KSZ8993MI

Specialized ICS Overview

The KSZ8993MI is a Layer 2 managed switch IC from Microchip Technology, housed in a 128-pin PQFP package. It integrates three MAC units and two 10/100 Ethernet PHYs compliant with IEEE 802.3u standards. The device supports 10BASE-T, 100BASE-TX, and 100BASE-FX on Port 1. Operating voltages include a 1.8V core supply and 3.3V I/O/transceiver supplies. Key features include a non-blocking switch fabric, 1K MAC address lookup table, store-and-forward architecture, and comprehensive management interfaces such as SMI, MIIM, SPI, and I2C.

Specialized ICS Feature Summary

• Integrated 3-Port 10/100 Managed Switch with Two PHYs and Three MACs
• Supports 10BASE-T, 100BASE-TX, and 100BASE-FX (Port 1)
• Comprehensive Management via SMI, MIIM, SPI, and I2C Interfaces
• Advanced Features: VLAN (IEEE 802.1q), QoS, IGMP Snooping, and Spanning Tree Protocol

Specialized ICS Applications

• Broadband Gateway/Firewall/VPN
• Integrated DSL or Cable Modem Multi-Port Router
• Wireless LAN Access Point + Gateway
• Residential and Enterprise VoIP Gateway/Phone
• Standalone 10/100 Switch

Specialized ICS Procurement Notes

Verify the specific suffix 'MI' against the manufacturer's current product identification system to confirm pinout, temperature grade, and packaging details. Ensure compatibility with required power supply rails (1.8V core and 3.3V I/O) during design-in. Check for any associated errata sheets relevant to the silicon revision.

Specialized ICS Selection Notes

Select the KSZ8993MI for applications requiring managed switching capabilities with low port counts. Choose this part over the unmanaged KSZ8993 if CPU control via SMI/SPI/I2C is required. Consider the KSZ8993ML if a single 3.3V supply rail is preferred, as it internally generates the 1.8V core voltage.

Specialized ICS Part Context

The KSZ8993M series represents a highly integrated solution for cost-sensitive Fast Ethernet systems. It combines patented mixed-signal low-power technology with a high-speed non-blocking switch fabric. The device is designed to support both managed and unmanaged configurations through I/O strapping or EEPROM programming.

Specialized ICS Replacement Considerations

The KSZ8993ML is a single-supply variant with identical functional features but different power pin configuration. Verify pin 22 functionality (VDDC input vs VOUT_1.8V output) when substituting.