KS8993FL

Specialized ICS Overview

The KS8993FL is a single-chip Fast Ethernet media converter and integrated switch manufactured by Micrel (now Microchip Technology). It integrates three MACs, two PHY transceivers, frame buffers, and OAM functions compliant with TS-1000. Designed for 100BASE-FX to 10BASE-T or 100BASE-TX conversion in FTTx markets, it supports Layer 2 switching with VLAN and QoS features. The device operates on dual supplies: 1.8V core and 3.3V I/O/transceiver. It is housed in a 128-pin PQFP package and supports interfaces including MII/SNI, SPI, MIIM, SMI, and I2C.

Specialized ICS Feature Summary

• Integrated 3-port 10/100 Ethernet switch with 3 MACs and 2 PHYs
• TS-1000 OAM support for remote loopback and far-end fault detection
• IEEE 802.1q VLAN and 802.1p/q QoS prioritization
• Programmable rate limiting and broadcast storm protection

Specialized ICS Applications

• 100BASE-FX to 10BASE-T media conversion
• 100BASE-FX to 100BASE-TX media conversion
• FTTx subscriber access networks

Specialized ICS Procurement Notes

Verify the manufacturer status as Micrel assets were acquired by Microchip Technology. Confirm the specific ordering suffix 'FL' indicates the single-supply version with identical features to the standard KS8993F. Check current availability as this component may be subject to end-of-life notices or obsolescence management.

Specialized ICS Selection Notes

Select the KS8993FL when a single power supply design is required, as it internally generates the 1.8V core voltage from the 3.3V input. Ensure the application requires TS-1000 OAM capabilities for carrier-grade subscriber management. Verify that the 128-PQFP package fits the PCB layout constraints.

Specialized ICS Part Context

The KS8993FL is part of the KS8993 family, which also includes the KSZ8993 variants. The 'KS' prefix typically denotes the original Micrel branding, while 'KSZ' represents the post-acquisition Microchip branding. The 'FL' suffix specifically identifies the single-supply configuration variant within this product line.

Specialized ICS Replacement Considerations

Direct replacements include the KSZ8993FL. For legacy systems requiring the original Micrel branding, the KS8993F is functionally equivalent but requires dual supplies (1.8V and 3.3V).