KSZ8873MLLJ Microchip Integrated Circuit (Quad Flat Packages) In Stock
Microchip KSZ8873MLLJ is a 3-port 10/100 Mbps Ethernet switch controller with an integrated PHY and 1.8 V core supply, housed in a QFP package with 0.5 mm terminal pitch and qualified for automotive temperature grade. It integrates switching fabric, MAC, and PHY layers to enable non-blocking Ethernet switching with minimal external components. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Quad Flat Packages
- Pin Count
- 64
- Lifecycle
- OBSOLETE
- Datasheet
- KSZ8873MLLJ Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of KSZ8873MLLJ?
- 3-port 10/100 Mbps Ethernet switch with integrated PHY eliminates need for external discrete PHY devices, reducing BOM complexity
- Automotive temperature grade qualification ensures reliable operation in harsh environments from -40°C to +85°C or beyond
- 1.8 V core supply voltage and integrated switching fabric reduce system power consumption in always-on embedded network nodes
- 0.5 mm pitch QFP package with 48 or more pins balances routing density with solderability for industrial and automotive PCB designs
What is KSZ8873MLLJ used for?
The KSZ8873MLLJ is used in automotive infotainment and in-vehicle networking systems where a compact 3-port 10/100 Mbps Ethernet switch is required to connect ECUs, cameras, and head units on a shared Ethernet backbone. It is also deployed in industrial automation controllers, factory floor field devices, and building automation gateways that require a low-power, integrated Ethernet switch without a dedicated Linux-capable processor. Embedded network appliances such as managed industrial switches and panel PCs benefit from its integrated PHY and self-contained switching operation.
What are the specifications of KSZ8873MLLJ?
| YTEOL | 0 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Package Shape | SQUARE |
| Supply Voltage-Nom | 1.8V |
| Telecom IC Type | LAN SWITCHING CIRCUIT |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | MATTE TIN |
| Terminal Pitch | 0.5mm |
| Package | Quad Flat Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | 5A991.B.1 |
| HTS Code | 8542.39.00.01 |
Where can I find the KSZ8873MLLJ datasheet?
KSZ8873MLLJ Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for KSZ8873MLLJ?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many Ethernet ports does the KSZ8873MLLJ support and at what speeds?
The KSZ8873MLLJ integrates 3 ports operating at 10 Mbps or 100 Mbps (10/100BASE-TX) with auto-negotiation support. Two ports connect via MII or RMII to a host processor or second PHY, while the third port functions as a physical Ethernet interface, enabling a complete 3-port switch solution without any external discrete Ethernet PHY chips.
For automotive designs, what temperature range does the KSZ8873MLLJ support under its automotive qualification?
The KSZ8873MLLJ carries an automotive temperature grade, supporting operation across the extended automotive range of -40°C to +85°C (AEC-Q100 Grade 2 equivalent or better). This makes it suitable for under-dash and cabin-mounted automotive network nodes where ambient temperatures routinely vary from cold-start winter conditions to high-temperature summer cabin environments without thermal derating.
What supply voltages does the KSZ8873MLLJ require, and how does its 1.8 V core compare to older Ethernet switches?
The KSZ8873MLLJ uses a 1.8 V core supply voltage for its internal digital logic, with additional 3.3 V I/O supply rails for the PHY and interface pins. Compared to older-generation Ethernet switches running at 2.5 V or 3.3 V core, the 1.8 V core significantly reduces dynamic power consumption — often by 30% to 50% — making it well-suited for energy-efficient embedded networking nodes and battery-backed industrial equipment.
Which embedded processor interfaces does the KSZ8873MLLJ support for host CPU connectivity?
The KSZ8873MLLJ supports MII (Media Independent Interface) and RMII (Reduced MII) host interfaces operating at 2.5 MHz to 50 MHz clock rates, enabling connection to a wide range of embedded processors including ARM Cortex-M and Cortex-A SoCs, MIPS microcontrollers, and embedded Linux platforms. An SPI management interface is also available for register configuration and network statistics readback, eliminating the need for a full MDIO bus controller in simple applications.
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