ADM6996LHX-AC-T-1

Overview

The ADM6996LHX-AC-T-1 is a six-port Ethernet switch controller integrating five 10/100 Mbps twisted pair ports and one MII interface port. It supports full/half duplex operation, auto-negotiation, and Auto MDIX. The device features an embedded MAC, PHY, and SRAM memory block for packet buffering and address learning. Key specifications include support for up to 2048 MAC addresses, 802.1Q VLAN tagging with 16 groups, and 802.1p QoS priority handling via four output queues. Power supply requirements are 1.8V and 3.3V, housed in a 128-pin PQFP package.

Feature Summary

• Integrates five 10/100 Mbps twisted pair interfaces and one MII port within a single chip architecture.
• Supports advanced switching functions including 802.1Q VLAN, 802.1p QoS, and per-port MAC address locking.
• Includes built-in SRAM for packet buffering and address learning table storage.
• Provides hardware flow control mechanisms such as 802.3x pause packets and back pressure.

Applications

• SOHO (Small Office/Home Office) 5-port switches
• Router applications utilizing the MII CPU interface
• Low-cost standalone bridge implementations

Procurement Notes

Verify component authenticity through authorized Infineon distributors or official channels. Confirm RoHS compliance status and check for specific manufacturing date codes relevant to project timelines. Ensure proper ESD handling procedures are followed during assembly due to the CMOS technology used.

Selection Notes

Select this component for designs requiring integrated switching capabilities without external PHYs. Consider the 128-pin PQFP package constraints for PCB layout. Verify that the host system can provide the required 1.8V and 3.3V power rails and supports the necessary EEPROM configuration interface.

Part Context

This part belongs to the ADM6996 family of Ethernet switch controllers developed by Infineon-ADMtek. It serves as a cost-effective solution for network edge devices, combining switching fabric, MAC, and PHY layers into a single silicon die to reduce bill-of-materials complexity.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include ADM6996A1T3, ADM6996A2T1, ADM6996FAAT1, ADM6996LAAT1, and ADM6996LX-AA-T-1. Verify pin compatibility and register mapping before substitution.

FAQ

What is the maximum number of MAC addresses supported?

The ADM6996L supports an address recognition algorithm capable of recognizing up to 2048 different MAC addresses.

Does the device support VLAN functionality?

Yes, it supports 802.1Q VLAN with Tag/Untag capabilities and implements up to 16 VLAN groups using the last four bits of the VLAN ID.

How is flow control handled when the buffer is full?

It supports 802.3x Flow Control pause packets for Full Duplex mode and Back Pressure function for Half Duplex mode to prevent packet loss.