KSZ8864RMNI

Controllers Overview

The KSZ8864RMNI is a Layer 2 managed 4-port Ethernet switch manufactured by Micrel (now Microchip Technology). It integrates four MACs and two PHYs, supporting 10/100Mbps data rates compliant with IEEE 802.3u standards. The device features a non-blocking shared memory-based switch fabric with 1.4Gbps bandwidth and an on-chip 64Kbyte frame buffer. It operates within an industrial temperature range of -40°C to +85°C and utilizes a 64-pin QFN package. Power supply requirements include 3.3V for analog VDDAT, 1.8V/2.5V/3.3V for VDDIO, and a low 1.2V core voltage.

Controllers Feature Summary

• Supports IEEE 802.1q VLAN groups and IEEE 802.1d RSTP for network segmentation and loop prevention.
• Provides dual MII/RMII interfaces via dedicated switches for flexible CPU connectivity.
• Includes comprehensive QoS capabilities with programmable rate limiting and per-port priority mapping.
• Features energy-detect mode for ultra-low power consumption when ports are inactive.

Controllers Applications

• VoIP phone systems
• Industrial control networks
• Automotive ethernet applications
• Set-top boxes and game consoles

Controllers Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature grade (-40°C to +85°C) distinct from commercial or automotive variants. Confirm package type matches the 64-pin QFN specification. Check for RoHS compliance status as indicated in ordering information. Ensure compatibility with existing SPI or SMI management interface designs.

Controllers Selection Notes

Select this component for cost-sensitive 10/100Mbps switch designs requiring integrated PHYs and MACs. Consider the industrial temperature rating for harsh environments. Evaluate the need for dual MII/RMII interfaces versus single port configurations. Verify power budget constraints against the 1.2V core and 3.3V analog requirements.

Controllers Part Context

This part belongs to the KSZ8864 family of integrated managed switches. Variants include the commercial grade KSZ8864RMN and the AEC-Q100 qualified automotive version KSZ8864RMNU. All share the same functional architecture but differ in temperature ranges and qualification standards.

Controllers Replacement Considerations

Public confirmed substitute part numbers: KSZ8864CNXIA-TR, KSZ8895FMQI.

Controllers FAQ

What is the maximum frame size supported?

The device supports huge frame sizes up to 2000 Bytes per frame, which can be enabled or disabled.

How many VLAN groups are supported?

It supports up to 128 VLAN groups, covering the full range of 4096 VLAN IDs.

What management interfaces are available?

The device supports Serial Management Interface (SMI), MDC/MDIO, high-speed SPI (up to 25MHz), and I2C master interface.