KSZ8873MLLV

Controllers Overview

The KSZ8873MLLV is a highly integrated 3-port managed Ethernet switch-on-a-chip IC manufactured by Microchip Technology. It features two 10/100BASE-T/TX transceivers and one MII interface, designed for cost-sensitive and power-efficient systems. The device supports IEEE 802.3u standards with a non-blocking switch fabric, store-and-forward architecture, and a 1k MAC address lookup table. It operates within an industrial temperature range of –40°C to +85°C and is available in a 64-pin LQFP package.

Controllers Feature Summary

• Advanced Layer 2 switching capabilities including IEEE 802.1q VLAN support for up to 16 groups and per-port tagging options.
• Comprehensive Quality of Service (QoS) support with IPv4/IPv6 classification, DiffServ-based prioritization, and programmable rate limiting on ingress and egress ports.
• Flexible management interfaces allowing access via Serial Management Interface (SMI), MIIM, high-speed SPI, or I2C, alongside I/O pin strapping for unmanaged configurations.
• Integrated power management schemes including hardware/software power-down modes, energy-detect mode, and dynamic clock tree shutdown to minimize dissipation.

Controllers Applications

• VoIP Phone
• Set-Top/Game Box
• Automotive Ethernet
• Industrial Control
• SOHO Residential Gateway

Controllers Procurement Notes

Verify the specific suffix 'V' against official Microchip documentation to confirm if it denotes a valid commercial variant or a specific qualification grade distinct from the standard MLL/FLL/RLL series. Ensure the component source provides traceability to the manufacturer's original packaging and quality certifications.

Controllers Selection Notes

Select this component when designing systems requiring a managed 3-port switch with low power consumption and industrial temperature resilience. It is suitable for applications needing flexible CPU control via multiple serial interfaces and advanced traffic management features like VLANs and QoS.

Controllers Part Context

The KSZ8873 family includes variants such as the KSZ8873MLL (MII interface), KSZ8873RLL (RMII interface), and KSZ8873FLL (fiber interface). These devices share the same core switch engine and PHY architecture but differ in their host interface and physical layer media support, catering to diverse system integration requirements.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs using the KSZ8873MLL, KSZ8873RLL, or KSZ8873FLL based on interface requirements.

Controllers FAQ

What interfaces does the KSZ8873MLLV support for CPU control?

The device supports comprehensive configuration register access via Serial Management Interface (SMI), MII Management (MIIM), High Speed SPI, and I2C interfaces.

Does the KSZ8873MLLV support bypass mode?

Yes, it offers a bypass feature that automatically sustains switch function between Port 1 and Port 2 when the CPU (Port 3 Interface) enters sleep mode.

What VLAN features are included in this switch?

It supports IEEE 802.1q VLAN for up to 16 groups with full range VLAN IDs, per-port VLAN ID tag/untag options, and IEEE 802.1p/q tag insertion or removal on a per-port basis.