Infineon Technologies ADM6996LX-AA-T-1

Overview

ADM6996LX-AA-T-1 from Infineon Technologies (formerly ADMtek) is a single-chip 6-port 10/100 Mb/s Ethernet switch controller integrating six 10/100 PHYs, MII interfaces, VLAN support, priority-based QoS, and embedded memory for address learning and forwarding. It operates at 3.3 V, supports auto-negotiation and Auto MDI/MDIX, and targets compact embedded networking applications such as industrial gateways and VoIP endpoints.

For engineers reviewing the ADM6996LX-AA-T-1 datasheet, ADM6996LX-AA-T-1 pinout, ADM6996LX-AA-T-1 application, or ADM6996LX-AA-T-1 equivalent, key selection considerations include integrated PHY count, MII interface compatibility, VLAN tagging capability, and 48-pin LQFP package constraints in space-constrained switch designs.

Technical Context

The ADM6996LX-AA-T-1 implements a full-layer-2 switching engine with hardware-accelerated address learning (1K MAC entries), aging (300 s default), and store-and-forward packet handling. Its integrated PHYs support both 10Base-T and 100Base-TX modes with adaptive equalization, jabber protection, and link polarity detection.

Switching logic includes broadcast storm filtering, port locking, per-port bandwidth control (via 6 configurable registers), and IEEE 802.1p priority mapping across 8 traffic classes. The device uses an internal clock synthesizer and supports external 25 MHz crystal or 50 MHz reference clock input.

Key Specifications

Pinout & Package

ADM6996LX-AA-T-1 is housed in a 48-pin LQFP package with exposed thermal pad (EP). Pin functions are grouped into twisted-pair PHY I/O (TX+/−, RX+/− per port), MII signals (TXD[3:0], RXD[3:0], TX_EN, RX_DV, CRS, COL, REF_CLK), LED controls (LED0–LED5), EEPROM interface (SCL/SDA), and power/ground (VDDIO, VDDA, GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-port 10/100 Ethernet switch controller applications.

Compared with Marvell 88E6060-B0-LF and Realtek RTL8306SD-GR, ADM6996LX-AA-T-1 uniquely integrates all six PHYs and clock synthesis in one 48-pin LQFP, minimizing external components while retaining full MII compatibility and per-port bandwidth control-critical for compact, cost-sensitive embedded switches.

Availability

ADM6996LX-AA-T-1 is available at Aetrix Electronics and suitable for industrial gateways, VoIP endpoints, building controllers, and small-office print servers requiring stable component supply and long-term design-in support.

Supply support for ADM6996LX-AA-T-1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies acquired ADMtek in 2003 and integrated its Ethernet switch portfolio into its industrial connectivity solutions line. ADMtek was a Taiwan-based fabless semiconductor company specializing in networking SoCs.

The ADM6996L series belongs to Infineon's legacy embedded Ethernet switch controller product line, designed specifically for cost-optimized, space-constrained layer-2 switching in industrial and consumer edge devices without requiring external PHYs or complex software stacks.

FAQ

Does ADM6996LX-AA-T-1 support Gigabit Ethernet?

No. ADM6996LX-AA-T-1 supports only 10/100 Mb/s speeds across all six ports. It lacks 1000BASE-T PHY circuitry, MII extensions like GMII or RGMII, and the necessary SerDes or gigabit MAC logic. Its register map, timing specifications, and block diagram confirm exclusive 10/100 operation.

What is the maximum MAC address table size and aging time?

The device supports 1,024 MAC address entries stored in on-chip SRAM. Aging time is fixed at 300 seconds (5 minutes) and not user-configurable via registers. Address learning occurs automatically on ingress frames, and aged-out entries are purged without host intervention.

Can ADM6996LX-AA-T-1 operate without an external EEPROM?

Yes. Default configuration is loaded from internal ROM if EEPROM is absent or fails CRC check. Critical settings-including PHY enable/disable, VLAN mode, and port priority-can be overridden via serial register writes after power-up, enabling EEPROM-less boot in constrained systems.

Is the 48-pin LQFP package RoHS-compliant?

Yes. ADM6996LX-AA-T-1 carries the "-T" suffix per Infineon's part numbering convention, indicating lead-free (Pb-free) and RoHS-compliant packaging. The datasheet revision history and Infineon's 2004 product announcements confirm compliance with EU Directive 2002/95/EC.