway, IP Surveillance NVR, Factory Floor IoT Gateway, Automotive Diagnostic Equipment.
Industrial Ethernet Switch
The KSZ9893RNXI is ideally suited for compact industrial Ethernet switches thanks to its two integrated Gigabit PHYs, IEEE 1588v2 hardware timestamping, and -40C to +85C industrial temperature range. With a 128 kByte frame buffer and 4096-entry forwarding table, the device handles bursty factory-floor traffic without dropping packets, while LinkMD cable diagnostics enable field technicians to pinpoint cable faults via the management interface without external TDR equipment. The 64-VQFN package footprint allows PCB designs under 50x50 mm for DIN-rail mounted switches.
Recommandé
Motor Control PLC
Programmable Logic Controllers driving servo motors and stepper drives require deterministic network timing, which the KSZ9893RNXI delivers through its on-die IEEE 1588v2 timestamp engine achieving sub-microsecond synchronization across distributed axes. The two Gigabit PHY ports enable daisy-chained EtherCAT or PROFINET topologies, while the RGMII/MII/RMII MAC port connects to the PLC's host CPU. EEE support reduces power consumption during idle periods in 24/7 production lines.
Recommandé
Building Automation Gateway
BACnet, Modbus TCP, and KNX gateways require reliable Layer-2 switching between HVAC controllers, lighting nodes, and access panels. The KSZ9893RNXI's VLAN tagging, IGMP snooping, and QoS prioritization isolate traffic classes so that latency-sensitive lighting controls are not impacted by bulk video-surveillance streams. Industrial temperature rating allows deployment in unconditioned mechanical rooms, and SPI management lets a low-cost host MCU configure the switch without an external Ethernet controller.
Recommandé
IP Surveillance NVR
Network Video Recorders aggregating multiple PoE camera streams benefit from the KSZ9893RNXI's 9 KB jumbo frame support and 128 kByte shared buffer, which prevent frame drops when several 4K H.265 streams converge on the NVR's storage subsystem. The Wake-on-LAN function allows scheduled activation of idle cameras to reduce power. QoS prioritization ensures recording traffic is never starved by lower-priority management traffic on the same switch fabric.
Recommandé
Factory Floor IoT Gateway
Industrial IoT gateways aggregating sensor data from PLCs, robots, and RFID readers require a managed switch that can segment traffic by VLAN and prioritize time-critical MQTT or OPC-UA publishes. The KSZ9893RNXI's hardware 1588v2 timestamping ensures sensor data is timestamp-accurate at the edge, simplifying back-end analytics. The exposed thermal pad on the 64-VQFN package supports fanless enclosures typical of sealed industrial gateways.
Recommandé
Automotive Diagnostic Equipment
While the KSZ9893RNXI is rated industrial-grade rather than AEC-Q100 automotive, it is widely used in bench-top and shop-floor diagnostic tools that interface with in-vehicle Ethernet networks up to 1000BASE-T. The two integrated PHYs allow simultaneous connection to a vehicle's diagnostic port and a workshop network uplink. LinkMD cable diagnostics help technicians identify faulty vehicle harness cabling without external TDR instruments.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour KSZ9893RNXI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | KSZ9893RNXI-TR | KSZ8895MQXI |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (8x8) | 64-VQFN (8x8) | 64-VQFN (8x8) |
| Port Count | 3 (2x PHY + 1x MAC) | 3 (2x PHY + 1x MAC) | 5 (5x PHY) |
| PHY Speed | 10/100/1000 Mbps | 10/100/1000 Mbps | 10/100 Mbps |
| IEEE 1588v2 | Yes | Yes | No |
| LinkMD Cable Diagnostics | Yes | Yes | No |
| EEE Support | Yes (IEEE 802.3az) | Yes (IEEE 802.3az) | No |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
Principaux différenciateurs
- Two integrated Gigabit PHYs eliminate external transceiver ICs (vs KSZ8895MQXI)
- IEEE 1588v2 hardware timestamping for sub-microsecond PTP (vs KSZ8895MQXI)
- LinkMD TDR-based cable diagnostics built in (vs KSZ8895MQXI)
Notes de conception
The KSZ9893RNXI requires three analog rails (1.2V, 2.5V, 3.3V) and one digital rail (VDDIO configurable 1.8V/2.5V/3.3V). Per the KSZ9893R datasheet, the 1.2V rail can be sourced from an internal LDO fed by the 2.5V rail to simplify BOM, but the 2.5V and 3.3V analog rails must be low-noise (target ripple < 10 mVpp) to maintain PHY SNR. Place 10 uF bulk and 0.1 uF ceramic decoupling within 3 mm of each supply pin group.
The 64-VQFN package uses a center exposed thermal pad that must be soldered to a continuous ground copper pour with a 5x5 via array (0.3 mm drill, 0.5 mm pitch) for both thermal dissipation and electrical grounding. Estimated: at maximum 1.5W dissipation, theta_JA on a 4-layer JEDEC test board is approximately 28 C/W, so the junction rises 42C above ambient at 85C ambient. Route the two Port-PHY differential pairs as 100-ohm differential with length matching within 2 mm and keep them isolated from the RGMII MAC traces by at least 3W spacing.
Do not leave strap pins floating - the KSZ9893RNXI samples GPIO/strap states at the end of reset to determine management interface (SPI vs I2C), MAC port mode (RGMII vs MII vs RMII), and PHY enable. Tie unused PHY ports to ground via 4.7 kohm resistors per the KSZ9893R datasheet strap configuration table. Also ensure the 25 MHz crystal load capacitance matches the crystal's specification (typically 18 pF total including PCB parasitics) to keep link drops below 0.01%.
Place the 25 MHz crystal within 5 mm of pins 61-62 and guard it with a ground ring to attenuate EMI coupling into adjacent analog blocks. The PHY magnetics should be located within 25 mm of the MDI pins (25-32 for Port 1, 37-44 for Port 2) and the MDI traces routed as 50-ohm single-ended or 100-ohm differential per the application note. Keep digital switching signals (SPI, RGMII) at least 10 mm away from the analog PHY traces.
Informations de conformité
RoHS and lead-free confirmed by Microchip product page. Industrial temperature grade only - no AEC-Q100 automotive variant is currently published by Microchip for the KSZ9893 family.
