KSZ8863RLLI-TR - 3-Port 10/100 Ethernet Switch w/ PHY | Microchip
MPN: KSZ8863RLLI-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.85 | $6.85 |
| 10 | $5.95 | $59.50 |
| 100 | $5.1 | $510.00 |
| 500 | $4.4 | $2,200.00 |
| 1,000 | $3.65 | $3,650.00 |
| 3,000 | $3.14 | $9,420.00 |
KSZ8863RLLI-TR Overview
An Ethernet switch IC is a Layer-2 networking semiconductor that interconnects multiple Ethernet ports within a system, performing MAC address learning, frame forwarding, and QoS prioritization. The KSZ8863 belongs to the unmanaged/lightly-managed switch IC family within the broader Ethernet controller category, sitting alongside standalone PHY transceivers and full Layer-2+ managed switches in the network IC taxonomy. Compared to a discrete PHY plus MAC, an integrated switch-on-chip reduces board area, BOM, and power while adding hardware-based QoS.
Key features include three integrated 10/100Base-TX PHYs with HP Auto-MDI/MDI-X, IEEE 802.1Q VLAN tagging support, QoS/priority queues with 802.1p, port-based rate limiting, and per-port cable diagnostics. The RLLI suffix indicates the LQFP-48 industrial-temperature variant (-40C to +85C) supplied in tape-and-reel packaging. The device operates from a single 3.3 V supply with typical power consumption around 0.5 W, and includes a 25 MHz reference clock input.
Internally the KSZ8863 uses a store-and-forward architecture with a 1.5 Mbit shared packet buffer, supports RMII for an external MAC or uplink port, and offers PHY loopback for diagnostics. The integrated PHYs include on-chip termination resistors and adaptive equalization, simplifying magnetics selection.
Typical applications include industrial Ethernet daisy-chaining, IP cameras and surveillance switches, building automation gateways, factory-floor sensor aggregation, automotive Ethernet gateway modules, and any embedded system that needs a small, low-power 3-port switch.
When designing with the KSZ8863RLLI-TR, follow the KSZ8863RLL Hardware Design Checklist for magnetics, RBIAS resistor, and 25 MHz crystal layout. Use short, impedance-controlled 100-ohm differential traces between the PHY outputs and the magnetics, and provide adequate bulk decoupling on each AVDD supply pin.
This page synthesizes distributor pricing, pin-compatible alternatives, and practical design notes that are not found in the manufacturer datasheet alone, helping embedded network designers select and source the right switch IC for their application.
Drop-in alternatives for KSZ8863RLLI-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with KSZ8863RLLI-TR (same form factor and footprint) — differing in Number of Ports, Package, RoHS Status, External MAC Interface, QoS.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
KSZ8863RLLI
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →KSZ8863MLLI
✅ Drop-In📋 Reference alternative (not in catalog)
KSZ8863MLLI-TR
✅ Drop-In📋 Reference alternative (not in catalog)
KSZ8863FLL
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →KSZ8863RLL
✅ Drop-In📋 Reference alternative (not in catalog)
KSZ8863RLL-TR
✅ Drop-In📋 Reference alternative (not in catalog)
KSZ8863RLLI-TR Maximum Ratings & Electrical Characteristics
| Product Type | 3-Port 10/100 Managed Ethernet Switch with PHYs |
| Ethernet Standard | IEEE 802.3, IEEE 802.3u (10/100Base-TX) |
| Number of Ports | 3 (integrated PHYs) |
| On-Chip PHYs | 3 x 10/100Base-TX |
| Auto-MDI/MDI-X | Yes (HP Auto-MDI/MDI-X) |
| Host Interface | I2C, SPI |
| External MAC Interface | RMII (one port, configurable) |
| Switch Architecture | Store-and-forward, 1.5 Mbit shared buffer |
| VLAN Support | IEEE 802.1Q VLAN tagging |
| QoS | IEEE 802.1p priority queues |
| Power Management | Energy Efficient Ethernet (EEE), Actiphy, Wake-on-LAN |
| Supply Voltage | 3.3 V (single supply) |
| Reference Clock | 25 MHz crystal / external clock |
| Package | 48-LQFP (7x7 mm) |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | MSL3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant |
KSZ8863RLLI-TR Pin Configuration
| Pin 1 | VDD33A — 3.3 V analog supply |
| Pin 2 | XI — 25 MHz crystal input |
| Pin 3 | XO — 25 MHz crystal output |
| Pin 4 | RBIAS — External bias resistor |
| Pin 5 | VDD33D — 3.3 V digital supply |
| Pin 6 | RESETn — Hardware reset (active low) |
| Pin 7 | INTn — Interrupt output (active low) |
| Pin 8 | SDA — I2C data |
| Pin 9 | SCL — I2C clock |
| Pin 10 | SCSN — SPI chip select (active low) |
| Pin 11 | SCLK — SPI clock |
| Pin 12 | SDO — SPI data out |
| Pin 13 | SDI — SPI data in |
| Pin 14 | MDIO — Management data I/O |
| Pin 15 | MDC — Management data clock |
| Pin 16 | TXD3/RMII_TXD0 — Port 3 transmit / RMII data |
| Pin 17 | TXEN3/RMII_TXEN — Port 3 transmit enable / RMII TX enable |
| Pin 18 | TXD2/REF_CLKI3 — Port 2 transmit / reference clock input |
| Pin 19 | RXD3/RMII_RXD0 — Port 3 receive / RMII data |
| Pin 20 | RXDV3/RMII_CRS_DV — Port 3 RX valid / RMII CRS_DV |
| Pin 21 | RXD2 — Port 2 receive data |
| Pin 22 | RXDV2 — Port 2 RX valid |
| Pin 23 | RXC2 — Port 2 receive clock |
| Pin 24 | TXC2 — Port 2 transmit clock |
| Pin 25 | TXEN2 — Port 2 transmit enable |
| Pin 26 | TXD2 — Port 2 transmit data |
| Pin 27 | TXD1 — Port 1 transmit data |
| Pin 28 | TXEN1 — Port 1 transmit enable |
| Pin 29 | TXC1 — Port 1 transmit clock |
| Pin 30 | RXC1 — Port 1 receive clock |
| Pin 31 | RXDV1 — Port 1 RX valid |
| Pin 32 | RXD1 — Port 1 receive data |
| Pin 33 | TXOP1 — Port 1 PHY TX positive |
| Pin 34 | TXON1 — Port 1 PHY TX negative |
| Pin 35 | RXIP1 — Port 1 PHY RX positive |
| Pin 36 | RXIN1 — Port 1 PHY RX negative |
| Pin 37 | TXOP2 — Port 2 PHY TX positive |
| Pin 38 | TXON2 — Port 2 PHY TX negative |
| Pin 39 | RXIP2 — Port 2 PHY RX positive |
| Pin 40 | RXIN2 — Port 2 PHY RX negative |
| Pin 41 | TXOP3 — Port 3 PHY TX positive |
| Pin 42 | TXON3 — Port 3 PHY TX negative |
| Pin 43 | RXIP3 — Port 3 PHY RX positive |
| Pin 44 | RXIN3 — Port 3 PHY RX negative |
| Pin 45 | AVDD — Analog supply |
| Pin 46 | AGND — Analog ground |
| Pin 47 | DVDD — Digital supply |
| Pin 48 | DGND — Digital ground |
Typical Applications
KSZ8863RLLI-TR is suitable for 6 applications: Industrial Ethernet Daisy-Chain Switch, IP Camera and Surveillance Switch, Building Automation Gateway, Factory Sensor Aggregation Node, Automotive Ethernet Gateway Module, Embedded System 3-Port Ethernet Switch.
Industrial Ethernet Daisy-Chain Switch
The KSZ8863RLLI-TR fits industrial daisy-chain Ethernet nodes because it integrates three 10/100 PHYs with HP Auto-MDI/MDI-X, store-and-forward switching, and IEEE 802.1Q VLAN tagging in a compact 48-LQFP. Its -40C to +85C industrial temperature rating and EEE/Actiphy power management let it survive factory-floor conditions while cutting idle power. Placed between two daisy-chain ports and one uplink to the controller, it eliminates external PHY ICs, reducing BOM and PCB area for line-powered sensors and edge controllers.
Recommended
IP Camera and Surveillance Switch
The KSZ8863RLLI-TR is well suited for multi-sensor IP cameras and surveillance hubs because its three integrated PHYs support two cameras plus an uplink, while the 1.5 Mbit shared buffer absorbs burst traffic from multiple video streams. QoS based on IEEE 802.1p prioritizes control and video channels, and Wake-on-LAN supports remote reboot of the camera. Compared to a discrete PHY+MAC solution, the integrated switch-on-chip shrinks PCB area inside dome-camera enclosures.
Recommended
Building Automation Gateway
For building automation gateways, the KSZ8863RLLI-TR provides three Ethernet ports to interconnect HVAC, lighting, and access-control subsystems on a single low-power managed switch. I2C and SPI host interfaces let a small microcontroller or BACnet processor configure VLANs, rate-limit, and QoS without an external Ethernet controller. EEE reduces idle power consumption in always-on gateways, and the 48-LQFP package supports reflow assembly into compact DIN-rail modules.
Recommended
Factory Sensor Aggregation Node
In factory sensor aggregation, the KSZ8863RLLI-TR's three PHYs allow a single aggregation node to connect two sensor zones plus a backhaul uplink with hardware-based QoS and rate limiting per port. The integrated store-and-forward architecture provides 1.5 Mbit of buffering, ensuring loss-free forwarding under bursty sensor traffic, and Wake-on-LAN allows remote polling. Operating from a single 3.3 V supply simplifies power-tree design in 24 V industrial systems with onboard regulation.
Recommended
Automotive Ethernet Gateway Module
The KSZ8863RLLI-TR serves automotive gateway modules where three Ethernet ports are needed to bridge in-vehicle networks, diagnostic interfaces, and telematics. Its industrial temperature range supports under-hood enclosures, and EEE/Actiphy low-power states reduce quiescent draw on battery-powered telematics units. The integrated PHYs and store-and-forward architecture reduce PCB area, while I2C management allows an automotive MCU to monitor link status and trigger Wake-on-LAN wake events on demand.
Recommended
Embedded System 3-Port Ethernet Switch
The KSZ8863RLLI-TR enables compact embedded systems with three Ethernet ports without external PHY ICs. Each integrated PHY includes HP Auto-MDI/MDI-X, eliminating straight-through/crossover cable concerns, while the shared 1.5 Mbit buffer handles mixed traffic bursts. The 25 MHz reference clock input can be shared with an external host MCU, and the small 48-LQFP (7x7 mm) footprint simplifies 4-layer PCB integration with controlled-impedance routing to magnetics.
Recommended
Recommended Products Summary
Engineering reference data for KSZ8863RLLI-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | KSZ8863RLLI | KSZ8863MLLI | KSZ8863MLLI-TR | KSZ8863FLL | KSZ8863RLL |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Number of Ports | 3 (integrated PHYs) | 3 (integrated PHYs) | 3 (integrated PHYs) | 3 (integrated PHYs) | 3 (integrated PHYs) | 3 (integrated PHYs) |
| Host Interface | I2C, SPI, RMII | I2C, SPI, RMII | I2C, SPI, MII | I2C, SPI, MII | I2C, SPI, MII/parallel | I2C, SPI, RMII |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | 0C to +70C |
| Packaging Form | Tape & Reel (TR) | Tray | Tray | Tape & Reel (TR) | Tray | Tray |
| EEE / Actiphy | Yes | Yes | Yes | Yes | Yes | Yes |
| VLAN/QoS | 802.1Q/802.1p | 802.1Q/802.1p | 802.1Q/802.1p | 802.1Q/802.1p | 802.1Q/802.1p | 802.1Q/802.1p |
| Approx Unit Price (qty 1) | $6.85 | ~$6.85 | ~$6.50 | ~$6.50 | ~$6.50 | ~$5.80 |
Key Differentiators
- Three integrated 10/100 PHYs in a single IC (vs KSZ8851-16MLL-TR)
- RMII uplink port for external host MAC (vs KSZ8863MLLI)
- Tape-and-reel packaging for SMT assembly (vs KSZ8863RLLI (tray))
- Industrial -40C to +85C temperature grade (vs KSZ8863RLL)
- EEE, Actiphy, and Wake-on-LAN integrated (vs Discrete PHY plus external switch IC)
Design Notes
Follow the KSZ8863RLL Hardware Design Checklist (document 00003048B) for magnetics and RBIAS placement. The RBIAS resistor (typically 12.4 kohm 1%) must connect directly to the RBIAS pin with minimal trace length to set the PHY bias currents. Place a 0.1 uF decoupling cap adjacent to each AVDD/VDD33A pin and a 10 uF bulk cap within 1 cm of the package for clean analog rail performance.
Route the 100-ohm differential TX/RX pairs between the KSZ8863RLLI-TR and the magnetics with controlled impedance, keeping intra-pair skew below 50 mils and length matching the positive and negative traces. Use short, direct ground returns and avoid routing digital signals (host bus, SPI, I2C) under the magnetics or differential pairs to prevent EMI coupling into the analog path.
Power the KSZ8863RLLI-TR from a low-noise 3.3 V LDO rather than directly from a switching converter to avoid degrading PHY signal integrity. Tie all AVDD and VDD33D pins to the same 3.3 V rail with star routing if possible. Hold RESETn low for at least 10 ms after power stable, and let the 25 MHz crystal oscillator stabilize before releasing reset to avoid PHY link-initialization failures.
Select magnetics compliant with IEEE 802.3 and rated for the KSZ8863RLLI-TR's 1:1 turns ratio with center tap on the PHY side. Avoid common-mode chokes unless required by EMI standards. For 100-meter cable compliance, ensure the PCB trace between the PHY and the magnetics is shorter than 50 mm and that the magnetics-to-RJ45 path matches 100-ohm differential impedance.
Common pitfalls when using the KSZ8863RLLI-TR include omitting the RBIAS resistor (PHY will not initialize), incorrect strap-pin pull-ups on host-interface mode select pins (defaults to wrong host bus), and using a noisy switch-mode supply that injects ripple into AVDD causing CRC errors. Verify the host interface mode (I2C/SPI/RMII) at reset by pulling the strap pins to the levels documented in datasheet Table 3-5 before issuing any register writes.
Compliance Information
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified; for AEC-Q100 automotive Ethernet, designers should evaluate Microchip's LAN969x or LAN8770 families. Halogen-free and lead-free per Microchip packaging materials declaration.
