KSZ9893RNXI - 3-Port Gigabit Ethernet Switch, 64-VQFN | Microchip
MPN: KSZ9893RNXI ✓ פעילKSZ9893RNXI סקירה
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.
חלופות תחליף ישיר עבור KSZ9893RNXI — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם KSZ9893RNXI (אותו גורם צורה וטביעת רגל) — שונים ב Frame Buffer, Number of Ports, Operating Temperature, Package.
KSZ9893RNXI-TR
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
KSZ8895MQXI
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←KSZ9893RNXI דירוגים מרביים ומאפיינים חשמליים
| פונקציה | 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 |
| טמפרטורת פעולה | -40C to +85C (industrial) |
| מארז | 64-VQFN (8x8 mm) with exposed pad |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
תצורת פינים של KSZ9893RNXI
| פין 1 | VDD_1P2 — 1.2V core supply (decoupling) |
| פין 2 | VDDIO — I/O supply (1.8V/2.5V/3.3V) |
| פין 3 | RESETn — Active-low hardware reset |
| פין 4 | INTn — Active-low interrupt output to host |
| פין 5 | SDA/MDIO — I2C data / MDIO data (strap-dependent) |
| פין 6 | SCL/MDC — I2C clock / MDIO clock (strap-dependent) |
| פין 7 | SPI_CLK — SPI clock for host management |
| פין 8 | SPI_DO — SPI data out (to host) |
| פין 9 | SPI_DI — SPI data in (from host) |
| פין 10 | SPI_CS — SPI chip select, active low |
| פין 11 | TX_CLK/P3_RXCLK — RGMII/MII Port 3 reference clock |
| פין 12 | TXD0/P3_RXD0 — Port 3 transmit/receive data bit 0 |
| פין 13 | TXD1/P3_RXD1 — Port 3 transmit/receive data bit 1 |
| פין 14 | TXD2/P3_RXD2 — Port 3 transmit/receive data bit 2 |
| פין 15 | TXD3/P3_RXD3 — Port 3 transmit/receive data bit 3 |
| פין 16 | TX_CTL/P3_RXDV — Port 3 transmit enable / receive data valid |
| פין 17 | RX_CLK/P3_TXCLK — Port 3 receive/transmit clock |
| פין 18 | RXD0/P3_TXD0 — Port 3 receive/transmit data bit 0 |
| פין 19 | RXD1/P3_TXD1 — Port 3 receive/transmit data bit 1 |
| פין 20 | RXD2/P3_TXD2 — Port 3 receive/transmit data bit 2 |
| פין 21 | RXD3/P3_TXD3 — Port 3 receive/transmit data bit 3 |
| פין 22 | RX_CTL/P3_TXEN — Port 3 receive valid / transmit enable |
| פין 23 | VDD_2P5 — 2.5V analog supply |
| פין 24 | VDD_3P3 — 3.3V analog supply |
| פין 25 | P1_D1P — Port 1 PHY twisted-pair positive |
| פין 26 | P1_D1N — Port 1 PHY twisted-pair negative |
| פין 27 | P1_D2P — Port 1 PHY twisted-pair positive |
| פין 28 | P1_D2N — Port 1 PHY twisted-pair negative |
| פין 29 | P1_D3P — Port 1 PHY twisted-pair positive |
| פין 30 | P1_D3N — Port 1 PHY twisted-pair negative |
| פין 31 | P1_D4P — Port 1 PHY twisted-pair positive |
| פין 32 | P1_D4N — Port 1 PHY twisted-pair negative |
| פין 33 | P1_LED0/P2_LED0 — Port 1/2 LED driver 0 |
| פין 34 | P1_LED1/P2_LED1 — Port 1/2 LED driver 1 |
| פין 35 | P1_LED2/P2_LED2 — Port 1/2 LED driver 2 |
| פין 36 | P1_LED3/P2_LED3 — Port 1/2 LED driver 3 |
| פין 37 | P2_D1P — Port 2 PHY twisted-pair positive |
| פין 38 | P2_D1N — Port 2 PHY twisted-pair negative |
| פין 39 | P2_D2P — Port 2 PHY twisted-pair positive |
| פין 40 | P2_D2N — Port 2 PHY twisted-pair negative |
| פין 41 | P2_D3P — Port 2 PHY twisted-pair positive |
| פין 42 | P2_D3N — Port 2 PHY twisted-pair negative |
| פין 43 | P2_D4P — Port 2 PHY twisted-pair positive |
| פין 44 | P2_D4N — Port 2 PHY twisted-pair negative |
| פין 45 | AVDD_1P2 — Analog 1.2V supply for PHYs |
| פין 46 | AVDD_2P5 — Analog 2.5V supply for PHYs |
| פין 47 | AVDD_3P3 — Analog 3.3V supply for PHYs |
| פין 48 | REF_FILT — Reference filter capacitor node |
| פין 49 | P1_REFCLKP — Port 1 reference clock positive (optional 125 MHz input) |
| פין 50 | P1_REFCLKN — Port 1 reference clock negative |
| פין 51 | P2_REFCLKP — Port 2 reference clock positive |
| פין 52 | P2_REFCLKN — Port 2 reference clock negative |
| פין 53 | GPIO0 — General-purpose I/O / strap input |
| פין 54 | GPIO1 — General-purpose I/O / strap input |
| פין 55 | GPIO2 — General-purpose I/O / strap input |
| פין 56 | GPIO3 — General-purpose I/O / strap input |
| פין 57 | GPIO4 — General-purpose I/O / strap input |
| פין 58 | GPIO5 — General-purpose I/O / strap input |
| פין 59 | GPIO6 — General-purpose I/O / strap input |
| פין 60 | GPIO7 — General-purpose I/O / strap input |
| פין 61 | XTAL1 — 25 MHz crystal input |
| פין 62 | XTAL2 — 25 MHz crystal output |
| פין 63 | TEST — Factory test pin (tie to GND) |
| פין 64 | NC — Not connected (per datasheet) |
| פין EP | EPAD — Exposed thermal pad - tie to GND with multiple vias |
יישומים טיפוסיים
KSZ9893RNXI מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור KSZ9893RNXI — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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) |
מבדילים עיקריים
- Two integrated Gigabit PHYs eliminate external transceiver ICs (לעומתKSZ8895MQXI)
- IEEE 1588v2 hardware timestamping for sub-microsecond PTP (לעומתKSZ8895MQXI)
- LinkMD TDR-based cable diagnostics built in (לעומתKSZ8895MQXI)
הערות תכנון
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.
מידע על תאימות
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.
