KSZ8863RLLI - 3-Port 10/100 Switch w/ RMII | Microchip
MPN: KSZ8863RLLI ✓ פעילKSZ8863RLLI סקירה
A managed Ethernet switch is a Layer 2 network device that uses a switch fabric to forward Ethernet frames between connected ports based on MAC address tables, while providing management features such as VLAN, QoS, port mirroring, and rate limiting. The KSZ8863RLLI sits in the hierarchy: Ethernet switch -> managed switch -> Layer 2 switch -> networking IC -> semiconductor. It is part of the IEEE 802.3 / 802.3u family of Fast Ethernet devices, supporting auto-negotiation per Clause 28 of the IEEE 802.3u specification.
Key features include integrated 10/100BASE-TX PHYs with HP auto-MDI/MDIX (no external magnetics on the PHY side), support for fiber mode on Port 3, an RMII interface to an external MAC or host, an I2C/SPI host management interface, advanced power management including energy-detect mode, and 1.4 KB packet buffer per port. The device operates from -40C to +85C industrial temperature range.
Architecture is built on a store-and-forward switch fabric with 1 Gbps total bandwidth, supporting wire-speed non-blocking forwarding on all three ports. The device includes IEEE 802.1Q VLAN, 802.1p QoS priority queues, port-based access control, and IGMP snooping for multicast filtering. The 48-pin LQFP package allows simple 4-layer PCB assembly using standard lead-free reflow.
Typical applications include industrial Ethernet sensor networks, IP surveillance cameras with daisy-chained switch ports, building automation backbones, factory automation PLCs, and embedded IoT gateways requiring multiple Ethernet ports. The integrated PHYs and small package reduce BOM cost and PCB area versus discrete MAC+PHY solutions.
When designing with this device, designers should follow the KSZ8863RLL Hardware Design Checklist from Microchip for crystal and magnetics selection. The 25 MHz reference clock drives the internal PHYs; PHY-to-MAC connection should use impedance-controlled traces per IEEE 802.3 100BASE-TX.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
חלופות תחליף ישיר עבור KSZ8863RLLI — 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 KSZ8863RLLI (אותו גורם צורה וטביעת רגל) — שונים ב Number of Ports, External MAC Interface, Fiber Support, Reference Clock.
KSZ8863MLLI
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←KSZ8863FLLI
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←KSZ8873FLLI
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←KSZ8863RLLI דירוגים מרביים ומאפיינים חשמליים
| Product Type | 3-Port 10/100 Managed Ethernet Switch with PHYs |
| קצב נתונים | 10/100 Mbps per port |
| Number of Ports | 3 |
| PHY Interfaces | 3x integrated 10/100BASE-TX PHYs |
| Host CPU Interface | I2C / SPI (non-PCI) |
| External MAC Interface | 1x RMII |
| Fiber Support | Port 3 supports 100BASE-FX |
| Switch Bandwidth | 1 Gbps non-blocking |
| Auto-Negotiation | IEEE 802.3u Clause 28 |
| Auto-MDI/MDIX | Yes, HP auto-crossover on all ports |
| טמפרטורת פעולה | -40C to +85C (industrial) |
| מארז | 48-LQFP (7x7 mm) |
| סוג הרכבה | Surface Mount |
| סטטוס RoHS | Compliant |
| Reference Clock | 25 MHz external crystal |
תצורת פינים של KSZ8863RLLI
| פין 1 | VDD_33 — 3.3V digital supply |
| פין 2 | GND — Ground |
| פין 3 | X1 — 25 MHz crystal input |
| פין 4 | X2 — 25 MHz crystal output |
| פין 5 | RST_N — Hardware reset (active low) |
| פין 6 | SCL — I2C clock / SPI clock |
| פין 7 | SDA — I2C data / SPI data |
| פין 8 | SPISL — SPI/I2C mode select strap |
| פין 9 | INT_N — Interrupt output (active low) |
| פין 10 | LED1_1 — Port 1 LED indicator |
| פין 11 | LED1_2 — Port 1 LED indicator |
| פין 12 | LED2_1 — Port 2 LED indicator |
| פין 13 | LED2_2 — Port 2 LED indicator |
| פין 14 | LED3_1 — Port 3 LED indicator |
| פין 15 | LED3_2 — Port 3 LED indicator |
| פין 16 | RMII_REF_CLK — RMII reference clock input |
| פין 17 | RMII_CRS_DV — RMII carrier sense / data valid |
| פין 18 | RMII_RXD0 — RMII receive data 0 |
| פין 19 | RMII_RXD1 — RMII receive data 1 |
| פין 20 | RMII_TXEN — RMII transmit enable |
| פין 21 | RMII_TXD0 — RMII transmit data 0 |
| פין 22 | RMII_TXD1 — RMII transmit data 1 |
| פין 23 | RMII_MDC — RMII management clock |
| פין 24 | RMII_MDIO — RMII management data |
| פין 25 | VDD_33A — 3.3V analog supply |
| פין 26 | GNDA — Analog ground |
| פין 27 | P1_RXP — Port 1 PHY receive positive |
| פין 28 | P1_RXN — Port 1 PHY receive negative |
| פין 29 | P1_TXP — Port 1 PHY transmit positive |
| פין 30 | P1_TXN — Port 1 PHY transmit negative |
| פין 31 | P2_RXP — Port 2 PHY receive positive |
| פין 32 | P2_RXN — Port 2 PHY receive negative |
| פין 33 | P2_TXP — Port 2 PHY transmit positive |
| פין 34 | P2_TXN — Port 2 PHY transmit negative |
| פין 35 | P3_RXP — Port 3 PHY receive positive (copper) |
| פין 36 | P3_RXN — Port 3 PHY receive negative (copper) |
| פין 37 | P3_TXP — Port 3 PHY transmit positive (copper) |
| פין 38 | P3_TXN — Port 3 PHY transmit negative (copper) |
| פין 39 | FX_SD — Port 3 fiber signal detect |
| פין 40 | FX_RXP — Port 3 fiber receive positive |
| פין 41 | FX_RXN — Port 3 fiber receive negative |
| פין 42 | FX_TXP — Port 3 fiber transmit positive |
| פין 43 | FX_TXN — Port 3 fiber transmit negative |
| פין 44 | GPIO0 — General purpose IO / strap config |
| פין 45 | GPIO1 — General purpose IO / strap config |
| פין 46 | GPIO2 — General purpose IO / strap config |
| פין 47 | VDD_33 — 3.3V digital supply |
| פין 48 | GND — Ground |
יישומים טיפוסיים
KSZ8863RLLI מתאים עבור 6 יישוםs: Industrial Ethernet Sensor Networks, IP Surveillance Camera Daisy-Chain, Building Automation Backbone, Factory Automation PLC, Embedded IoT Gateway, Multi-Port Network Printer / MFP.
Industrial Ethernet Sensor Networks
The KSZ8863RLLI's three integrated 10/100BASE-TX PHYs and 48-LQFP industrial temperature rating make it well-suited to multi-port industrial sensor backbones. With 1 Gbps non-blocking switch fabric and IEEE 802.1Q VLAN support, the device isolates sensor traffic while supporting QoS prioritization for time-critical control messages. The -40C to +85C operation and HP auto-MDI/MDIX remove the need for crossover cables in field installations. Engineers typically place it on a sensor hub or PLC backplane with isolated magnetics on each RJ45, drawing power from a 3.3V rail. Compared with discrete MAC+PHY designs, the integrated approach cuts BOM count by 2-3 ICs.
מומלץ
IP Surveillance Camera Daisy-Chain
IP cameras with PoE and daisy-chained switch ports benefit from the KSZ8863RLLI's three-port managed switch with I2C/SPI host management. The on-chip PHYs connect one port to the network uplink, one to the local camera SoC's MAC, and one to a downstream daisy-chained camera - all without external magnetics on the PHY side. The integrated switch provides 802.1p QoS to prioritize video traffic over management frames. Power consumption is low enough for PoE Class 2/3 budgets. The 48-LQFP package fits a small camera PCB, and industrial temperature rating supports outdoor IP66 enclosures.
מומלץ
Building Automation Backbone
Building automation controllers requiring multiple Ethernet ports for HVAC, lighting, and access control subsystems use the KSZ8863RLLI as a compact managed switch fabric. The I2C/SPI host interface allows a low-cost microcontroller to manage VLAN segmentation per subsystem, isolating building management traffic. Port 3 fiber support (100BASE-FX) lets the device bridge to long-distance building backbone cabling up to 2 km. The industrial temperature grade and Microchip long-term supply support makes the device suitable for 10-15 year building lifecycle deployments per typical building automation product lifetimes.
מומלץ
Factory Automation PLC
Programmable Logic Controllers and industrial gateways use the KSZ8863RLLI to provide daisy-chainable Ethernet ports for EtherNet/IP, PROFINET, or Modbus TCP fieldbus traffic. The device's store-and-forward architecture with 1 Gbps fabric bandwidth delivers deterministic latency for real-time control loops. IEEE 802.1Q VLAN tagging allows logical separation of control and monitoring traffic on the same physical port. The -40C to +85C industrial rating and Microchip long-term product support fit the 10+ year lifecycle typical of industrial PLC deployments in factory automation.
מומלץ
Embedded IoT Gateway
Embedded IoT gateways consolidating multiple Ethernet devices (sensors, edge controllers, wireless APs) into a single managed switch use the KSZ8863RLLI for its small footprint, low power, and integrated PHYs. The 48-LQFP 7x7 mm package allows the device to fit on compact gateway PCBs alongside WiFi/BLE modules. The I2C management interface lets a Linux SoC configure VLANs, port mirroring, and QoS for traffic shaping between WAN and LAN segments. The integrated HP auto-MDI/MDIX eliminates cable-type errors in field installations by installers who may use straight-through cables on all ports.
מומלץ
Multi-Port Network Printer / MFP
Multi-function printers and network print servers that expose multiple Ethernet segments (internal, guest, secure) use the KSZ8863RLLI as a 3-port Layer 2 managed switch. The on-chip PHYs reduce PCB area versus a 3-chip MAC+PHY+switch solution. The I2C/SPI host interface allows the printer's main MCU to configure port-based access control, blocking guest traffic from secure internal networks. Low power consumption helps the device fit within ENERGY STAR printer power budgets. The industrial temperature grade supports commercial printer environments with elevated operating temperatures in enclosed printer chassis.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור KSZ8863RLLI — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | KSZ8863MLLI | KSZ8863FLLI | KSZ8873FLLI |
|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Ports | 3 | 3 | 3 | 3 |
| Data Rate | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| External MAC Interface | 1x RMII | 1x MII | 1x MII | 1x MII |
| Fiber Support | Port 3 only (100BASE-FX) | Port 3 only (100BASE-FX) | Port 3 only (100BASE-FX) | All 3 ports (100BASE-FX) |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +85C (industrial) |
| RoHS Compliance | Yes | Yes | Yes | Yes |
מבדילים עיקריים
- Pin-compatible same-family alternative with MII instead of RMII (לעומתKSZ8863MLLI)
- Lower-cost same-family option if MII host is acceptable (לעומתKSZ8863FLLI)
- 3-port fiber on Port 3 only vs all 3 ports fiber (לעומתKSZ8873FLLI)
הערות תכנון
Place the 25 MHz crystal within 5 mm of the X1/X2 pins, with a ground guard ring around the crystal traces to minimize reference-clock jitter. The KSZ8863RLL Hardware Design Checklist from Microchip specifies that the X1 pin capacitor (pin 10) is system-dependent and must be tuned for the crystal CL and PCB stray capacitance. Use a crystal with ESR less than 50 ohm and 20 pF load capacitance for stable 25 MHz operation across the industrial -40C to +85C range.
Route the 100BASE-TX differential pairs (P1_TXP/N, P1_RXP/N, etc.) as 100 ohm differential impedances with matched length to within 2 mm. Keep the analog supply (VDD_33A) and digital supply (VDD_33) separated with ferrite beads to prevent switching noise from coupling into the PHY analog sections. The Port 3 fiber pins (FX_RXP/N, FX_TXP/N) should be guarded by a continuous ground plane to prevent crosstalk with the copper Port 3 differential pairs.
Do not leave the RMII_REF_CLK pin floating - it requires a 50 MHz reference clock from the host MAC or external oscillator. The HP auto-MDI/MDIX function eliminates the need for crossover cables, but if you wire Port 3 in fiber mode, you must strap the appropriate GPIO to disable the copper PHY on that port. The I2C/SPI mode select strap (SPISL) must be pulled up or down at reset to select the correct management interface - leaving it floating causes unpredictable behavior per the Microchip datasheet strap configuration table.
מידע על תאימות
RoHS compliant per Microchip product page. Industrial temperature grade -40C to +85C. AEC-Q100 not applicable (industrial/consumer, not automotive qualified).