Infineon Technologies ADM6992CX-AB-T-1

Overview

ADM6992CX-AB-T-1 from Infineon Technologies is a two-port 10/100 Mbps L2 Ethernet switch IC with integrated dual PHYs (10/100Base-TX and 100Base-FX), enabling fiber-to-Fast Ethernet media conversion in a single chip. It supports store-and-forward, modified cut-through, and MII cut-through forwarding modes, delivers non-blocking wire-speed switching, and includes 6K×64-bit SRAM buffer, 1k MAC address table with 4-way associative hashing and aging, and 16-entry packet classification for TCP/UDP port, IP protocol ID, and Ethernet Type filtering - deployed in industrial media converters and telecom edge nodes.

For engineers reviewing the ADM6992CX-AB-T-1 datasheet, ADM6992CX-AB-T-1 pinout, ADM6992CX-AB-T-1 application, or ADM6992CX-AB-T-1 equivalent, key selection criteria include IEEE 802.3-compliant auto-MDIX and auto-negotiation support on both ports, hardware-based bandwidth control for ingress/egress traffic, SMI register access for low-cost microcontroller configuration, and green LQFP-64 packaging with 1.8 V/3.3 V dual-supply operation.

Technical Context

The ADM6992CX implements a full L2 switching engine with three configurable frame forwarding modes: store-and-forward (full error checking), modified cut-through (CRC check before forwarding), and MII cut-through (minimal latency). Its dual PHY interface handles simultaneous 10/100Base-TX over twisted pair and 100Base-FX over fiber, with Link Pass Through (LPT) mode enabling transparent physical-layer bridging between media types.

Configuration is managed via Serial Management Interface (SMI) or parallel EEPROM interface, supporting runtime updates to packet filters, VLAN tagging rules, and port statistics counters. The device uses a 4-way associative hash algorithm for MAC learning and provides smart counters for per-port RX/TX octets, frames, errors, and collisions - all accessible through dedicated SMI registers.

Key Specifications

Pinout & Package

ADM6992CX-AB-T-1 is housed in a 64-pin Low-Profile Quad Flat Package (LQFP) with 0.5 mm pitch, thermally enhanced for industrial ambient operation. Pin assignments are defined per Figure 2 and Tables 4–9 of the Rev. 1.02 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar two-port fiber-to-Ethernet converter applications.

Compared with ADM6992CX-AB-T-1, the Marvell 88E6060 demands external components to achieve fiber connectivity and lacks hardware-accelerated packet classification, while the RTL8305NB cannot natively terminate 100Base-FX signals - making ADM6992CX-AB-T-1 uniquely suited for compact, single-chip media converter designs requiring minimal external circuitry and deterministic L2 forwarding.

Availability

ADM6992CX-AB-T-1 is available at Aetrix Electronics and suitable for fiber-to-copper media converters, industrial Ethernet edge nodes, and telecom access equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.

Supply support for ADM6992CX-AB-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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and communications solutions, with global R&D and manufacturing infrastructure.

The Ninja C/CX product line was designed specifically for compact, low-power media conversion and edge-switching applications in telecom access, industrial networking, and building automation systems.

FAQ

Does ADM6992CX-AB-T-1 support Jumbo Frames?

Yes, it supports frames up to 9216 bytes in length, verified in Section 1.2 Features and Section 3.4.8 of the Rev. 1.02 datasheet. This enables efficient transport of large industrial control packets and video streams without fragmentation, provided external PHYs and connected devices also support jumbo frame handling.

What is the function of Link Pass Through (LPT) mode?

LPT mode disables L2 switching logic and creates a direct physical-layer path between Port 0 (TX) and Port 1 (FX), allowing bit-transparent bridging for applications like fiber extenders and repeaters. It is configured via EEPROM register 0x0003 bit [2] and maintains IEEE 802.3 timing alignment across media types.

Can the MAC address table be managed dynamically during operation?

Yes - the device supports runtime MAC learning with configurable aging time (register 0x000C), manual entry via SMI writes to address table registers (0x0100–0x04FF), and selective flushing. Aging intervals range from 5 seconds to 4096 seconds, adjustable per port through register 0x000B.

Is the 64-pin LQFP package lead-free and RoHS compliant?

Yes, the "-AB-T-1" suffix denotes the green RoHS-compliant version with lead-free terminations and halogen-free molding compound, explicitly confirmed in the Revision History (Rev. 1.02, Nov. 2005) and Packaging section (page 78) of the datasheet.